Hi @henderson7,
There are a couple of ways to go about creating a new filter, just depends on how complicated you want to get with it.
1. Simple new filter with no options
When this is added to a query this will automatically add the parameter “author = current user ID”.
<?php
// Register new filter with Query Wrangler.
add_filter( 'qw_filters', 'qw_filter_author_is_current' );
function qw_filter_author_is_current( $filters ) {
$filters['author_is_current'] = array(
'title' => 'Author is current user',
'description' => 'Filter posts by current user as the post author',
'query_args_callback' => 'qw_generate_query_args_author_is_current',
'query_display_types' => array( 'page', 'widget' ),
);
return $filters;
}
// Modify the query arguments before the query is executed.
function qw_generate_query_args_author_is_current( &$args, $filter ) {
$args['author'] = get_current_user_id();
}
2. Slightly more complicated, a filter with options
This version let’s you choose the between “Is current user” and “Is Not current user”.
<?php
// Register new filter with Query Wrangler.
add_filter( 'qw_filters', 'qw_filter_author_is_current' );
function qw_filter_author_is_current( $filters ) {
$filters['author_is_current'] = array(
'title' => 'Author is current user',
'description' => 'Filter posts by current user as the post author',
'query_args_callback' => 'qw_generate_query_args_author_is_current',
'query_display_types' => array( 'page', 'widget' ),
'form_callback' => 'qw_filter_author_is_current_form',
);
return $filters;
}
// Provide an option form for the filter.
function qw_filter_author_is_current_form( $filter ) {
if ( empty( $filter['values']['operator'] ) ) {
$filter['values']['operator'] = 'author__in';
}
?>
<strong>Operator:</strong>
<select
class="qw-field-value qw-js-title"
name="<?php print $filter['form_prefix']; ?>[operator]">
<option value="author__in" <?php selected( $filter['values']['operator'], 'author__in' ) ?>>
Author is current user
</option>
<option value="author__not_in" <?php selected( $filter['values']['operator'], 'author__not_in' ) ?>>
Author is NOT current user
</option>
</select>
<?php
}
// Modify the query arguments before the query is executed.
function qw_generate_query_args_author_is_current( &$args, $filter ) {
if ( empty( $filter['values']['operator'] ) ) {
$filter['values']['operator'] = 'author__in';
}
$args[ $filter['values']['operator'] ] = [ get_current_user_id() ];
}
3. Use the existing “Callback” filter, and provide it with a simple function.
This is the simplest way to go, but is a little more brittle than providing an actual new QW filter.
function my_custom_callback_author_is_current( $args, $filter ) {
$args['author'] = get_current_user_id();
return $args;
}
—-
Hope this helps. I’m also happy to add something like this to the plugin if you’d like. Depending on your level of comfort, you’re welcome to submit a pull request to the GitHub repo (https://github.com/daggerhart/query-wrangler), or I can create it.
– Another filter example: https://github.com/daggerhart/query-wrangler/blob/master/docs/examples/filter.md
