Set unique constraints for email and mobile

migrations/versions/9ee45f714f8b_set_unique_fields_in_users_table.py

@@ -0,0 +1,31 @@
+"""set unique fields in users table
+
+Revision ID: 9ee45f714f8b
+Revises: 0a4f01e489de
+Create Date: 2020-09-12 18:25:17.026880
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "9ee45f714f8b"
+down_revision = "0a4f01e489de"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    fields = ["email", "mobile"]
+    for item in fields:
+        query = "DELETE FROM users WHERE email = '' AND status = 0"
+        op.execute(query)
+        with op.batch_alter_table("users") as batch_op:
+            batch_op.create_unique_constraint(
+                constraint_name="uq_users_{}".format(item), columns=[item],
+            )
+
+
+def downgrade():
+    pass