How to dynamically populate a new post custom field from url? - Meta Box

This topic has 2 replies, 2 voices, and was last updated 1 year, 4 months ago by phillcoxon.

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July 1, 2023 at 3:10 PM #42437

phillcoxon
Participant

Hi,

This is likely a really simple solution but I haven't been able to spot it in the forum posts - I'd appreciate some advice.

I have a "Tramp Log" CPT which records a history of past tramping trips (hiking trips).

One of the custom fields when creating a new "Tramp Log" post is the post_title of a tramp listed in the Tramps CPT.

I want admin users to have the ability to create a new Tramp Log post that pre-populates the name of the Tramp in the new post being created:

https://example.com/wp-admin/post-new.php?post_type=tramp-log&tramp_name=Example Tramp Name

Question:

How can I retrieve the value of the tramp_name URL variable and preapply it to the tramp_name custom field before the create new post page is displayed?

Thanks in advance!

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July 2, 2023 at 11:45 AM #42441
Peter
Moderator
Hello Phill,

You can use the filter hook rwmb_{$field_id}_field_meta to pre-populate value of the field from the URL. For example:
```
add_filter( 'rwmb_tramp_name_field_meta', function ( $value, $field, $saved ) {
    $value = isset( $_GET['tramp_name'] ) ? $_GET['tramp_name'] : $value;
    return $value;
}, 10, 3);
```
Read more about the filter in the documentation https://docs.metabox.io/filters/rwmb-field-meta/

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July 2, 2023 at 12:01 PM #42442

phillcoxon
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Thanks so much!

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