refactor: Make Person.discipline free text

See #33

people/forms.py

@@ -25,7 +25,7 @@ class PersonForm(forms.ModelForm):
             'organisation',
             'organisation_started_date',
             'job_title',
-            'discipline',
+            'disciplines',
             'role',
             'themes',
         ]

people/migrations/0021_refactor_person_disciplines.py

@@ -0,0 +1,61 @@
+# Generated by Django 2.2.10 on 2020-06-24 14:19
+
+from django.db import migrations, models
+
+
+def migrate_forward(apps, schema_editor):
+    Person = apps.get_model('people', 'Person')
+
+    for person in Person.objects.all():
+        try:
+            person.disciplines = person.discipline.name
+            person.save()
+
+        except AttributeError:
+            pass
+
+
+def migrate_backward(apps, schema_editor):
+    Person = apps.get_model('people', 'Person')
+    Discipline = apps.get_model('people', 'Discipline')
+
+    for person in Person.objects.all():
+        try:
+            discipline_str = person.disciplines.split(',')[0]
+
+        except AttributeError:
+            pass
+
+        else:
+            # Returns None if not found - doesn't raise exception
+            discipline = Discipline.objects.filter(name=discipline_str).first()
+
+            if not discipline:
+                discipline = Discipline.objects.create(
+                    name=discipline_str,
+                    code=discipline_str
+                    if len(discipline_str) < 15 else discipline_str[:15])
+
+            person.discipline = discipline
+            person.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('people', '0020_person_organisation_started_date'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='person',
+            name='disciplines',
+            field=models.CharField(blank=True, max_length=255, null=True),
+        ),
+        migrations.RunPython(migrate_forward, migrate_backward),
+        migrations.RemoveField(
+            model_name='person',
+            name='discipline',
+        ),
+        migrations.DeleteModel(name='Discipline', ),
+    ]

people/models/person.py

@@ -19,7 +19,6 @@ __all__ = [
     'User',
     'Organisation',
     'Role',
-    'Discipline',
     'Theme',
     'Person',
 ]
@@ -82,19 +81,6 @@ class Role(models.Model):
         return self.name
 
 
-class Discipline(models.Model):
-    """
-    Discipline within which a :class:`Person` works.
-    """
-    name = models.CharField(max_length=255, blank=False, null=False)
-
-    #: Short code using system such as JACS 3
-    code = models.CharField(max_length=15, blank=True, null=False)
-
-    def __str__(self) -> str:
-        return self.name
-
-
 class Theme(models.Model):
     """
     Project theme within which a :class:`Person` works.
@@ -179,12 +165,8 @@ class Person(models.Model):
     #: Job title this person holds within their organisation
     job_title = models.CharField(max_length=255, blank=True, null=False)
 
-    #: Discipline within which this person works
-    discipline = models.ForeignKey(Discipline,
-                                   on_delete=models.PROTECT,
-                                   related_name='people',
-                                   blank=True,
-                                   null=True)
+    #: 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,

people/templates/people/person/detail.html

@@ -55,9 +55,9 @@
             <dd>{{ person.role }}</dd>
         {% endif %}
 
-        {% if person.dispipline %}
-            <dt>Discipline</dt>
-            <dd>{{ person.discipline }}</dd>
+        {% if person.disciplines %}
+            <dt>Discipline(s)</dt>
+            <dd>{{ person.disciplines }}</dd>
         {% endif %}
 
         {% if person.themes.exists %}