function hook_views_query_alter

Alter the query before executing the query.

This hook should be placed in MODULENAME.views.inc and it will be auto-loaded. MODULENAME.views.inc must be in the directory specified by the 'path' key returned by MODULENAME_views_api(), or the same directory as the .module file, if 'path' is unspecified.

Parameters

object $view: The view object about to be processed.

object $query: An object describing the query.

See also

hook_views_query_substitutions()

Related topics

Views hooks
Hooks that can be implemented by other modules in order to implement the
Views API.
1 invocation of hook_views_query_alter()
views_plugin_query_default::alter in plugins/views_plugin_query_default.inc
Let modules modify the query just prior to finalizing it.

File

./views.api.php, line 1167

Code

function hook_views_query_alter(&$view, &$query) {
    // (Example assuming a view with an exposed filter on node title.)
    // If the input for the title filter is a positive integer, filter against
    // node ID instead of node title.
    if ($view->name == 'my_view' && is_numeric($view->exposed_raw_input['title']) && $view->exposed_raw_input['title'] > 0) {
        // Traverse through the 'where' part of the query.
        foreach ($query->where as &$condition_group) {
            foreach ($condition_group['conditions'] as &$condition) {
                // If this is the part of the query filtering on title, change the
                // condition to filter on node ID.
                if ($condition['field'] == 'node.title') {
                    $condition = array(
                        'field' => 'node.nid',
                        'value' => $view->exposed_raw_input['title'],
                        'operator' => '=',
                    );
                }
            }
            unset($condition);
        }
        unset($condition_group);
    }
}