[wp-trac] [WordPress Trac] #56483: Weird oneOf behaviour upon validation of post meta value upon GET retrieval via REST API

[WordPress Trac]

#56483: Weird oneOf behaviour upon validation of post meta value upon GET retrieval
via REST API
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 Reporter:  joeyojoeyo12  |       Owner:  (none)
     Type:  defect (bug)  |      Status:  new
 Priority:  normal        |   Milestone:  Awaiting Review
Component:  REST API      |     Version:  6.0.1
 Severity:  major         |  Resolution:
 Keywords:  needs-patch   |     Focuses:  rest-api
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Comment (by anna.bansaghi):

 Hi, I was able to reproduce the response having `null` with your workflow,
 but do not know if the cause is the same as in your case. I have
 misspelled a keyword which was defined with `pattern` in the input meta.
 Would you mind sharing your input meta here?


 So in my case I had inserted an invalid meta with `add_post_meta()`, and
 wanted the fetch it with `REST API`. However `REST API` validates the
 value against the schema, and because it was invalid, so the response was
 `null`.

 One might argue that a detailed error response would be more useful, but a
 better argue would be to use `REST API` for all operations (create, fetch,
 update, delete), so all database operations will be validated against the
 schema.


 So my next try was using `REST API` instead of `add_post_meta()`, and the
 response immediately was an error message with detailed information about
 the misspelled keyword. It was not possible to create a wrong meta at the
 first place!

 As I said before, it is possible that your issue is caused by something
 else! It would be nice :
 - to see your input meta here, so we can rule out the invalid keyword
 issue, and
 - if you could try to use `REST API` for creating the meta, and see what
 would be the response to that.

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Ticket URL: <https://core.trac.wordpress.org/ticket/56483#comment:2>
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