alembic migration

db/alembic/versions/d6ed4b1b43d5_drop_foreign_key_constraint_on_tx_hash_.py

@@ -0,0 +1,39 @@
+"""Drop foreign key constraint on tx hash on ethereum_labels table
+
+Revision ID: d6ed4b1b43d5
+Revises: 72f1ad512b2e
+Create Date: 2021-09-23 21:02:46.577682
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = "d6ed4b1b43d5"
+down_revision = "72f1ad512b2e"
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint(
+        "fk_ethereum_labels_transaction_hash_ethereum_transactions",
+        "ethereum_labels",
+        type_="foreignkey",
+    )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.create_foreign_key(
+        "fk_ethereum_labels_transaction_hash_ethereum_transactions",
+        "ethereum_labels",
+        "ethereum_transactions",
+        ["transaction_hash"],
+        ["hash"],
+        ondelete="CASCADE",
+    )
+    # ### end Alembic commands ###