Merge remote-tracking branch 'origin/dev'

breccia_mapper/urls.py

@@ -19,7 +19,11 @@ from django.urls import include, path
 from . import views
 
 urlpatterns = [
-    path('admin/', admin.site.urls),
+    path('admin/',
+         admin.site.urls),
+
+    path('select2/',
+         include('django_select2.urls')),
 
     path('',
          include('django.contrib.auth.urls')),
@@ -36,4 +40,4 @@ urlpatterns = [
 
     path('',
          include('activities.urls')),
-]
+]  # yapf: disable

export/serializers/__init__.py

@@ -2,3 +2,9 @@ from . import (
     activities,
     people
 )
+
+
+__all__ = [
+    'activities',
+    'people',
+]

export/views/__init__.py

@@ -4,3 +4,10 @@ from . import (
     activities,
     people
 )
+
+
+__all__ = [
+    'activities',
+    'people',
+    'ExportListView',
+]

people/admin.py

@@ -21,19 +21,34 @@ class OrganisationAdmin(admin.ModelAdmin):
     pass
 
 
-@admin.register(models.Role)
-class RoleAdmin(admin.ModelAdmin):
-    pass
-
-
 @admin.register(models.Theme)
 class ThemeAdmin(admin.ModelAdmin):
     pass
 
 
+class PersonQuestionChoiceInline(admin.TabularInline):
+    model = models.PersonQuestionChoice
+
+
+@admin.register(models.PersonQuestion)
+class PersonQuestionAdmin(admin.ModelAdmin):
+    inlines = [
+        PersonQuestionChoiceInline,
+    ]
+
+
+class PersonAnswerSetInline(admin.TabularInline):
+    model = models.PersonAnswerSet
+    readonly_fields = [
+        'question_answers',
+    ]
+
+
 @admin.register(models.Person)
 class PersonAdmin(admin.ModelAdmin):
-    pass
+    inlines = [
+        PersonAnswerSetInline,
+    ]
 
 
 class RelationshipQuestionChoiceInline(admin.TabularInline):

people/forms.py

@@ -8,7 +8,7 @@ from django import forms
 from django.forms.widgets import SelectDateWidget
 from django.utils import timezone
 
-from django_select2.forms import Select2Widget, Select2MultipleWidget
+from django_select2.forms import ModelSelect2Widget, Select2Widget, Select2MultipleWidget
 
 from . import models
 
@@ -25,22 +25,58 @@ def get_date_year_range() -> typing.Iterable[int]:
 
 
 class PersonForm(forms.ModelForm):
-    """
-    Form for creating / updating an instance of :class:`Person`.
-    """
+    """Form for creating / updating an instance of :class:`Person`."""
     class Meta:
         model = models.Person
         fields = [
             'name',
-            'gender',
-            'age_group',
+        ]
+
+
+class RelationshipForm(forms.Form):
+    target = forms.ModelChoiceField(
+        models.Person.objects.all(),
+        widget=ModelSelect2Widget(search_fields=['name__icontains']))
+
+
+class DynamicAnswerSetBase(forms.Form):
+    field_class = forms.ModelChoiceField
+    field_widget = None
+    field_required = True
+    question_model = None
+
+    def __init__(self, *args, **kwargs):
+        super().__init__(*args, **kwargs)
+
+        for question in self.question_model.objects.all():
+            field_class = self.field_class
+            field_widget = self.field_widget
+
+            if question.is_multiple_choice:
+                field_class = forms.ModelMultipleChoiceField
+                field_widget = Select2MultipleWidget
+
+            field = field_class(label=question,
+                                queryset=question.answers,
+                                widget=field_widget,
+                                required=self.field_required)
+            self.fields['question_{}'.format(question.pk)] = field
+
+
+class PersonAnswerSetForm(forms.ModelForm, DynamicAnswerSetBase):
+    """Form for variable person attributes.
+
+    Dynamic fields inspired by https://jacobian.org/2010/feb/28/dynamic-form-generation/
+    """
+    class Meta:
+        model = models.PersonAnswerSet
+        fields = [
             'nationality',
             'country_of_residence',
             'organisation',
             'organisation_started_date',
             'job_title',
             'disciplines',
-            'role',
             'themes',
         ]
         widgets = {
@@ -53,27 +89,24 @@ class PersonForm(forms.ModelForm):
             'If you don\'t know the exact date, an approximate date is okay.',
         }
 
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
+    question_model = models.PersonQuestion
 
-        self.fields['organisation_started_date'].widget = SelectDateWidget(
-            years=get_date_year_range())
+    def save(self, commit=True) -> models.PersonAnswerSet:
+        # Save Relationship model
+        self.instance = super().save(commit=commit)
 
+        if commit:
+            # Save answers to relationship questions
+            for key, value in self.cleaned_data.items():
+                if key.startswith('question_') and value:
+                    try:
+                        self.instance.question_answers.add(value)
 
-class DynamicAnswerSetBase(forms.Form):
-    field_class = forms.ModelChoiceField
-    field_widget = None
-    field_required = True
+                    except TypeError:
+                        # Value is a QuerySet - multiple choice question
+                        self.instance.question_answers.add(*value.all())
 
-    def __init__(self, *args, **kwargs):
-        super().__init__(*args, **kwargs)
-
-        for question in models.RelationshipQuestion.objects.all():
-            field = self.field_class(label=question,
-                                     queryset=question.answers,
-                                     widget=self.field_widget,
-                                     required=self.field_required)
-            self.fields['question_{}'.format(question.pk)] = field
+        return self.instance
 
 
 class RelationshipAnswerSetForm(forms.ModelForm, DynamicAnswerSetBase):
@@ -88,6 +121,8 @@ class RelationshipAnswerSetForm(forms.ModelForm, DynamicAnswerSetBase):
             'relationship',
         ]
 
+    question_model = models.RelationshipQuestion
+
     def save(self, commit=True) -> models.RelationshipAnswerSet:
         # Save Relationship model
         self.instance = super().save(commit=commit)
@@ -96,8 +131,13 @@ class RelationshipAnswerSetForm(forms.ModelForm, DynamicAnswerSetBase):
             # Save answers to relationship questions
             for key, value in self.cleaned_data.items():
                 if key.startswith('question_') and value:
+                    try:
                         self.instance.question_answers.add(value)
 
+                    except TypeError:
+                        # Value is a QuerySet - multiple choice question
+                        self.instance.question_answers.add(*value.all())
+
         return self.instance
 
 
@@ -108,6 +148,7 @@ class NetworkFilterForm(DynamicAnswerSetBase):
     field_class = forms.ModelMultipleChoiceField
     field_widget = Select2MultipleWidget
     field_required = False
+    question_model = models.RelationshipQuestion
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)

people/migrations/0022_refactor_person_questions.py

@@ -0,0 +1,55 @@
+# Generated by Django 2.2.10 on 2020-11-23 14:29
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('people', '0021_refactor_person_disciplines'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='PersonQuestion',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('version', models.PositiveSmallIntegerField(default=1)),
+                ('text', models.CharField(max_length=255)),
+                ('order', models.SmallIntegerField(default=0)),
+            ],
+            options={
+                'ordering': ['order', 'text'],
+            },
+        ),
+        migrations.CreateModel(
+            name='PersonQuestionChoice',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('text', models.CharField(max_length=255)),
+                ('order', models.SmallIntegerField(default=0)),
+                ('question', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='answers', to='people.PersonQuestion')),
+            ],
+            options={
+                'ordering': ['question__order', 'order', 'text'],
+            },
+        ),
+        migrations.CreateModel(
+            name='PersonAnswerSet',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('timestamp', models.DateTimeField(auto_now_add=True)),
+                ('replaced_timestamp', models.DateTimeField(blank=True, editable=False, null=True)),
+                ('person', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='answer_sets', to='people.Person')),
+                ('question_answers', models.ManyToManyField(to='people.PersonQuestionChoice')),
+            ],
+            options={
+                'ordering': ['timestamp'],
+            },
+        ),
+        migrations.AddConstraint(
+            model_name='personquestionchoice',
+            constraint=models.UniqueConstraint(fields=('question', 'text'), name='unique_question_answer'),
+        ),
+    ]

people/migrations/0023_remove_person_role.py

@@ -0,0 +1,65 @@
+# Generated by Django 2.2.10 on 2020-11-25 15:50
+
+from django.core.exceptions import ObjectDoesNotExist
+from django.db import migrations
+from django.utils import timezone
+
+from .utils.question_sets import port_question
+
+
+def migrate_forward(apps, schema_editor):
+    Person = apps.get_model('people', 'Person')
+    Role = apps.get_model('people', 'Role')
+
+    role_question = port_question(apps, 'Role',
+                                  Role.objects.values_list('name', flat=True))
+
+    for person in Person.objects.all():
+        try:
+            prev_set = person.answer_sets.latest('timestamp')
+
+        except ObjectDoesNotExist:
+            prev_set = None
+
+        try:
+
+            answer_set = person.answer_sets.create()
+            answer_set.question_answers.add(
+                role_question.answers.get(text=person.role.name))
+
+            prev_set.replaced_timestamp = timezone.datetime.now()
+
+        except AttributeError:
+            pass
+
+
+def migrate_backward(apps, schema_editor):
+    Person = apps.get_model('people', 'Person')
+    Role = apps.get_model('people', 'Role')
+
+    for person in Person.objects.all():
+        try:
+            current_answers = person.answer_sets.latest('timestamp')
+            role_answer = current_answers.question_answers.get(
+                question__text='Role')
+            person.role, _ = Role.objects.get_or_create(name=role_answer.text)
+            person.save()
+
+        except ObjectDoesNotExist:
+            pass
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('people', '0022_refactor_person_questions'),
+    ]
+
+    operations = [
+        migrations.RunPython(migrate_forward, migrate_backward),
+        migrations.RemoveField(
+            model_name='person',
+            name='role',
+        ),
+        migrations.DeleteModel('Role'),
+    ]

people/migrations/0024_remove_age_gender.py

@@ -0,0 +1,120 @@
+# Generated by Django 2.2.10 on 2020-11-26 13:03
+
+from django.core.exceptions import ObjectDoesNotExist
+from django.db import migrations
+
+from backports.db.models.enums import TextChoices
+from .utils.question_sets import port_question
+
+
+class GenderChoices(TextChoices):
+    MALE = 'M', 'Male'
+    FEMALE = 'F', 'Female'
+    OTHER = 'O', 'Other'
+    PREFER_NOT_TO_SAY = 'N', 'Prefer not to say'
+
+
+class AgeGroupChoices(TextChoices):
+    LTE_25 = '<=25', '25 or under'
+    BETWEEN_26_30 = '26-30', '26-30'
+    BETWEEN_31_35 = '31-35', '31-35'
+    BETWEEN_36_40 = '36-40', '36-40'
+    BETWEEN_41_45 = '41-45', '41-45'
+    BETWEEN_46_50 = '46-50', '46-50'
+    BETWEEN_51_55 = '51-55', '51-55'
+    BETWEEN_56_60 = '56-60', '56-60'
+    GTE_61 = '>=61', '61 or older'
+    PREFER_NOT_TO_SAY = 'N', 'Prefer not to say'
+
+
+def migrate_forward(apps, schema_editor):
+    Person = apps.get_model('people', 'Person')
+
+    gender_question = port_question(apps, 'Gender', GenderChoices.labels)
+    age_question = port_question(apps, 'Age', AgeGroupChoices.labels)
+
+    for person in Person.objects.all():
+        try:
+            answer_set = person.answer_sets.latest('timestamp')
+
+        except ObjectDoesNotExist:
+            answer_set = person.answer_sets.create()
+
+        try:
+            gender = [
+                item for item in GenderChoices if item.value == person.gender
+            ][0]
+            answer_set.question_answers.filter(
+                question__text=gender_question.text).delete()
+            answer_set.question_answers.add(
+                gender_question.answers.get(text__iexact=gender.label))
+
+        except (AttributeError, IndexError):
+            pass
+
+        try:
+            age = [
+                item for item in AgeGroupChoices
+                if item.value == person.age_group
+            ][0]
+            answer_set.question_answers.filter(
+                question__text=age_question.text).delete()
+            answer_set.question_answers.add(
+                age_question.answers.get(text__iexact=age.label))
+
+        except (AttributeError, IndexError):
+            pass
+
+
+def migrate_backward(apps, schema_editor):
+    Person = apps.get_model('people', 'Person')
+
+    for person in Person.objects.all():
+        try:
+            current_answers = person.answer_sets.latest('timestamp')
+            age_answer = current_answers.question_answers.get(
+                question__text='Age')
+
+            person.age_group = [
+                item for item in AgeGroupChoices
+                if item.label == age_answer.text
+            ][0].value
+
+            person.save()
+
+        except ObjectDoesNotExist:
+            pass
+
+        try:
+            current_answers = person.answer_sets.latest('timestamp')
+            gender_answer = current_answers.question_answers.get(
+                question__text='Gender')
+            person.gender = [
+
+                item for item in GenderChoices
+                if item.label == gender_answer.text
+            ][0].value
+
+            person.save()
+
+        except ObjectDoesNotExist:
+            pass
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('people', '0023_remove_person_role'),
+    ]
+
+    operations = [
+        migrations.RunPython(migrate_forward, migrate_backward),
+        migrations.RemoveField(
+            model_name='person',
+            name='age_group',
+        ),
+        migrations.RemoveField(
+            model_name='person',
+            name='gender',
+        ),
+    ]

people/migrations/0025_rename_relationship_target.py

@@ -0,0 +1,26 @@
+# Generated by Django 2.2.10 on 2020-11-27 08:49
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('people', '0024_remove_age_gender'),
+    ]
+
+    operations = [
+        migrations.RemoveConstraint(
+            model_name='relationship',
+            name='unique_relationship',
+        ),
+        migrations.RenameField(
+            model_name='relationship',
+            old_name='target',
+            new_name='target_person',
+        ),
+        migrations.AddConstraint(
+            model_name='relationship',
+            constraint=models.UniqueConstraint(fields=('source', 'target_person'), name='unique_relationship'),
+        ),
+    ]

people/migrations/0026_move_static_person_questions.py

@@ -0,0 +1,148 @@
+# Generated by Django 2.2.10 on 2020-12-02 13:31
+
+from django.core.exceptions import ObjectDoesNotExist
+from django.db import migrations, models
+import django.db.models.deletion
+import django_countries.fields
+
+
+def migrate_forward(apps, schema_editor):
+    Person = apps.get_model('people', 'Person')
+    PersonAnswerset = apps.get_model('people', 'PersonAnswerSet')
+
+    fields = {
+        'country_of_residence',
+        'disciplines',
+        'job_title',
+        'nationality',
+        'organisation',
+        'organisation_started_date',
+        'themes',
+    }
+
+    for person in Person.objects.all():
+        try:
+            answer_set = person.answer_sets.last()
+
+        except ObjectDoesNotExist:
+            answer_set = person.answer_sets.create()
+
+        for field in fields:
+            value = getattr(person, field)
+            try:
+                setattr(answer_set, field, value)
+
+            except TypeError:
+                # Cannot directly set an m2m field
+                m2m = getattr(answer_set, field)
+                m2m.set(value.all())
+
+        answer_set.save()
+
+
+def migrate_backward(apps, schema_editor):
+    Person = apps.get_model('people', 'Person')
+    PersonAnswerset = apps.get_model('people', 'PersonAnswerSet')
+
+    fields = {
+        'country_of_residence',
+        'disciplines',
+        'job_title',
+        'nationality',
+        'organisation',
+        'organisation_started_date',
+        'themes',
+    }
+
+    for person in Person.objects.all():
+        try:
+            answer_set = person.answer_sets.last()
+
+            for field in fields:
+                value = getattr(answer_set, field)
+                try:
+                    setattr(person, field, value)
+
+                except TypeError:
+                    # Cannot directly set an m2m field
+                    m2m = getattr(person, field)
+                    m2m.set(value.all())
+
+            person.save()
+
+        except ObjectDoesNotExist:
+            pass
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('people', '0025_rename_relationship_target'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='personanswerset',
+            name='country_of_residence',
+            field=django_countries.fields.CountryField(blank=True, max_length=2, null=True),
+        ),
+        migrations.AddField(
+            model_name='personanswerset',
+            name='disciplines',
+            field=models.CharField(blank=True, max_length=255, null=True),
+        ),
+        migrations.AddField(
+            model_name='personanswerset',
+            name='job_title',
+            field=models.CharField(blank=True, max_length=255),
+        ),
+        migrations.AddField(
+            model_name='personanswerset',
+            name='nationality',
+            field=django_countries.fields.CountryField(blank=True, max_length=2, null=True),
+        ),
+        migrations.AddField(
+            model_name='personanswerset',
+            name='organisation',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, related_name='members', to='people.Organisation'),
+        ),
+        migrations.AddField(
+            model_name='personanswerset',
+            name='organisation_started_date',
+            field=models.DateField(null=True, verbose_name='Date started at this organisation'),
+        ),
+        migrations.AddField(
+            model_name='personanswerset',
+            name='themes',
+            field=models.ManyToManyField(blank=True, related_name='people', to='people.Theme'),
+        ),
+        migrations.RunPython(migrate_forward, migrate_backward),
+        migrations.RemoveField(
+            model_name='person',
+            name='country_of_residence',
+        ),
+        migrations.RemoveField(
+            model_name='person',
+            name='disciplines',
+        ),
+        migrations.RemoveField(
+            model_name='person',
+            name='job_title',
+        ),
+        migrations.RemoveField(
+            model_name='person',
+            name='nationality',
+        ),
+        migrations.RemoveField(
+            model_name='person',
+            name='organisation',
+        ),
+        migrations.RemoveField(
+            model_name='person',
+            name='organisation_started_date',
+        ),
+        migrations.RemoveField(
+            model_name='person',
+            name='themes',
+        ),
+    ]

people/migrations/0027_multiple_choice_questions.py

@@ -0,0 +1,23 @@
+# Generated by Django 2.2.10 on 2020-12-07 16:39
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('people', '0026_move_static_person_questions'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='personquestion',
+            name='is_multiple_choice',
+            field=models.BooleanField(default=False),
+        ),
+        migrations.AddField(
+            model_name='relationshipquestion',
+            name='is_multiple_choice',
+            field=models.BooleanField(default=False),
+        ),
+    ]

people/migrations/utils/question_sets.py

@@ -0,0 +1,23 @@
+
+import typing
+
+from django.core.exceptions import ObjectDoesNotExist
+
+
+def port_question(apps, question_text: str,
+                  answers_text: typing.Iterable[str]):
+    PersonQuestion = apps.get_model('people', 'PersonQuestion')
+
+    try:
+        prev_question = PersonQuestion.objects.filter(
+            text=question_text).latest('version')
+        question = PersonQuestion.objects.create(
+            text=question_text, version=prev_question.version + 1)
+
+    except ObjectDoesNotExist:
+        question = PersonQuestion.objects.create(text=question_text)
+
+    for answer_text in answers_text:
+        question.answers.get_or_create(text=answer_text)
+
+    return question

people/models/person.py

@@ -11,16 +11,18 @@ from django_countries.fields import CountryField
 from django_settings_export import settings_export
 from post_office import mail
 
-from backports.db.models.enums import TextChoices
+from .question import AnswerSet, Question, QuestionChoice
 
 logger = logging.getLogger(__name__)  # pylint: disable=invalid-name
 
 __all__ = [
     'User',
     'Organisation',
-    'Role',
     'Theme',
+    'PersonQuestion',
+    'PersonQuestionChoice',
     'Person',
+    'PersonAnswerSet',
 ]
 
 
@@ -36,7 +38,7 @@ class User(AbstractUser):
         """
         return hasattr(self, 'person')
 
-    def send_welcome_email(self):
+    def send_welcome_email(self) -> None:
         """Send a welcome email to a new user."""
         # Get exported data from settings.py first
         context = settings_export(None)
@@ -71,16 +73,6 @@ class Organisation(models.Model):
         return self.name
 
 
-class Role(models.Model):
-    """
-    Role which a :class:`Person` holds within the project.
-    """
-    name = models.CharField(max_length=255, blank=False, null=False)
-
-    def __str__(self) -> str:
-        return self.name
-
-
 class Theme(models.Model):
     """
     Project theme within which a :class:`Person` works.
@@ -91,6 +83,20 @@ class Theme(models.Model):
         return self.name
 
 
+class PersonQuestion(Question):
+    """Question which may be asked about a person."""
+
+
+class PersonQuestionChoice(QuestionChoice):
+    """Allowed answer to a :class:`PersonQuestion`."""
+    #: Question to which this answer belongs
+    question = models.ForeignKey(PersonQuestion,
+                                 related_name='answers',
+                                 on_delete=models.CASCADE,
+                                 blank=False,
+                                 null=False)
+
+
 class Person(models.Model):
     """
     A person may be a member of the BRECcIA core team or an external stakeholder.
@@ -113,39 +119,39 @@ class Person(models.Model):
         'self',
         related_name='relationship_sources',
         through='Relationship',
-        through_fields=('source', 'target'),
+        through_fields=('source', 'target_person'),
         symmetrical=False)
 
-    ###############################################################
-    # Data collected for analysis of community makeup and structure
+    @property
+    def relationships(self):
+        return self.relationships_as_source.all().union(
+            self.relationships_as_target.all())
 
-    class GenderChoices(TextChoices):
-        MALE = 'M', _('Male')
-        FEMALE = 'F', _('Female')
-        OTHER = 'O', _('Other')
-        PREFER_NOT_TO_SAY = 'N', _('Prefer not to say')
+    @property
+    def current_answers(self) -> 'PersonAnswerSet':
+        return self.answer_sets.last()
 
-    gender = models.CharField(max_length=1,
-                              choices=GenderChoices.choices,
-                              blank=True,
+    def get_absolute_url(self):
+        return reverse('people:person.detail', kwargs={'pk': self.pk})
+
+    def __str__(self) -> str:
+        return self.name
+
+
+class PersonAnswerSet(AnswerSet):
+    """The answers to the person questions at a particular point in time."""
+    #: Person to which this answer set belongs
+    person = models.ForeignKey(Person,
+                               on_delete=models.CASCADE,
+                               related_name='answer_sets',
+                               blank=False,
                                null=False)
 
-    class AgeGroupChoices(TextChoices):
-        LTE_25 = '<=25', _('25 or under')
-        BETWEEN_26_30 = '26-30', _('26-30')
-        BETWEEN_31_35 = '31-35', _('31-35')
-        BETWEEN_36_40 = '36-40', _('36-40')
-        BETWEEN_41_45 = '41-45', _('41-45')
-        BETWEEN_46_50 = '46-50', _('46-50')
-        BETWEEN_51_55 = '51-55', _('51-55')
-        BETWEEN_56_60 = '56-60', _('56-60')
-        GTE_61 = '>=61', _('61 or older')
-        PREFER_NOT_TO_SAY = 'N', _('Prefer not to say')
+    #: Answers to :class:`PersonQuestion`s
+    question_answers = models.ManyToManyField(PersonQuestionChoice)
 
-    age_group = models.CharField(max_length=5,
-                                 choices=AgeGroupChoices.choices,
-                                 blank=True,
-                                 null=False)
+    ##################
+    # Static questions
 
     nationality = CountryField(blank=True, null=True)
 
@@ -168,23 +174,8 @@ class Person(models.Model):
     #: Discipline(s) within which this person works
     disciplines = models.CharField(max_length=255, blank=True, null=True)
 
-    #: Role this person holds within the project
-    role = models.ForeignKey(Role,
-                             on_delete=models.PROTECT,
-                             related_name='holders',
-                             blank=True,
-                             null=True)
-
     #: Project themes within this person works
     themes = models.ManyToManyField(Theme, related_name='people', blank=True)
 
-    @property
-    def relationships(self):
-        return self.relationships_as_source.all().union(
-            self.relationships_as_target.all())
-
     def get_absolute_url(self):
-        return reverse('people:person.detail', kwargs={'pk': self.pk})
-
-    def __str__(self) -> str:
-        return self.name
+        return self.person.get_absolute_url()

people/models/question.py

@@ -0,0 +1,108 @@
+"""Base models for configurable questions and response sets."""
+import typing
+
+from django.db import models
+from django.utils.text import slugify
+
+
+class Question(models.Model):
+    """Questions from which a survey form can be created."""
+    class Meta:
+        abstract = True
+        ordering = [
+            'order',
+            'text',
+        ]
+
+    #: Version number of this question - to allow modification without invalidating existing data
+    version = models.PositiveSmallIntegerField(default=1,
+                                               blank=False,
+                                               null=False)
+
+    #: Text of question
+    text = models.CharField(max_length=255, blank=False, null=False)
+
+    #: Should people be able to select multiple responses to this question?
+    is_multiple_choice = models.BooleanField(default=False,
+                                             blank=False,
+                                             null=False)
+
+    #: Position of this question in the list
+    order = models.SmallIntegerField(default=0, blank=False, null=False)
+
+    @property
+    def choices(self) -> typing.List[typing.List[str]]:
+        """Convert the :class:`QuestionChoice`s for this question into Django choices."""
+        return [[choice.pk, str(choice)] for choice in self.answers.all()]
+
+    @property
+    def slug(self) -> str:
+        return slugify(self.text)
+
+    def __str__(self) -> str:
+        return self.text
+
+
+class QuestionChoice(models.Model):
+    """Allowed answer to a :class:`Question`."""
+    class Meta:
+        abstract = True
+        constraints = [
+            models.UniqueConstraint(fields=['question', 'text'],
+                                    name='unique_question_answer')
+        ]
+        ordering = [
+            'question__order',
+            'order',
+            'text',
+        ]
+
+    #: Question to which this answer belongs
+    #: This foreign key must be added to each concrete subclass
+    # question = models.ForeignKey(Question,
+    #                              related_name='answers',
+    #                              on_delete=models.CASCADE,
+    #                              blank=False,
+    #                              null=False)
+
+    #: Text of answer
+    text = models.CharField(max_length=255, blank=False, null=False)
+
+    #: Position of this answer in the list
+    order = models.SmallIntegerField(default=0, blank=False, null=False)
+
+    @property
+    def slug(self) -> str:
+        return slugify(self.text)
+
+    def __str__(self) -> str:
+        return self.text
+
+
+class AnswerSet(models.Model):
+    """The answers to a set of questions at a particular point in time."""
+    class Meta:
+        abstract = True
+        ordering = [
+            'timestamp',
+        ]
+
+    #: Entity to which this answer set belongs
+    #: This foreign key must be added to each concrete subclass
+    # person = models.ForeignKey(Person,
+    #                            on_delete=models.CASCADE,
+    #                            related_name='answer_sets',
+    #                            blank=False,
+    #                            null=False)
+
+    #: Answers to :class:`Question`s
+    #: This many to many relation must be added to each concrete subclass
+    # question_answers = models.ManyToManyField(QuestionChoice)
+
+    #: When were these answers collected?
+    timestamp = models.DateTimeField(auto_now_add=True, editable=False)
+
+    #: When were these answers replaced? - happens when another set is collected
+    replaced_timestamp = models.DateTimeField(blank=True,
+                                              null=True,
+                                              editable=False)

people/models/relationship.py

@@ -2,13 +2,12 @@
 Models describing relationships between people.
 """
 
-import typing
-
+from django.core.exceptions import ObjectDoesNotExist
 from django.db import models
 from django.urls import reverse
-from django.utils.text import slugify
 
 from .person import Person
+from .question import AnswerSet, Question, QuestionChoice
 
 __all__ = [
     'RelationshipQuestion',
@@ -18,79 +17,32 @@ __all__ = [
 ]
 
 
-class RelationshipQuestion(models.Model):
-    """
-    Question which may be asked about a relationship.
-    """
-    class Meta:
-        ordering = [
-            'order',
-            'text',
-        ]
-
-    #: Version number of this question - to allow modification without invalidating existing data
-    version = models.PositiveSmallIntegerField(default=1,
-                                               blank=False, null=False)
-
-    #: Text of question
-    text = models.CharField(max_length=255,
-                            blank=False, null=False)
-
-    #: Position of this question in the list
-    order = models.SmallIntegerField(default=0,
-                                     blank=False, null=False)
-
-    @property
-    def choices(self) -> typing.List[typing.List[str]]:
-        """
-        Convert the :class:`RelationshipQuestionChoice`s for this question into Django choices.
-        """
-        return [
-            [choice.pk, str(choice)] for choice in self.answers.all()
-        ]
-    
-    @property
-    def slug(self) -> str:
-        return slugify(self.text)
-
-    def __str__(self) -> str:
-        return self.text
+class RelationshipQuestion(Question):
+    """Question which may be asked about a relationship."""
 
 
-class RelationshipQuestionChoice(models.Model):
-    """
-    Allowed answer to a :class:`RelationshipQuestion`.
-    """
-    class Meta:
-        constraints = [
-            models.UniqueConstraint(fields=['question', 'text'],
-                                    name='unique_question_answer')
-        ]
-        ordering = [
-            'question__order',
-            'order',
-            'text',
-        ]
+class RelationshipQuestionChoice(QuestionChoice):
+    """Allowed answer to a :class:`RelationshipQuestion`."""
 
     #: Question to which this answer belongs
-    question = models.ForeignKey(RelationshipQuestion, related_name='answers',
+    question = models.ForeignKey(RelationshipQuestion,
+                                 related_name='answers',
                                  on_delete=models.CASCADE,
-                                 blank=False, null=False)
+                                 blank=False,
+                                 null=False)
 
-    #: Text of answer
-    text = models.CharField(max_length=255,
-                            blank=False, null=False)
 
-    #: Position of this answer in the list
-    order = models.SmallIntegerField(default=0,
-                                     blank=False, null=False)
+# class ExternalPerson(models.Model):
+#     """Model representing a person external to the project.
 
-    @property
-    def slug(self) -> str:
-        return slugify(self.text)
+#     These will never need to be linked to a :class:`User` as they
+#     will never log in to the system.
+#     """
+#     name = models.CharField(max_length=255,
+#                             blank=False, null=False)
 
-    def __str__(self) -> str:
-        return self.text
+#     def __str__(self) -> str:
+#         return self.name
 
 
 class Relationship(models.Model):
@@ -100,7 +52,7 @@ class Relationship(models.Model):
 
     class Meta:
         constraints = [
-            models.UniqueConstraint(fields=['source', 'target'],
+            models.UniqueConstraint(fields=['source', 'target_person'],
                                     name='unique_relationship'),
         ]
 
@@ -110,9 +62,20 @@ class Relationship(models.Model):
                                blank=False, null=False)
 
     #: Person with whom the relationship is reported
-    target = models.ForeignKey(Person, related_name='relationships_as_target',
+    target_person = models.ForeignKey(Person,
+                                      related_name='relationships_as_target',
                                       on_delete=models.CASCADE,
-                               blank=False, null=False)
+                                      blank=False,
+                                      null=False)
+    #   blank=True,
+    #   null=True)
+
+    # target_external_person = models.ForeignKey(
+    #     ExternalPerson,
+    #     related_name='relationships_as_target',
+    #     on_delete=models.CASCADE,
+    #     blank=True,
+    #     null=True)
 
     #: When was this relationship defined?
     created = models.DateTimeField(auto_now_add=True)
@@ -120,6 +83,13 @@ class Relationship(models.Model):
     #: When was this marked as expired?  Default None means it has not expired
     expired = models.DateTimeField(blank=True, null=True)
 
+    @property
+    def target(self) -> Person:
+        if self.target_person:
+            return self.target_person
+
+        raise ObjectDoesNotExist('Relationship has no target linked')
+
     @property
     def current_answers(self) -> 'RelationshipAnswerSet':
         return self.answer_sets.last()
@@ -137,35 +107,22 @@ class Relationship(models.Model):
 
         @raise Relationship.DoesNotExist: When the reverse relationship is not known
         """
-        return type(self).objects.get(source=self.target,
-                                      target=self.source)
+        return type(self).objects.get(source=self.target_person,
+                                      target_person=self.source)
 
 
-class RelationshipAnswerSet(models.Model):
-    """
-    The answers to the relationship questions at a particular point in time.
-    """
-
-    class Meta:
-        ordering = [
-            'timestamp',
-        ]
+class RelationshipAnswerSet(AnswerSet):
+    """The answers to the relationship questions at a particular point in time."""
 
     #: Relationship to which this answer set belongs
     relationship = models.ForeignKey(Relationship,
                                      on_delete=models.CASCADE,
                                      related_name='answer_sets',
-                                     blank=False, null=False)
+                                     blank=False,
+                                     null=False)
 
     #: Answers to :class:`RelationshipQuestion`s
     question_answers = models.ManyToManyField(RelationshipQuestionChoice)
 
-    #: When were these answers collected?
-    timestamp = models.DateTimeField(auto_now_add=True,
-                                     editable=False)
-    
-    replaced_timestamp = models.DateTimeField(blank=True, null=True,
-                                              editable=False)
-
     def get_absolute_url(self):
         return self.relationship.get_absolute_url()

people/permissions.py

@@ -23,7 +23,9 @@ class UserIsLinkedPersonMixin(UserPassesTestMixin):
             test_person = self.get_object()
 
             if not isinstance(test_person, models.Person):
-                raise AttributeError('View incorrectly configured: \'related_person_field\' must be defined.')
+                raise AttributeError(
+                    'View incorrectly configured: \'related_person_field\' must be defined.'
+                )
 
             return test_person
 
@@ -34,4 +36,5 @@ class UserIsLinkedPersonMixin(UserPassesTestMixin):
         Require that user is either staff or is the linked person.
         """
         user = self.request.user
-        return user.is_authenticated and (user.is_staff or self.get_test_person() == user.person)
+        return user.is_authenticated and (
+            user.is_staff or self.get_test_person() == user.person)

people/templates/people/person/detail.html

@@ -22,68 +22,80 @@
             </div>
         {% endif %}
 
+
+        {% with person.current_answers as answer_set %}
             <dl>
-            {% if person.gender %}
-                <dt>Gender</dt>
-                <dd>{{ person.get_gender_display }}</dd>
+            </dl>
+
+            <table class="table table-borderless">
+                <thead>
+                <tr>
+                    <th>Question</th>
+                    <th>Answer</th>
+                </tr>
+                </thead>
+
+                <tbody>
+                {% if answer_set.nationality %}
+                    <tr><td>Nationality</td><td>{{ answer_set.nationality.name }}</td>
                 {% endif %}
 
-            {% if person.age_group %}
-                <dt>Age Group</dt>
-                <dd>{{ person.get_age_group_display }}</dd>
+                {% if answer_set.country_of_residence %}
+                    <tr><td>Country of Residence</td><td>{{ answer_set.country_of_residence.name }}</td></tr>
                 {% endif %}
 
-            {% if person.nationality %}
-                <dt>Nationality</dt>
-                <dd>{{ person.nationality.name }}</dd>
+                {% if answer_set.organisation %}
+                    <tr><td>Organisation</td><td>{{ answer_set.organisation }}</td></tr>
                 {% endif %}
 
-            {% if person.country_of_residence %}
-                <dt>Country of Residence</dt>
-                <dd>{{ person.country_of_residence.name }}</dd>
+                {% if answer_set.organisation_started_date %}
+                    <tr><td>Organisation Started Date</td><td>{{ answer_set.organisation_started_date }}</td></tr>
                 {% endif %}
 
-            {% if person.organisation %}
-                <dt>Organisation</dt>
-                <dd>{{ person.organisation }}</dd>
-
-                {% if person.organisation_started_date %}
-                    <dt>Started Date</dt>
-                    <dd>{{ person.organisation_started_date }}</dd>
-                {% endif %}
+                {% if answer_set.job_title %}
+                    <tr><td>Job Title</td><td>{{ answer_set.job_title }}</td></tr>
                 {% endif %}
 
-            {% if person.job_title %}
-                <dt>Job Title</dt>
-                <dd>{{ person.job_title }}</dd>
+                {% if answer_set.disciplines %}
+                    <tr><td>Discipline(s)</td><td>{{ answer_set.disciplines }}</td></tr>
                 {% endif %}
 
-            {% if person.role %}
-                <dt>Role</dt>
-                <dd>{{ person.role }}</dd>
-            {% endif %}
-
-            {% if person.disciplines %}
-                <dt>Discipline(s)</dt>
-                <dd>{{ person.disciplines }}</dd>
-            {% endif %}
-
-            {% if person.themes.exists %}
-                <dt>Project Themes</dt>
-                <dd>
-                    {% for theme in person.themes.all %}
+                {% if answer_set.themes.exists %}
+                    <tr>
+                        <td>Project Themes</td>
+                        <td>
+                            {% for theme in answer_set.themes.all %}
                                 {{ theme }}{% if not forloop.last %}, {% endif %}
                             {% endfor %}
-                </dd>
-            {% endif %}
-        </dl>
+                        </td>
+                    </tr>
                 {% endif %}
 
+                {% for answer in answer_set.question_answers.all %}
+                    <tr>
+                        <td>{{ answer.question }}</td>
+                        <td>{{ answer }}</td>
+                    </tr>
+
+                {% empty %}
+                    <tr>
+                        <td>No records</td>
+                    </tr>
+                {% endfor %}
+                </tbody>
+            </table>
+
+            <p>Last updated: {{ answer_set.timestamp }}</p>
+        {% endwith %}
+
         <a class="btn btn-success"
            href="{% url 'people:person.update' pk=person.pk %}">Update</a>
 
+        {% if person.user == request.user %}
             <a class="btn btn-info"
                href="{% url 'password_change' %}?next={{ person.get_absolute_url }}">Change Password</a>
+        {% endif %}
+    {% endif %}
 
     <hr>
 

people/templates/people/person/list.html

@@ -11,10 +11,8 @@
 
     <hr>
 
-    {% if request.user.is_staff %}
     <a class="btn btn-success"
         href="{% url 'people:person.create' %}">New Person</a>
-    {% endif %}
 
     <table class="table table-borderless">
         <thead>

people/views/__init__.py

@@ -7,3 +7,10 @@ from . import (
     person,
     relationship
 )
+
+
+__all__ = [
+    'network',
+    'person',
+    'relationship',
+]

people/views/person.py

@@ -3,6 +3,7 @@ Views for displaying or manipulating instances of :class:`Person`.
 """
 
 from django.contrib.auth.mixins import LoginRequiredMixin
+from django.utils import timezone
 from django.views.generic import CreateView, DetailView, ListView, UpdateView
 
 from people import forms, models, permissions
@@ -55,9 +56,40 @@ class ProfileView(permissions.UserIsLinkedPersonMixin, DetailView):
 
 
 class PersonUpdateView(permissions.UserIsLinkedPersonMixin, UpdateView):
-    """
-    View for updating a :class:`Person` record.
-    """
-    model = models.Person
+    """View for updating a :class:`Person` record."""
+    model = models.PersonAnswerSet
     template_name = 'people/person/update.html'
-    form_class = forms.PersonForm
+    form_class = forms.PersonAnswerSetForm
+
+    def get_test_person(self) -> models.Person:
+        """Get the person instance which should be used for access control checks."""
+        return models.Person.objects.get(pk=self.kwargs.get('pk'))
+
+    def get(self, request, *args, **kwargs):
+        self.person = models.Person.objects.get(pk=self.kwargs.get('pk'))
+
+        return super().get(request, *args, **kwargs)
+
+    def post(self, request, *args, **kwargs):
+        self.person = models.Person.objects.get(pk=self.kwargs.get('pk'))
+
+        return super().post(request, *args, **kwargs)
+
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+
+        context['person'] = self.person
+
+        return context
+
+    def form_valid(self, form):
+        """Mark any previous answer sets as replaced."""
+        response = super().form_valid(form)
+        now_date = timezone.now().date()
+
+        # Shouldn't be more than one after initial updates after migration
+        for answer_set in self.person.answer_sets.exclude(pk=self.object.pk):
+            answer_set.replaced_timestamp = now_date
+            answer_set.save()
+
+        return response

people/views/relationship.py

@@ -2,9 +2,11 @@
 Views for displaying or manipulating instances of :class:`Relationship`.
 """
 
+from django.db import IntegrityError
+from django.forms import ValidationError
 from django.urls import reverse
 from django.utils import timezone
-from django.views.generic import CreateView, DetailView
+from django.views.generic import CreateView, DetailView, FormView
 
 from people import forms, models, permissions
 
@@ -18,7 +20,7 @@ class RelationshipDetailView(permissions.UserIsLinkedPersonMixin, DetailView):
     related_person_field = 'source'
 
 
-class RelationshipCreateView(permissions.UserIsLinkedPersonMixin, CreateView):
+class RelationshipCreateView(permissions.UserIsLinkedPersonMixin, FormView):
     """
     View for creating a :class:`Relationship`.
 
@@ -26,53 +28,45 @@ class RelationshipCreateView(permissions.UserIsLinkedPersonMixin, CreateView):
     """
     model = models.Relationship
     template_name = 'people/relationship/create.html'
-    fields = [
-        'source',
-        'target',
-    ]
-
-    def get_test_person(self) -> models.Person:
-        """
-        Get the person instance which should be used for access control checks.
-        """
-        if self.request.method == 'POST':
-            return models.Person.objects.get(pk=self.request.POST.get('source'))
+    form_class = forms.RelationshipForm
 
+    def get_person(self) -> models.Person:
         return models.Person.objects.get(pk=self.kwargs.get('person_pk'))
 
-    def get(self, request, *args, **kwargs):
-        self.person = models.Person.objects.get(pk=self.kwargs.get('person_pk'))
+    def get_test_person(self) -> models.Person:
+        return self.get_person()
 
-        return super().get(request, *args, **kwargs)
+    def form_valid(self, form):
+        try:
+            self.object = models.Relationship.objects.create(
+                source=self.get_person(), target=form.cleaned_data['target'])
 
-    def post(self, request, *args, **kwargs):
-        self.person = models.Person.objects.get(pk=self.kwargs.get('person_pk'))
+        except IntegrityError:
+            form.add_error(
+                None,
+                ValidationError('This relationship already exists',
+                                code='already-exists'))
+            return self.form_invalid(form)
 
-        return super().post(request, *args, **kwargs)
-
-    def get_initial(self):
-        initial = super().get_initial()
-
-        initial['source'] = self.request.user.person
-        initial['target'] = self.person
-
-        return initial
+        return super().form_valid(form)
 
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
 
-        context['person'] = self.person
+        context['person'] = self.get_person()
 
         return context
 
     def get_success_url(self):
-        return reverse('people:relationship.update', kwargs={'relationship_pk': self.object.pk})
+        return reverse('people:relationship.update',
+                       kwargs={'relationship_pk': self.object.pk})
 
 
 class RelationshipUpdateView(permissions.UserIsLinkedPersonMixin, CreateView):
     """
-    View for creating a :class:`Relationship`.
+    View for updating the details of a relationship.
 
+    Creates a new :class:`RelationshipAnswerSet` for the :class:`Relationship`.
     Displays / processes a form containing the :class:`RelationshipQuestion`s.
     """
     model = models.RelationshipAnswerSet
@@ -83,18 +77,21 @@ class RelationshipUpdateView(permissions.UserIsLinkedPersonMixin, CreateView):
         """
         Get the person instance which should be used for access control checks.
         """
-        relationship = models.Relationship.objects.get(pk=self.kwargs.get('relationship_pk'))
+        relationship = models.Relationship.objects.get(
+            pk=self.kwargs.get('relationship_pk'))
 
         return relationship.source
 
     def get(self, request, *args, **kwargs):
-        self.relationship = models.Relationship.objects.get(pk=self.kwargs.get('relationship_pk'))
+        self.relationship = models.Relationship.objects.get(
+            pk=self.kwargs.get('relationship_pk'))
         self.person = self.relationship.source
 
         return super().get(request, *args, **kwargs)
 
     def post(self, request, *args, **kwargs):
-        self.relationship = models.Relationship.objects.get(pk=self.kwargs.get('relationship_pk'))
+        self.relationship = models.Relationship.objects.get(
+            pk=self.kwargs.get('relationship_pk'))
         self.person = self.relationship.source
 
         return super().post(request, *args, **kwargs)
@@ -122,7 +119,8 @@ class RelationshipUpdateView(permissions.UserIsLinkedPersonMixin, CreateView):
         now_date = timezone.now().date()
 
         # Shouldn't be more than one after initial updates after migration
-        for answer_set in self.relationship.answer_sets.exclude(pk=self.object.pk):
+        for answer_set in self.relationship.answer_sets.exclude(
+                pk=self.object.pk):
             answer_set.replaced_timestamp = now_date
             answer_set.save()