[wp-trac] [WordPress Trac] #43874: REST API: Only render fields specific to request when _fields= is used

[WordPress Trac]

#43874: REST API: Only render fields specific to request when _fields= is used
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 Reporter:  danielbachhuber  |       Owner:  (none)
     Type:  defect (bug)     |      Status:  new
 Priority:  normal           |   Milestone:  4.9.6
Component:  REST API         |     Version:
 Severity:  normal           |  Resolution:
 Keywords:                   |     Focuses:  rest-api, performance
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Comment (by danielbachhuber):

 Replying to [comment:3 schlessera]:

 > **Possible way to make the code cleaner - variant B (with yet more code
 churn):**
 >
 > Iterate over the `$fields` and map them to methods:

 Way back in the day, I had a proposal somewhere for a similar abstraction:
 define the `database_attribute` as a part of the schema, and auto-load the
 data from that.

 For now, I think I'll stick with some minor variation of what I already
 have.

 Also, it's worth noting just so it's mentioned: limiting generated
 response data early means less data is passed through to
 `add_additional_fields_to_object()`. This is why I've persisted `id`, in
 the possibility that it's being used to pull other data into the response.

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Ticket URL: <https://core.trac.wordpress.org/ticket/43874#comment:4>
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