cristophergv

If possible, only the examples shown in internet is:

qod_remove_extra_data function ($ data, $ post, $ context) {
        // We only want to modify the 'view' context, for reading posts
        if ($ context! == 'view' || is_wp_error ($ data)) {
            return $ data;
        }
        // Here, we unset any data we do not want to see on the front end:
        unset ($data ['author']);
        unset ($data ['status']);
        // Continue unsetting whatever other fields you want return $ data;
    }
    add_filter ('json_prepare_post' 'qod remove extra_data', 12, 3);

and right is:

qod_remove_extra_data function ($ data, $ post, $ context) {
        // We only want to modify the 'view' context, for reading posts
        if ($ context! == 'view' || is_wp_error ($ data)) {
             unset ( $data->data ['excerpt']); //Example
             unset ($data->data ['content']); //Example
             unset ($data->data ['name field to remove'])
             //or
             unset ($data->data ['name field to remove'] ['name subfield if you only want to delete the sub-field of field' ])
             return $data;
         }
    }
    add_filter ('rest_prepare_post' 'qod_remove_extra_data', 12, 3);

IMPORTANT, Is:

add_filter ('rest_prepare_post' 'qod_remove_extra_data', 12, 3);

Not:

add_filter ('json_prepare_post' 'qod remove extra_data', 12, 3); //WRONG

If is Custom Post Type:

add_filter ('rest_prepare_{$post_type}' 'qod_remove_extra_data', 12, 3);

EXAMPLE: Name post type = product;

add_filter ('rest_prepare_product' 'qod_remove_extra_data', 12, 3);

With this code can remove the fields that you want the JSON. By using rest_prepare} _ {$ post_type decide that you eliminated every post_type fields, thus only affected the post_type you want and not all.

Hello rjme,

It is easy, when solicited query the system uses the parameters meta_key & meta_value as filters, namely:

If you created the custom field called special_field and its possible values ​​1 or 0 your query should look something like:

http://www.mywebsite.com/?json=get_posts&post_type=post&meta_key=special_field&meta_value=1 or = 0

according to whether you want to filter for 1 or 0.

If you have other custom field called my_special_field with possible values ​​yes or not your query would look like:

http://www.mywebsite.com/?json=get_posts&post_type=post&meta_key=my_special_field&meta_value=yes

or

http://www.mywebsite.com/?json=get_posts&post_type=post&meta_key=my_special_field&meta_value=no

Is everything, with that return values ​​can filter based on custom field.

Remember that you can use other parameters at WP_Query and seeing that functionality provides you.

https://codex.ww.wp.xz.cn/Class_Reference/WP_Query

Incidentally, the parameter post_type = post is optional, but it can be used in cases where for example you create a type of personalized post such artists, books, since that way you can get only results of such post as:

http://www.mywebsite.com/?json=get_posts&post_type=artista&meta_key=my_special_field&meta_value=no

or

http://www.mywebsite.com/?json=get_posts&post_type=libro&meta_key=author&meta_value=”armando “

Anything you say, have made mobile applications using as wordpress backend and json plugin-api, so I have some experience.

P.S. Sorry for the bad English but I speak Spanish and use google translate 🙂 hehe

/****
EN ESPAÑOL PARA MIS PAISANOS
*****/
Hola rjme,

Es facil, cuando solicited una consulta al sistema, usa los parametros meta_key & meta_value como filtros, es decir:

Si el campo personalizado que creaste se llama special_field y tiene como posibles valores 1 o 0 tu consulta deberia ser algo asi:

http://www.mywebsite.com/?json=get_posts&post_type=post&meta_key=special_field&meta_value=1 or =0

segun quieras filtrar ya sea por 1 o por 0.

Si tienes otro campo personalizado que se llama my_special_field con posible valores yes or not tu consulta quedaria asi:

http://www.mywebsite.com/?json=get_posts&post_type=post&meta_key=my_special_field&meta_value=yes

or

http://www.mywebsite.com/?json=get_posts&post_type=post&meta_key=my_special_field&meta_value=no

Es todo, con eso puedes filtrar los valores devueltos basado en campo personalizado.

Recuerda que puedes usar otros parametros consultando WP_Query y viendo que funcionalidades te provee.

https://codex.ww.wp.xz.cn/Class_Reference/WP_Query

Por cierto, el parametro post_type=post es opcional, pero lo puedes usar en casos donde por ejemplo hayas creado un tipo de post personalizado por ejemplo Artistas, Libros, ya que de esa manera puedes obtener solo resultados de ese tipo de post por ejemplo:

http://www.mywebsite.com/?json=get_posts&post_type=artista&meta_key=my_special_field&meta_value=no

or

http://www.mywebsite.com/?json=get_posts&post_type=libro&meta_key=author&meta_value=”armando”

Cualquier cosa me dices, he realizado aplicaciones moviles usando como backend wordpress y el plugin json-api, asi que tengo algo de experiencia.

P.D. Lamento el mal ingles pero hablo español y use google translate jeje 🙂

Excellent dphiffer. You are the best.

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Active this option.

Have a nice day.

Good luck.