Merge pull request #2320 from alphagov/letter_branding_data_migration

Letter branding data migration

migrations/versions/0257_letter_branding_migration.py

@@ -0,0 +1,31 @@
+"""empty message
+
+Revision ID: 0257_letter_branding_migration
+Revises: 0256_set_postage_tmplt_hstr
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0257_letter_branding_migration'
+down_revision = '0256_set_postage_tmplt_hstr'
+
+from alembic import op
+
+
+def upgrade():
+    op.execute("""INSERT INTO letter_branding (id, name, filename, domain)
+                SELECT uuid_in(md5(random()::text)::cstring), name, filename, null
+                from dvla_organisation""")
+
+    op.execute("""INSERT INTO service_letter_branding (service_id, letter_branding_id)
+               SELECT S.id, LB.id
+                 FROM services s
+                 JOIN dvla_organisation d on (s.dvla_organisation_id = d.id)
+                 JOIN letter_branding lb on (lb.filename = d.filename)
+                 WHERE d.id != '001'
+                 """)
+
+
+def downgrade():
+    op.execute('delete from service_letter_branding')
+    op.execute('delete from letter_branding')