## wiring.delegating_writer()


Return a writer that passes the invalid rows to the asset's own IO manager.


Usage

``` python
wiring.delegating_writer(context)
```


The manager stores the rows under the asset key `<name>_quarantine`, as it stores any other asset: `PolarsParquetIOManager` writes a parquet file beside the table, and `DuckDBPolarsIOManager` writes a table beside it. The writer discards the metadata the manager emits for this write.


## Parameters


`context: dg.AssetExecutionContext`  
Its asset definition must have exactly one asset, as a `@dg.asset` does.


## Returns


`A writer that takes the invalid rows and returns the quarantine's asset key as a string.`  


## Raises


`dagster._core.errors.DagsterInvalidPropertyError`  
There is no step, which means a direct invocation. Use [file_writer](wiring.file_writer.md#dagster_dataframely.wiring.file_writer) there.