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frm_set_comparison_type_for_lookup

Last Updated: May 1, 2018

Knowledge Base → Extend Formidable Forms → Formidable Hooks - for Developers → Field Options and Values → frm_set_comparison_type_for_lookup
Heads up!
This article contains PHP code and is intended for developers. We offer this code as a courtesy, but don't provide support for code customizations or 3rd party development.

This hook can be used to change the comparison operator for Lookup fields. By default, Lookup fields only retrieve values that are exactly equal to the selected/entered value.

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Usage

add_filter('frm_set_comparison_type_for_lookup', 'my_custom_comparison_for_lookups', 10, 3);

Parameters

  • $comparison (string)
  • $parent_field (object)
  • $child_field (object)

Examples

Change to like

Use the code below to change from the default equals comparison to the SQL LIKE operator for Lookup field data retrieval. The SQL LIKE operator checks if a value contains another value. Just change 123 to the ID of the Lookup field that you would like to use a like comparison for.

add_filter( 'frm_set_comparison_type_for_lookup', 'customize_lookup_value_retrieval', 10, 3);
function customize_lookup_value_retrieval( $type, $parent_field, $child_field ) {
        if ( $parent_field->id == 123 ) {
            $type = 'like';
        }
	return $type;
}
  • Usage
  • Parameters
  • Examples
    • Change to like
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