fix: replace profession with manytomany

apis_ontology/migrations/0004_remove_person_profession_profession_and_more.py

@@ -0,0 +1,31 @@
+# Generated by Django 4.1.11 on 2023-09-27 04:53
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('apis_ontology', '0003_alter_event_kind_alter_institution_kind_and_more'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='person',
+            name='profession',
+        ),
+        migrations.CreateModel(
+            name='Profession',
+            fields=[
+                ('id', models.AutoField(auto_created=True, primary_key=True, serialize=False, verbose_name='ID')),
+                ('name', models.CharField(blank=True, max_length=255)),
+                ('parent', models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.CASCADE, to='apis_ontology.profession')),
+            ],
+        ),
+        migrations.AddField(
+            model_name='person',
+            name='profession',
+            field=models.ManyToManyField(blank=True, to='apis_ontology.profession'),
+        ),
+    ]

apis_ontology/models.py

@@ -61,6 +61,11 @@ class Title(models.Model):
     name = models.CharField(max_length=255, blank=True)
 
 
+class Profession(models.Model):
+    name = models.CharField(max_length=255, blank=True)
+    parent = models.ForeignKey('self', blank=True, null=True, on_delete=models.CASCADE)
+
+
 @reversion.register(follow=["rootobject_ptr"])
 class Event(LegacyStuffMixin, LegacyDateMixin, FixLegacyDateMixin, AbstractEntity):
     kind = models.CharField(max_length=255, blank=True, null=True)
@@ -79,7 +84,7 @@ class Person(LegacyStuffMixin, LegacyDateMixin, FixLegacyDateMixin, AbstractEnti
         ("third gender", "third gender"),
     )
     first_name = models.CharField(max_length=255, help_text="The persons´s forename. In case of more then one name...", blank=True, null=True)
-    profession = models.CharField(max_length=255, blank=True)
+    profession = models.ManyToManyField(Profession, blank=True)
     title = models.ManyToManyField(Title, blank=True)
     gender = models.CharField(max_length=15, choices=GENDER_CHOICES, blank=True, null=True)