Module Params Custom Validation is possible?

Question

Now I have situations to validate Module params in admin side of a module.

I know there is option with Filter in module params but its limited , I can't validate some patterns or custom conditions.

Is there any option available in Joomla to validate Module params on admin side ?

Thanks in Advance.

Answer 1

You can create a custom rule for validation. For example your module name is mod_mymodule:

• Add addrulepath attribute to the fieldset in the .xml file:

  addrulepath="modules/mod_mymodule"

This will be the path to the custom rule folder.

• Add validate attribute to the field with the name of the rule file:

  validate="testint"

This will give us the file testint.php.

• Create the rule file testint.php and put it to the path specified in the addrulepath attribute. So the full path will be:

  administrator/modules/mod_mymodule/testint.php

Here is a simple validation rule class:

class JFormRuleTestint extends JFormRule
{
    public function test(&$element, $value, $group = null, &$input = null, &$form = null)
    {
        return ((int)$value > 0 && (int)$value < 2);
    }
}

it should extend JFormRule class and you will need only one method, called test. $value will contain the input from the field. Here we are testing it to be integer between 0 and 2.