Add property reputation handling

migrations/versions/fa97b0d0c351_property_performance_index.py

@@ -0,0 +1,56 @@
+"""property performance index
+
+Revision ID: fa97b0d0c351
+Revises: b470795db8e1
+Create Date: 2022-03-31 10:38:06.367277
+
+"""
+from alembic import op
+import sqlalchemy as sa
+from sqlalchemy.dialects import mysql
+from sqlalchemy import engine_from_config
+from sqlalchemy.engine import reflection
+
+# revision identifiers, used by Alembic.
+revision = 'fa97b0d0c351'
+down_revision = 'b470795db8e1'
+branch_labels = None
+depends_on = None
+
+
+def upgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    if not _table_has_column('properties', 'performance_cost'):
+        op.add_column(
+            'properties',
+            sa.Column(
+                'performance_cost',
+                mysql.DOUBLE(
+                    precision=20,
+                    scale=15,
+                    asdecimal=False
+                ),
+                server_default='0.0',
+                nullable=True
+            )
+        )
+    # ### end Alembic commands ###
+
+
+def downgrade():
+    # ### commands auto generated by Alembic - please adjust! ###
+    op.drop_column('properties', 'performance_cost')
+    # ### end Alembic commands ###
+
+
+def _table_has_column(table, column):
+    config = op.get_context().config
+    engine = engine_from_config(
+        config.get_section(config.config_ini_section), prefix='sqlalchemy.')
+    insp = reflection.Inspector.from_engine(engine)
+    has_column = False
+    for col in insp.get_columns(table):
+        if column not in col['name']:
+            continue
+        has_column = True
+    return has_column