.. _auto_string_contains:

*STRING CONTAINS*
=================

Checks whether a given string (haystack) contains a specified substring (needle) and returns a boolean result. Use this worker in workflows that need conditional branching or filtering based on substring presence.

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

Classification: **process**.

Tagged: ``boolean``, ``contains``, ``match``, ``process``, ``scalar``, ``search``, ``string``, ``substring``.

Inputs
------

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

   * - Label
     - ID
     - Type
     - Default
     - Required
     - Description
   * - Haystack
     - haystack
     - scalar
     - —
     - ✓
     - The full string to search within; provide any plain-text scalar value (e.g. a filename, label, or message) that will be inspected for the needle substring.
   * - Needle
     - needle
     - scalar
     - —
     - ✓
     - The substring to look for inside the haystack; supply the exact character sequence to match — the search is case-sensitive and no wildcards are supported.

Outputs
-------

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

   * - Label
     - ID
     - Type
     - Description
   * - string_contains_output_1
     - string_contains_output_1
     - scalar
     - Boolean-like scalar result (true/false or 1/0) indicating whether the needle was found within the haystack; use this value to drive conditional branching in downstream workflow nodes.

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

- platform.workflow

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

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

.. raw:: html

   <hr style="margin-top:2em">
   <p style="font-size:11px;color:#888">
   Auto-generated from <code>transformation</code> schema. Worker id: <code>string_contains</code>. Schema hash: <code>b189fd5d46a6</code>. Hand-curated docs in <code>workerexamples/</code> override this page when present.
   </p>