Add fields college and specialties to Journal

journals/migrations/0092_auto_20200906_0903.py

+# Generated by Django 2.2.11 on 2020-09-06 07:03
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('colleges', '0016_populate_colleges'),
+        ('ontology', '0007_Branch_Field_Specialty'),
+        ('journals', '0091_auto_20200821_1427'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='journal',
+            name='college',
+            field=models.ForeignKey(blank=True, null=True, on_delete=django.db.models.deletion.PROTECT, related_name='journals', to='colleges.College'),
+        ),
+        migrations.AddField(
+            model_name='journal',
+            name='specialties',
+            field=models.ManyToManyField(blank=True, related_name='journals', to='ontology.Specialty'),
+        ),
+    ]

journals/migrations/0093_journal_college.py

+# Generated by Django 2.2.11 on 2020-09-06 07:03
+
+from django.db import migrations
+
+
+def populate_journal_college(apps, schema_editor):
+    College = apps.get_model('colleges.College')
+    Journal = apps.get_model('journals.Journal')
+
+    for journal in Journal.objects.all():
+        field_name = journal.name.split(' ')[1]
+        if field_name != 'Selections':
+            college = College.objects.get(name=field_name)
+            journal.college = college
+            journal.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('journals', '0092_auto_20200906_0903'),
+    ]
+
+    operations = [
+        migrations.RunPython(populate_journal_college,
+                             reverse_code=migrations.RunPython.noop),
+    ]

journals/models/journal.py

@@ -21,11 +21,35 @@ def cost_default_value():
 
 
 class Journal(models.Model):
-    """Journal is a container of Publications with a unique issn and doi_label.
+    """Journal is a container of Publications, with a unique issn and doi_label.
 
     Publications may be categorized into issues or issues and volumes.
+
+    Each Journal falls under the auspices of a specific College, which is ForeignKeyed.
+    The only exception is Selections, which does not point to any College
+    (in fact: it falls under the auspices of all colleges at the same time).
+
+    A Journal's AcademicField is indirectly specified via the College, since
+    College has a ForeignKey to AcademicField.
+
+    Specialties can optionally be specified (and should be consistent with the
+    College's `acad_field`). If none are given, the Journal operates field-wide.
     """
 
+    college = models.ForeignKey(
+        'colleges.College',
+        on_delete=models.PROTECT,
+        related_name='journals',
+        blank=True, null=True
+    )
+
+    specialties = models.ManyToManyField(
+        'ontology.Specialty',
+        blank=True,
+        related_name='journals'
+    )
+
+    # TODO: remove discipline
     discipline = models.CharField(max_length=20, choices=SCIPOST_DISCIPLINES, default='physics')
     name = models.CharField(max_length=256, unique=True)
     name_abbrev = models.CharField(max_length=128, default='SciPost [abbrev]',