Include File ID (fid) in JSON Output for Image Fields

Problem/Motivation

In the Views Datasource module for Drupal 7, the JSON output for image fields is missing the file ID (fid) information. This information is critical for some applications that rely on the unique file identifier for further processing or referencing images and avoid duplication.

Steps to reproduce

1. Install and enable the Views Datasource module in a Drupal 7 environment.
2. Create a view that includes image fields.
3. Set the format of the view to JSON.
4. Observe the JSON output for the image fields; note that the file ID (fid) is not included.

Proposed resolution

The proposed resolution is to modify the _views_json_render_fields function in the views_json.module file to include the file ID (fid) in the JSON output. This involves adding lines of code to set the id attribute of the image fields in the JSON response.

Remaining tasks

• Review the patch to ensure it adheres to coding standards and does not introduce any regressions.
• Test the changes in various scenarios to verify the fid is correctly added to the JSON output.
• Update any relevant documentation to reflect the inclusion of the fid in the JSON output.

User interface changes

There are no user interface changes associated with this patch. The changes only affect the JSON output format.

API changes

There are no API changes associated with this patch.

Data model changes

There are no data model changes associated with this patch.