Filtering posts by post meta data

2 comments

1. The WP_Query object accepts a post meta argument. Generally speaking you want to do the following:

     $my_query = new WP_Query( 
       array(
         'post_type' => 'post',
         'meta_query' => array(
           array(
             'key' => 'project_cat',
             'value' => 'my-value',
           )
         ),
   
           // Other query properties
       ) 
     );
   

   Where ‘my-value’ is your ‘specified value’.

   Example usage:

     add_action( 'pre_get_posts' , 'my_pre_get_posts' );
   
     function my_pre_get_posts( $query ) {
   
       // Check this is main query and other conditionals as needed
       if( $query->is_main_query() ) {
           $query->set( 
             'meta_query', 
             array( 
               array(
                 'key' => 'project_cat',
                 'value' => 'my-value'
               )
             )
           );
       }
   
     }
   

   See WP_Query, pre_get_posts. All conditionals are available to you. Currently this runs on every main query – which you probably don’t want.

   Alternatively you can use query_posts (a simpler, but much less efficient way) to alter the query for only a specific instance in a template.

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2. you can filter the post based on the meta value and display the post on the cms page.

   'meta_query' => array(
           array(
               'key'     => 'front_page',
               'value'   => 'yes',
               'compare' => 'LIKE',
           ))
   

   please refer the tutorial for step by step explanation

   http://www.pearlbells.co.uk/filter-posts-custom-fields-wp_query/

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