migration to remove Zulu locale. (#4353)

Migration for PR #4349

portal/config/eproms/Coding.json

@@ -6114,12 +6114,6 @@
       "resourceType": "Coding",
       "system": "urn:ietf:bcp:47"
     },
-    {
-      "code": "zu_ZA",
-      "display": "Zulu",
-      "resourceType": "Coding",
-      "system": "urn:ietf:bcp:47"
-    },
     {
       "code": "pt_BR",
       "display": "Portuguese (Brazil)",

portal/migrations/versions/d1f3ed8d16ef_.py

@@ -0,0 +1,43 @@
+"""remove Zulu locale
+
+Revision ID: d1f3ed8d16ef
+Revises: 80c3b1e96c45
+Create Date: 2023-12-05 14:09:10.442328
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = 'd1f3ed8d16ef'
+down_revision = '80c3b1e96c45'
+
+
+def upgrade():
+    # switch user's locale to GB english for any user with Zulu
+    op.execute(
+        "update users set locale_id = "
+        "(select codeable_concept_id from codeable_concept_codings where coding_id in "
+        "(select id from codings where code = 'en_GB')) where locale_id = "
+        "(select codeable_concept_id from codeable_concept_codings where coding_id in "
+        "(select id from codings where code = 'zu_ZA'))"
+    )
+
+    # remove the Zulu codeable_concept
+    op.execute(
+        "delete from codeable_concept_codings where coding_id in "
+        "(select id from codings where code = 'zu_ZA')")
+
+    # remove Zulu from any orgs
+    op.execute(
+        "delete from organization_locales where coding_id = (select id from codings where code = 'zu_ZA')"
+    )
+
+    # remove the Zulu coding
+    op.execute("delete from codings where code = 'zu_ZA'")
+
+
+def downgrade():
+    # no restoration path
+    pass