CMB2 use sanitize value function from CMB2 filters

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Hi,

I'm trying to create a category slider for the gridder.
The user should input a category (from a select dropdown) and the output should be an array of post ids and images.
I was thinking of doing it using the sanitize function provided by CMB2 but it doesn't seems to work (maybe because it is hooked on post save? boh)

Right now I'm retrieving the correct category id from the model variable.
I've also tried by using an async wp-json API call in order to render the images asyncronously but it is not working (even though I was excpecting thi behaviour).

Is there any way to reprocess the CMB2 input value before passing it to the gridder? Even as a PHP filter function...

P.s. Obviously on the frontend I manage to do wathever I want by using a Wp query on the $category_id returned value. I'm just asking in order to have a "better feeling" on backend gridder

Thank you in advance,
Ernesto

Hey Ernesto,

Sorry for the late reply.

I've also tried by using an async wp-json API call in order to render the images asyncronously but it is not working (even though I was excpecting thi behaviour).

Ok well, maybe this won't work.

I think the easiest thing to do would be:

Your JavaScript that is used to render the view in the Gridder. It could just contain a standard image that would kind of be a placeholder of what that element would look like. And then it could have a Text of the ID of the category.

You could also use javascript and ajax this way:
https://codex.wordpress.org/AJAX_in_Plugins

This way you could send the categorie's id to a php function via javascript and then get back the php function's markup.

This is kind of similar to what you have tried using a wp-json api call.

Hi @arminunruh,

thank you for the response!
I'm temporarily displaying a black square with the category ID and it works perfectly...it was just a detail I was guessing about.
Actually I think that using Ajax in this case wouldn't work either because the JS backend rendering is fired on mousemove (several times for second) and an Ajax call would fire too many times (the API call was just an extreme attempt to get it work and experimentate with it).

But as said before this is just a detail, I can easily live without it :)) If there was a way to integrate this function before the rendering function (for example by hooking to a CMB2 sanitize function) it could have worked.

Many thanks,
Ernesto