WordPress REST API

by

POST

To fetch a WordPress post with the REST API the following URL is used :

https://admin.ki-leierbud.lu/wp-json/wp/v2/posts/xxx (xxx = post ID)

Example :

https://admin.ki-leierbud.lu/wp-json/wp/v2/posts/410

CATEGORY

To fetch a WordPress category post with the REST API the following URL is used :

https://admin.ki-leierbud.lu/wp-json/wp/v2/categories/yyy (yyy = category ID)

Example :

https://admin.ki-leierbud.lu/wp-json/wp/v2/categories/91

List of 100 categories

To fetch the first 100 categories from a WordPress web site :

https://admin.ki-leierbud.lu/wp-json/wp/v2/categories?per_page=100

[{"id":77,"count":0,"description":"","link":"https:\/\/admin.ki-leierbud.lu\/de\/archives\/category\/wissen\/ausbildung","name":"Ausbildung","slug":"ausbildung","taxonomy":"category","parent":29,"meta":[],"_links":{"self":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/categories\/77","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/taxonomies\/category"}],"up":[{"embeddable":true,"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/categories\/29"}],"wp:post_type":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/posts?categories=77"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}},

{"id":212,"count":2,"description":"","link":"https:\/\/admin.ki-leierbud.lu\/de\/archives\/category\/wissen\/fragen\/ausbildung-ki","name":"Ausbildung KI","slug":"ausbildung-ki","taxonomy":"category","parent":35,"meta":[],"_links":{"self":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/categories\/212","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/taxonomies\/category"}],"up":[{"embeddable":true,"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/categories\/35"}],"wp:post_type":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/posts?categories=212"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}},

{"id":33,"count":0,"description":"","link":"https:\/\/admin.ki-leierbud.lu\/pt\/archives\/category\/conhecimento","name":"Conhecimento","slug":"conhecimento","taxonomy":"category","parent":0,"meta":[],"_links":{"self":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/categories\/33","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/taxonomies\/category"}],"wp:post_type":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/posts?categories=33"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}},

{"id":27,"count":0,"description":"","link":"https:\/\/admin.ki-leierbud.lu\/fr\/archives\/category\/connaissances","name":"Connaissances","slug":"connaissances","taxonomy":"category","parent":0,"meta":[],"_links":{"self":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/categories\/27","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/categories"}],"about":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/taxonomies\/category"}],"wp:post_type":[{"href":"https:\/\/admin.ki-leierbud.lu\/wp-json\/wp\/v2\/posts?categories=27"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}},

Here is the list of the four first categories returned in the JSON file with their parent categories :

  • 77 >>> 29
  • 212 >>> 35
  • 33 >>> 0
  • 27 >>> 0

A “0” means that the category has no parent.

Here is a list with the returned categories to view the details provided :

CATEGORY from POST

To extract a category from a post JSON file : 

...... {"footnotes":""},"categories":[93],"tags":[201],"class_list":["post-410","post","type-post","status-publish","format-standard","hentry","category-image-style-easy-en-en","tag-simpson"],"translations":{"en":410},"_links":.....

Parent, Grand-parent and top CATEGORIES

To find the parent, grand-parent or top level categories from a post JSON file , we must proceed iteratively:

  1. fetch the POST JSON file and extract first category ID
  2. fetch the first CATEGORY JSON file and extract the parent category ID
  3. if the parent category is not 0, continue to fetch the PARENT CATEGORY JSON file and extract the grand-parent category ID
  4. if the grand-parent category is not 0, continue to fetch the GRAND-PARENT CATEGORY JSON file and extract the next level category ID