Wordpress REST API V2 return all posts

问题:

I am missing the function to get ALL the posts (or CPT) by using

example.com/wp-json/wp/v2/country/?per_page=-1

or any similiar. The documentation gives as much info as this:

per_page: Maximum number of items to be returned in result set.

Default: 10

And in another question about the per_page we learn that the allowed range is 1 to 100.

In my case there will be a limited number of posts I need to get, but it will be around 200-300. Are there any workarounds to get them all other than fetching everything page per page and stitching it together?

Additional info if it does matter: I am using angular.js

回答1:

Try this instead for pagination. It returns all the posts on my site.

http://example.com/wp-json/wp/v2/posts/?filter[category_name]=country&filter[posts_per_page]=-1

I get returns above 100 when entered like that and can cap them at 111 etc. http://example.com/wp-json/wp/v2/posts/?filter[category_name]=country&filter[posts_per_page]=111

For the modern WP scenarios the following function will allow you to give returns great than 99.

add_filter( 'rest_post_collection_params', 'big_json_change_post_per_page', 10, 1 );
function big_json_change_post_per_page( $params ) {
    if ( isset( $params['per_page'] ) ) {
        $params['per_page']['maximum'] = 200;
    }
    return $params;
}

回答2:

As of WP 4.7 you can increase the upper limit of WP REST API requests by hooking into the following filter:

rest_{$this->post_type}_collection_params

This snippet should do the trick for posts:

add_filter( 'rest_post_query', 'se35728943_change_post_per_page', 10, 2 );

function se35728943_change_post_per_page( $args, $request ) {
    $max = max( (int) $request->get_param( 'custom_per_page' ), 200 );
    $args['posts_per_page'] = $max;    
    return $args;
}

Note: you can not use standard per_page argument (with value more then 100) in request - wp api will respond with error immediately (so the hook will not help). That's in the above code wee use custom_per_page (you can use any another word).

Similar filter for taxonomies: rest_{$this->taxonomy}_query

Example:

add_filter( 'rest_tags_query', 'se35728943_change_terms_per_page', 2, 10 );

function se35728943_change_terms_per_page( $prepared_args, $request ){
    $max = max( 200, (int) $request->get_param( 'custom_per_page' ) );

    $prepared_args['number'] = $max;
    return $prepared_args;
}

回答3:

Couldn't get more than 10 with that syntax. Tried http://example.com/wp-json/wp/v2/posts?per_page=100 and worked up to 100.

回答4:

The bellow approch worked for me. I was able to retrieve posts from a site with 79 246 posts. I used pagination parameters . Within a loop, from 1 to TotalPages available. See the link for doc.

http://mydomain/wp-json/wp/v2/posts?_embed&per_page=100&page=793

per_page = 100 : means 100 posts max to be retrieved per page

page = 793 : means i have 793 pages with 100 posts per page. the last page had only 46 posts

A loop can then be used in a language of your choice.

回答5:

In WordPress 4.9.6, I had to use rest_{$this->post_type}_query

/* change amount of posts returned by REST API to 100 */
function rest_posts_per_page( $args, $request ) {
    $max = max( (int)$request->get_param( 'per_page' ), 100 );
    $args['posts_per_page'] = $max;
    return $args;
}
add_filter( 'rest_post_query', 'rest_posts_per_page', 10, 2 );

回答6:

A simpler way that comply with protocol is to collect all responses, in sequence, and perform single setState() call. As follows: (error handling omitted for readability)

componentDidMount(){

var uri = "http://your-server";
var totalPages = 0;
var allResults = [];

fetch(uri)
.then(response => {
  totalPages = response.headers.get('X-WP-TotalPages');
  return response.json()})
.then(results => {
  allResults = results;
  //console.log('Got results from server', results.length); 
  for (let i = 2; i <= totalPages ; i++){
    fetch(uri + "?page=" + i)
    .then(response => {return response.json()})
    .then( moreresults => {
      allResults = allResults.concat( moreresults ); 
     });
  }
  this.setState({responses: allResults });
});

}

回答7:

If you are planning on doing this with other parameters, you can also add categories etc as well. EG:

https://www.website.com/wp-json/wp/v2/posts?categories=61&per_page=100

回答8:

It's really possible to get more then 100 posts or terms (tags, categories).
You should use rest_{$this->post_type}_query hook (for posts) or rest_{$this->taxonomy}_query hook for terms.
But you have to know, that it's impossible to pass a per_page arg in your GET request with more then 100 value. WP API will throw an error immediately (the hook will not help): per_page must be between 1 (inclusive) and 100 (inclusive) (with 400 http status).
To get around this problem you should pass a per page value in another get argument. And after this to trace this value in your hook.
So the code is:

For posts

add_filter( 'rest_post_query', 's976_rest_post_per_page', 2, 10 );
function s976_rest_post_per_page( array $args, WP_REST_Request $request ) {
    $post_per_page = $request->get_param('s976_per_page') ? $request->get_param('s976_per_page') : 10;
    $args['posts_per_page'] = $post_per_page;
    return $args;
}

For terms

add_filter( 'rest_category_query', 's976_rest_cats_per_page', 2, 10 );
function s976_rest_cats_per_page( array $prepared_args, WP_REST_Request $request ){
    $cats_per_page = $request->get_param('s976_per_page') ? $request->get_param('s976_per_page') : 10;
    $prepared_args['number'] = $cats_per_page;
    return $prepared_args;
}

Of course, for this to work, you have to pass s976_per_page (with any value like 500, 99999) argument in GET request.

回答9:

I have been using this 's976_per_page' bit of code successfully so many thanks,but It only returns the 'publish' tagged posts,..
How could I get this to grab ALL statuses, or, alternatively, only a set / subset of statuses
Many Thanks
JMB