Exporting WordPress Blog with WP JSON API

The Word­Press JSON API is a pow­er­ful tool for export­ing post con­tent in JSON for­mat, which can be used for migrat­ing data to Craft CMS. Here are the key points to consider:

1. Lim­i­ta­tions:

   • No built-in pag­i­na­tion support
   • Only out­puts cat­e­go­ry IDs by default, not names

2. Access­ing the API:

   • Go to your Word­Press site URL + “/wp-json/w­p/v2/­posts”
   • This end­point pro­vides JSON data for all posts

3. Import­ing to Craft using Feed Me:

   • Cre­ate a new feed in Feed Me
   • Set the feed URL to your Word­Press JSON API endpoint
   • Map Word­Press fields to Craft fields (title, slug, date, con­tent, etc.)
   • Set unique iden­ti­fiers (e.g., title and slug)

4. Han­dling Categories:

   • By default, the API only pro­vides cat­e­go­ry IDs
   • To get cat­e­go­ry names, you need to extend the API

5. Extend­ing the Word­Press JSON API:

   • Add this code to your theme’s functions.php file:

     add_action('rest_api_init', function() {  
     register_rest_field('post', 'category_data', array(  
     'get_callback' => function($post_arr) {  
     	$post_obj = get_post($post_arr['id']);  
     	return get_the_category($post_obj->post_category);  
     },  
     'schema' => array(  
     'description' => __( 'Category Data.'),  
     'type' => 'string'  
     ),  
     ));  
     f});
     

   • This adds a ​‘category_​data’ field to the API output

6. Import­ing Categories:

   • Update your Feed Me con­fig­u­ra­tion to use the new ​‘category_​data’ field
   • Map the cat­e­go­ry names and set Feed Me to cre­ate cat­e­gories if they don’t exist

Remem­ber, data manip­u­la­tion dur­ing export is often nec­es­sary when migrat­ing between CMSs. It’s best to pre­pare your data before import­ing it into Craft, allow­ing Feed Me to pull in data in the exact for­mat you need.

For more infor­ma­tion on mod­i­fy­ing Word­Press JSON API respons­es, refer to the Word­Press REST API Hand­book (devel​op​er​.word​press​.org/​r​e​s​t​-api/).