Modify Meta Box fields after Post has been parsed/initialized - Meta Box

This topic has 1 reply, 2 voices, and was last updated 2 years ago by Long Nguyen.

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October 30, 2022 at 4:28 AM #38892

Johannes Gross
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It looks like fields are added through the rwmb_meta_boxes filter before the post request as been parsed. So $post is not initialized.

Is there a way to add or modify fields after $post has been parsed/loaded? E.g. to modify the std, options, value or description?

Since every code (incl. custom database queries or API calls) in rwmb_meta_boxes runs whether it is needed or not it can slow down the site. If we could conditionally add them based on e.g. the queried post_type, it would speed it up.

Thank you!

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October 30, 2022 at 2:42 PM #38898

Long Nguyen
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Hi Johannes,

It is not possible because the post object is initialized at a hook later than init. The filter hook rwmb_meta_boxes run at the init hook with priority 20. If you want to create some conditions before registering the meta box, you can use some WordPress built-in functions like get_option().
Or use the supported extension MB Include Exclude to load a meta box (field group) based on some condition https://docs.metabox.io/extensions/meta-box-include-exclude/

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