使用meta来匹配WP_Query中的日期

Question

I have some posts with a custom filed named "event_end_date". I am using Advanced custom fields for that. How can I get the posts which have end_date older than today? I was trying with this, but could not get through.

$args = array(
        'cat'       => '6, -33',
        'numberposts'   => -1,
        'post_type'     => 'post',
        'meta_query'    => array(
            array(
                'key' => 'event_end_date',
                'value' => date('y-m-d'),
                'type' => 'DATE',
                'compare' => '>'
            )
        )
    );

//get results
$the_query = new WP_Query( $args );

Here I wanted those posts which have category '6' and does not have category '33'. In the backend, the field - 'event_end_date' has these:

Field Type: Date Picker
Display format: 10/11/2014
Return format: 20141110

Answer 1

I think if you were too look more closely at the data being stored in that actual custom/meta field, you'd find that it's stored as a unix timestamp, not in the return or display format, and because of that, your problem is that your format's don't match up.

You can account for that difference by using the U code for unix timestamp with date('U') instead of date('ym-d') .

In that case your code would look like this:

$args = array(
    'cat'       => '6,-33',
    'numberposts'   => -1,
    'post_type'     => 'post',
    'meta_query'    => array(
        array(
            'key' => 'event_end_date',
            'value' => date('U'),
            'type' => 'DATE',
            'compare' => '>'
        )
    )
);

//get results
$the_query = new WP_Query( $args );

Answer 2

Using date('Ym-d', time()) solved the problem for me.

$args = array(
        'category__and'     => array(6),
        'category__not_in'  => array(33),
        'numberposts'       => -1,
        'post_type'         => 'post',
        'post_status'       => 'publish',
        'meta_query'        => array(
            array(
                'key'       => 'event_end_date',
                'value'     => date('Y-m-d', time()),
                'type'      => 'DATE',
                'compare'   => '<'
            )
        )
    );