Views Contextual Filter Validator: Regular Expression (regex)

About

Views Contextual Filter Validator: Regular Expression adds a Views contextual filter validator that can evaluate an argument based on user-supplied regular expression pattern.

Requirements

This module does not require any additional modules outside of Drupal core.

Installation

Install as you would normally install a contributed Drupal module. See: https://drupal.org/documentation/install/modules-themes/modules-8 for further information.

Configuration

The module has no menu or modifiable settings. There is no configuration.

Use

Add a Regular express (regex) validator to a View's contextual filter to use this module. E.g. --

1. Create a new View with a page display.
2. Add a contextual filter (Advanced -> Contextual Filters -> Add).
3. From the "Add contextual filters" popup:
   • Select "Global" from the Category menu.
   • Enable the checkbox for the "Null" filter.
   • Click Add and configure contextual filters.
4. Under When the filter value IS available or a default is provided, select Specify validation criteria and set the following options:
   • Validator: Regular expression (regex)
   • Regular expression: /^\d{4}$/
   • Action to take if filter value does not validate: Show Page not found
5. Click Apply.
6. Click Save for the full view.

This example ensures that the first contextual filter is exactly four digits. If the filter contains any non-digits or is not exactly four characters, the View page will give a "Page not found" error.