feat: add one-one relationship between user and cart table

migrations/versions/5b69bc8db7e7_add_one_one_relationship_between_cart_.py

@@ -0,0 +1,30 @@
+"""add one-one relationship between cart and user table
+
+Revision ID: 5b69bc8db7e7
+Revises: cd6dce4eb1ee
+Create Date: 2021-08-26 16:20:18.947078
+
+"""
+from alembic import op
+import sqlalchemy as sa
+
+
+# revision identifiers, used by Alembic.
+revision = '5b69bc8db7e7'
+down_revision = 'cd6dce4eb1ee'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.add_column('cart', sa.Column('user_id', sa.Integer(), nullable=True))
+    op.create_foreign_key('cart_ibfk_1', 'cart', 'user', ['user_id'], ['id'])
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_constraint('cart_ibfk_1', 'cart', type_='foreignkey')
+    op.drop_column('cart', 'user_id')
+    # ### end Alembic commands ###