Method _get_check_sql

django/db/models/constraints.py:194–199

(self, model, schema_editor)

        return errors

    def _get_check_sql(self, model, schema_editor):
        query = Query(model=model, alias_cols=False)
        where = query.build_where(self.condition)
        compiler = query.get_compiler(connection=schema_editor.connection)
        sql, params = where.as_sql(compiler, schema_editor.connection)
        return sql % tuple(schema_editor.quote_value(p) for p in params)

    def constraint_sql(self, model, schema_editor):
        check = self._get_check_sql(model, schema_editor)