Remove unique constraints for tag and category

alembic/versions/02c89ec39f85_remove_unique_constraints.py

@@ -0,0 +1,38 @@
+"""remove unique constraints
+
+Revision ID: 02c89ec39f85
+Revises: 2450600b8eaf
+Create Date: 2022-10-22 17:13:41.104431
+
+"""
+from alembic import op
+from sqlalchemy.sql import text
+
+
+# revision identifiers, used by Alembic.
+revision = '02c89ec39f85'
+down_revision = '2450600b8eaf'
+branch_labels = None
+depends_on = None
+
+
+def upgrade() -> None:
+    conn = op.get_bind()
+
+    remove_unique_constraints = """
+    ALTER TABLE projects
+    DROP CONSTRAINT projects_tag_key,
+    DROP CONSTRAINT projects_category_key
+    """
+    conn.execute(text(remove_unique_constraints))
+
+
+def downgrade() -> None:
+    conn = op.get_bind()
+
+    add_unique_constraints = """
+    ALTER TABLE projects
+    ADD CONSTRAINT projects_tag_key UNIQUE (tag),
+    ADD CONSTRAINT projects_category_key UNIQUE (category)
+    """
+    conn.execute(text(add_unique_constraints))