Fix collection display name field

ccdb/collections_ccdb/migrations/0003_DATA_fix_display_names.py

@@ -0,0 +1,22 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+    def migrate(apps, schema_editor):
+        Collection = apps.get_model('collections_ccdb', 'Collection')
+
+        for c in Collection.objects.all():
+            d = "{}_{}_{}_{}".format(c.project.name,
+                                     c.collection_end_date,
+                                     c.study_location.code,
+                                     c.collection_type.name)
+            c.display_name = d
+            c.save()
+
+    dependencies = [
+        ('collections_ccdb', '0002_DATA_initial'),
+    ]
+
+    operations = [
+        migrations.RunPython(migrate, migrations.RunPython.noop)
+    ]