How to add categories, tags and custom fields when creating posts?

This doesn’t seem to work for me

function createPost(){
    wp.posts().create({
        title: data.title,
        content: data.subtitle,
        tag: [ 'vegan', 'dinner' ],
        category: [ 'berlin', 'copenhagen' ],

    }).then(function( response ) {
        // "response" will hold all properties of your newly-created post,
        // including the unique `id` the post was assigned on creation
        console.log("post created with id: " + response.id );
    });
}

[kadamwhite]

The chaining methods .category and .tag are only for filtering collections; if you’re creating a post, you’ll want to include the .tags or .categories arrays in the post data object, as you had it in the initial post up above. So, if we imagine ‘vegan’ is tag ID #1, ‘dinner’ is ID #2, category ‘berlin’ is ID #3, and ‘copenhagen’ is #4:

wp.posts().create({
    title: data.title,
    content: data.subtitle,
    tags: [ 1, 2 ],
    categories: [ 3, 4 ]
}).then(function( response ) {
    console.log( 'Post created with ID ' + response.id );
    console.log( 'Post categories: ' + response.categories.join() );
    console.log( 'Post tags: ' + response.tags.join() );
});

Hope that helps!

[kadamwhite]

@mrkrumhausen I do not believe so, but that’d be a good question to ask over on the main WP REST API repository.

I’m going to close this out, thanks for raising the issue and let me know if you run into any further trouble!