Hi,
I’m trying to query the last row of a repeater field so that I can display posts by date based on a specific field in the last row.
I have a field called ‘record’ with two subfields ‘date_in’ and ‘date_out’.
So far I can query the ‘date_in’ sub field and it orders my posts, but only based on the first row of the repeater field rather than the last.
Any help appreciated. This is what I have so far:
// filter
function my_posts_where( $where ) {
$where = str_replace("meta_key = 'record_%", "meta_key LIKE 'record_%", $where);
return $where;
}
add_filter('posts_where', 'my_posts_where');
// args
$args = array(
'numberposts' => -1,
'post_type' => 'post',
'meta_query' => 'record_%_date_in',
'order' => 'ASC',
'orderby' => 'meta_value',
'meta_type' => 'DATETIME'
);
// query
$the_query = new WP_Query( $args);
There isn’t any way to do a query based on the last row of a repeater field. In order to do that you would need to have the same number of rows in every repeater and you’d need to replace the % in the query with the row number. For example, if a post has 5 rows the you’d query for ‘record_4_date_in’.
Querying by and ordering by repeater sub fields is always problematic and inconsistent. Rather than try to do this I’ve found that creating a consistent field that can be used is a better solutions. For example, lets say that you want to sort your posts by the last date_in sub field.
add_filter('acf/update_value/name=record', 'my_create_a_usable_field', 10, 3);
function my_create_a_usable_field($value, $post_id, $field) {
// $value will hold a nested array with the rows of the repeater
if (!is_array($value)) {
// the repeater is empty, bail early
return $value;
}
$last_row = end($value);
$date_in = $last_row['date_in'];
// now put it into a different field
// this field can be used in queries for filtering and sorting
update_post_meta($post_id, 'filterable_date_in', $date_in);
}
Please not that you may need to do more with the value, for example, converting it into correct MySQL date format. I’m not sure what the value of a date field will be at this point. At any rate, this is a little more work, but gives you what is needed in a form that’s usable.
This reply has been marked as private.
Hi, so I realised from the comments I still need to query this new field. I’ve added in the query to order posts by date with the newly created field, unfortunately to no avail. Any Ideas:
add_filter('acf/update_value/name=record', 'my_create_a_usable_field', 10, 3);
function my_create_a_usable_field($value, $post_id, $field) {
// $value will hold a nested array with the rows of the repeater
if (!is_array($value)) {
// the repeater is empty, bail early
return $value;
}
$last_row = end($value);
$date_in = $last_row['date_in'];
// now put it into a different field
// this field can be used in queries for filtering and sorting
update_post_meta($post_id, 'filterable_date_in', $date_in);
}
// args
$args = array(
'numberposts' => -1,
'post_type' => 'post',
'meta_query' => 'filterable_date_in',
'order' => 'ASC',
'orderby' => 'meta_value',
'meta_type' => 'DATETIME'
);
// query
$the_query = new WP_Query( $args);
The value stored by ACF is not a valid “DATETIME”. try numberic, or just delete the meta_type argument. and ‘meta_query’ for how you’re using it should be ‘meta_key’
You’ll also need to manually update every post to get the values of the new field into the database.
