How to use meta_query_find_compatible_table_alias filter in WordPress

meta_query_find_compatible_table_alias filter

Filters the table alias identified as compatible with the current clause.

To use the meta_query_find_compatible_table_alias filter, first you have to register it using add_filter. You can write this code into functions.php of your activated theme or in a custom WordPress Plugin.

WePlugins always prefer to create a custom WordPress Plugin while using hooks so nothing breaks when you update your WordPress Theme in the future.

In the below live example, we have defined a function weplugins_modify_meta_query_find_compatible_table_alias_defaults which takes 4 parameters and we registered using add_filter. The first parameter meta_query_find_compatible_table_alias is the name of the hook, The second parameter weplugins_modify_meta_query_find_compatible_table_alias_defaults is the name of the function which needs to be called, the third parameter is the priority of calling the hook if the same hook is used multiple times and the last parameter is the number of arguments (if any) to be passed in the registered function.

Sometimes, you have to remove a registered hook so you can use remove_filter to remove the meta_query_find_compatible_table_alias filter.

Parameters

Below are the 4 parameters required to use this hook:

• $alias : (string|false) Table alias, or false if none was found.
• $clause : (array) First-order query clause.
• $parent_query : (array) Parent of $clause.
• $query : (WP_Meta_Query) WP_Meta_Query object.

Live Example

Below is an example of how you can use this hook.

Example 1: Basic Usage

Modifying the table alias based on specific conditions.

    function weplugins_modify_meta_query_find_compatible_table_alias_defaults($alias, $clause, $parent_query, $query) { 
        // Update the $alias variable according to your website requirements and return this variable. 
        // You can modify the $alias variable conditionally too if you want.
        return $alias; 
    }
    // add the filter
    add_filter("meta_query_find_compatible_table_alias", "weplugins_modify_meta_query_find_compatible_table_alias_defaults", 10, 4);
    

Example 2: Conditional Alias Modification

Modifying the alias only if certain conditions in the clause are met.

    function weplugins_modify_meta_query_find_compatible_table_alias_conditionally($alias, $clause, $parent_query, $query) { 
        if (isset($clause['key']) && $clause['key'] == 'specific_key') {
            $alias = 'custom_alias';
        }
        return $alias; 
    }
    // add the filter
    add_filter("meta_query_find_compatible_table_alias", "weplugins_modify_meta_query_find_compatible_table_alias_conditionally", 10, 4);
    

Example 3: Removing the Hook

To remove a hook callback, use the example below.

    // remove the filter
    remove_filter("meta_query_find_compatible_table_alias", "weplugins_modify_meta_query_find_compatible_table_alias_defaults", 10, 4);
    

Please make sure to provide the same callback function name, priority, and number of arguments while removing the hook callback.

Contact Us

If you’re having any trouble using this hook, please contact our team and we’d be happy to assist you.