Vague perception of ArrayableTrait::resolveFields() mechanism

[q4ev]

Can someone explain to me why we have ifs in ArrayableTrait::resolveFields()?

To not throw when user requested via RESTful API non-existent fields? Why do we use keys in $this->fields() and $this->extraFields() then? Cause at the moment in current code they'll never pass these if checks.

In the beginning I thought it was designed to use aliases for toArray() function. Like return ["title"=>"name"]; So we receive result array looking like ["title" => <value of the name attribute>].

Please, enlighten me.

P.S. By the way if we have "*" in the fields() method, it'll throw Exception, thou I assume it should not.

[samdark]

You mean this if? That allows two input formats: ['field1', 'field2'] and ['field1' => [...], 'field2' => [...]].

[q4ev]

Ehm, okay. What's supposed to be in [...] then?

[samdark]

https://github.com/yiisoft/yii2/blob/master/framework/base/ArrayableTrait.php#L52

[q4ev]

It wouldn't work for relations. You can't alias them in current code. Sure, you can workaround in callback, but what if you only need rename the result key in the output?