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57 lines
1.5 KiB
Python
57 lines
1.5 KiB
Python
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"""property performance index
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Revision ID: fa97b0d0c351
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Revises: b470795db8e1
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Create Date: 2022-03-31 10:38:06.367277
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"""
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from alembic import op
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import sqlalchemy as sa
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from sqlalchemy.dialects import mysql
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from sqlalchemy import engine_from_config
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from sqlalchemy.engine import reflection
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# revision identifiers, used by Alembic.
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revision = 'fa97b0d0c351'
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down_revision = 'b470795db8e1'
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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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if not _table_has_column('properties', 'performance_cost'):
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op.add_column(
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'properties',
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sa.Column(
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'performance_cost',
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mysql.DOUBLE(
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precision=20,
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scale=15,
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asdecimal=False
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),
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server_default='0.0',
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nullable=True
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)
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)
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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_column('properties', 'performance_cost')
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# ### end Alembic commands ###
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def _table_has_column(table, column):
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config = op.get_context().config
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engine = engine_from_config(
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config.get_section(config.config_ini_section), prefix='sqlalchemy.')
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insp = reflection.Inspector.from_engine(engine)
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has_column = False
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for col in insp.get_columns(table):
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if column not in col['name']:
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continue
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has_column = True
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return has_column
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