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drupal 8 rest api: get allowed values for list field

chaixdev
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chaixdev Published in 2018-01-12 15:44:20Z

I am not a drupal dev, and i know next to nothing of php specifically. That said, I am developing a new interface for an existing drupal website and we will continue to use drupal in headless mode using the rest api while we migrate to a better long term solution.

Exposing custom content types be pretty straightforward for the most part, but one aspect is giving me a headache: it seems impossible to expose the list of allowed values in a list field (e.g. list of decimals, integers or text). Ideally, there would be a way to query the drupal api for a given field name, returning a list of possible values for that field.

The closest I've gotten is through the entity rest extra module found here.

but while it exposes a ton of info on the fields, even default value for the list field, the allowed values are not there.

Is there a way to expose the allowed values list in the restful api?

Since the module I found is so close to what I need, would it be easily implemented by custom patching my drupal php code? where should I look for clues?

thanks in advance

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