toimpl.py 文件源码

def add_column(operations, operation):
    table_name = operation.table_name
    column = operation.column
    schema = operation.schema

    t = operations.schema_obj.table(table_name, column, schema=schema)
    operations.impl.add_column(
        table_name,
        column,
        schema=schema
    )
    for constraint in t.constraints:
        if not isinstance(constraint, sa_schema.PrimaryKeyConstraint):
            operations.impl.add_constraint(constraint)
    for index in t.indexes:
        operations.impl.create_index(index)