.. _auto_dataset_write_to_file:

*WRITE DATASET TO FILE*
=======================

Serialises an in-memory dataset to a CSV file on disk. Writes the column headers followed by all rows in comma-separated format and returns the resulting file. Use this worker whenever a downstream step requires a dataset to be persisted as a flat file.

When to use
-----------

Classification: **process**.

Tagged: ``csv``, ``dataset``, ``export``, ``file_output``, ``write``.

Inputs
------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20 20 20

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Response To Extract From
     - responsetoextractfrom
     - dataset
     - —
     - 
     - The dataset (tabular, in-memory) to be written to disk; each row becomes a CSV line with column headers derived from the dataset keys.
   * - File Name
     - file_name
     - scalar
     - Unknown
     - 
     - Desired output filename (including extension, e.g. 'results.csv'); defaults to 'Unknown' if left blank — always provide a meaningful name so the file is identifiable downstream.

Outputs
-------

.. list-table::
   :header-rows: 1
   :widths: 20 20 20 20

   * - Label
     - ID
     - Type
     - Description
   * - dataset_write_to_file_output_1
     - dataset_write_to_file_output_1
     - file
     - The generated CSV file written to the platform's temporary directory; contains a header row followed by all dataset rows in comma-separated format, ready for download or further processing.

Disciplines
-----------

- data.io.csv
- data.io.file

Runnable example
----------------

A runnable example is registered for this worker. Open the example workflow on the d3VIEW canvas: `/api/workflow/example?id=dataset_write_to_file <https://www.d3view.com/api/workflow/example?id=dataset_write_to_file>`_

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>dataset_write_to_file</code>. Schema hash: <code>e77c43d792dc</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>