Text fields shouldn't have null=True. (#94)

apps/map/migrations/0069_remove_null_from_text_fields.py

@@ -0,0 +1,79 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.15 on 2018-09-22 17:43
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import multiselectfield.db.fields
+
+from apps.map.models import CaseStudy
+
+string_fields = [
+    'additional_technical_details',
+    'associated_infrastructure',
+    'biomass_detail',
+    'community_voices',
+    'contractor_or_supplier_of_technology',
+    'direct_comms',
+    'entry_name',
+    'full_description',
+    'generation_equipment_supplier',
+    'generation_technology',
+    'generation_technology_other',
+    'identified_partnerships',
+    'isolated_or_widespread',
+    'key_actors_involved',
+    'land_ownership',
+    'land_ownership_details',
+    'media_coverage_independent',
+    'media_coverage_mainstream',
+    'minerals_or_commodities',
+    'minerals_or_commodities_other',
+    'name_of_territory_or_area',
+    'negative_case_reasons',
+    'negative_case_reasons_other',
+    'negative_socioenvironmental_impacts',
+    'obstacles_and_hindrances',
+    'positive_case_type',
+    'potential_partnerships',
+    'power_technology',
+    'power_technology_other',
+    'project_status',
+    'project_status_detail',
+    'projected_production_of_commodities',
+    'sector_of_economy',
+    'size_of_concessions',
+    'social_media_links',
+    'socioeconomic_benefits',
+    'total_investment',
+    'type_of_ecosystem',
+    'type_of_extraction',
+    'use_in_energy_economy',
+    'use_in_energy_economy_other',
+    'video_caption',
+    'video_credit',
+    'when_did_organising_start',
+    'who_has_been_involved',
+]
+
+
+def remove_nulls(apps, schema_editor):
+    # We can't import the Person model directly as it may be a newer
+    # version than this migration expects. We use the historical version.
+    study = apps.get_model('map', 'CaseStudy')
+    for study in CaseStudy.objects.all():
+        for field in string_fields:
+            if study._meta.get_field(field) == None:
+                setattr(study, field, '')
+
+        study.save()
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('map', '0068_casestudydraft_created'),
+    ]
+
+    operations = [
+        migrations.RunPython(remove_nulls),
+    ]