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32 lines
813 B
Python
32 lines
813 B
Python
5 years ago
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"""parent child relations
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Revision ID: 4b6c6a23c639
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Revises: 71386dc42f9b
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Create Date: 2020-03-18 16:17:09.512280
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"""
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from alembic import op
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import sqlalchemy as sa
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import sqlalchemy_utc
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# revision identifiers, used by Alembic.
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revision = '4b6c6a23c639'
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down_revision = '71386dc42f9b'
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branch_labels = None
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depends_on = None
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def upgrade():
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# ### commands auto generated by Alembic - please adjust! ###
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op.add_column('post', sa.Column('parent_id', sa.Integer(), nullable=True))
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op.create_foreign_key(None, 'post', 'post', ['parent_id'], ['id'])
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# ### end Alembic commands ###
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def downgrade():
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# ### commands auto generated by Alembic - please adjust! ###
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op.drop_constraint(None, 'post', type_='foreignkey')
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op.drop_column('post', 'parent_id')
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# ### end Alembic commands ###
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