MB Relationships display only post name

This topic has 11 replies, 2 voices, and was last updated 4 years, 5 months ago by eazy.

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May 28, 2019 at 3:52 AM #14727

eazy
Participant

Hello, i'm creating relations programatically, there is a way to display only the values stored from db instead of all possible options inside the select?

So user can only view and sort order the relations from backend but cant create/view new one.

Actually i'm using MB_Relationships_API::add but this api can't sort/update the relations

I need some help to understand which part of code i need to change.

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May 28, 2019 at 11:46 PM #14739

eazy
Participant

Any help is appreciated

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May 29, 2019 at 11:05 AM #14741
Anh Tran
Keymaster
Hi,

I think a way to get this done is add disabled attribute to the select dropdown. You can do that with this code:
```
add_action( 'init', function() {
    $mb = rwmb_get_registry( 'meta_box' )->get( 'posts_to_pages_relationships_to' );
    $mb->meta_box['fields'][0]['attributes']['disabled'] = true;
}, 99 );
```
And maybe add some CSS to hide the "+ Add more" button and the delete clone button.

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May 29, 2019 at 2:33 PM #14757

eazy
Participant

Thanks a lot, this helps the UI, but options rendering in html can be disabled?

If we have, 100k posts, and have relations post to post, every select will have 100k options and page load speed will be slow, some browsers will crash, i want to disable other options rendering, and render only the "selected" option. So user can order only the related items.

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May 29, 2019 at 2:44 PM #14759
Anh Tran
Keymaster
You can set query_args parameter for from and to to limit the query. If you know the IDs of selected items, you can do this:
```
MB_Relationships_API::register( [
    'id'   => 'posts_to_pages',
    'from' => [
        'post_types' => 'post',
        'query_args' => [ 'post__in' => [1,2,3], 'posts_per_page' => 10 ],
    ],
    'to'   => 'page',
] );
```
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May 29, 2019 at 3:46 PM #14765

eazy
Participant

Hi,
thanks for fast reply.

Sadly i can't use the ID's because all 100k posts are related to each other and i can't limit the query.

I need to set this limit to query that populates the select2, instead of showing all options, i need to show/render only the selected option, so the page will load fast because html output will be a lot less.

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May 30, 2019 at 1:46 AM #14776

eazy
Participant

Hi,
the first solution will cause a big problem, when you save the post, all relations will be lost when you save again the post.

Then i found a bug, if you try to order the connected posts, when you reload a page, it will go back to its original order, in database all seems fine, but on frontend no.

To replicate this issue, create some related posts

Test1
Test2
Test3

-> save -> reload page -> move Test3 to first position -> save -> reload page
you will see the order is resetted

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May 30, 2019 at 2:43 PM #14778
Anh Tran
Keymaster
Hmm, looks like the disabled elements won't be submitted when submitting the form.

I think both issues (disable selection and limit the query) can be done like this:
- Make an extra query to get the current selected options (do it by making a SQL query directly to the database). With this, you get the IDs of the connected posts.
- Set the post__in for query_args in the relationship meta box. So the query only get the selected items.
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May 31, 2019 at 1:24 AM #14786
eazy
Participant
Hello, so i tried but it's not working, here the code i put into functions.php:
```
add_action('mb_relationships_init', function () {

    $currentPostId = 86323; //how do i get this?
    global $wpdb;
    $filteredIds = [];
    $results = $wpdb->get_results($wpdb->prepare('SELECT * FROM wp_mb_relationships WHERE wp_mb_relationships.to = %s', $currentPostId));
    foreach($results as $result){
        $filteredIds[] = $result->from;
    }

    MB_Relationships_API::register(array(
        'id' => 'episodes_to_series',
        'from' => array(
            'type' => 'post',
            'post_type' => 'episode',
            'admin_column' => true,
            'meta_box' => [
                'context' => 'advanced',
                'title' => 'Serie'
            ]
        ),
        'to' => array(
            'type' => 'post',
            'post_type' => 'serie',
            'meta_box' => [
                'context' => 'advanced',
                'title' => 'Episodes'
            ],
            'query_args' => [ 'post__in' => $filteredIds], //not working
        ),
    ));
});
```
how do i get $currentPostId ? i tried with $post but without success
why $filteredIds is not working?

I also tried with hard-coded array instead of filteredIds, but nothing

Also, the bug i mentioned on #14776? Some fix is coming soon?

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June 3, 2019 at 2:52 AM #14807

eazy
Participant

Hi, any help on how i get this done?

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June 4, 2019 at 10:50 AM #14826
Anh Tran
Keymaster
Hi @easy,

The working code here: https://pastebin.com/qKA2uYWL

There are 2 notes:
- I added the code to get the current post ID
- Query args are set for the current post type, so the param should be in the from part instead of to
I also optimize the query a little bit.

I'm checking the bug with reordering. Thanks for your feedback.

Updated: I've checked the reorder bug and it seems to be the browser cache. Pressing Ctrl-F5 to reload the page without cache will fix this.

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June 10, 2019 at 2:49 AM #14895

eazy
Participant

Thanks for the support, actually this works for now. Optimal choise would be ajax for both selects, inside "to" and "from" posts. But for now i'm ok with this solution.

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