Laravel Eloquent assigning to a model attribute

Question

Id like to overwrite a relationship attribute like the following:

$article['tags'] = $article->tags->pluck('title');
return compact('article');

It fails because it returns the tags attribute as an array of objects instead of an array of title strings. The API consumer needs the data in that form. This also reduces the size of the payload.

My current work around is to add another attribute and unset the original one.

$article['tagged'] = $article->tags->pluck('title');
unset($article['tags']);
return compact('article');

But I wish it was simpler and straightforward.

Why not you just return title from tags relation instead ? — Niklesh Raut
– Niklesh Raut, Commented Apr 24, 2018 at 5:36
@Sohel0415 yours is the simple answer. Maybe add it below for me to accept? — Tim Truston
– Tim Truston, Commented Apr 24, 2018 at 5:52
@C2486 That yields an error - return $this->hasMany('App\Tag')->pluck('title'); // must return a relationship instance. Please provide your example as an answer below — Tim Truston
– Tim Truston, Commented Apr 24, 2018 at 5:57

Sohel0415 · Accepted Answer · 2018-04-24 05:53:45Z

1

Use the relation method tags() to get the title array.

$article['tags'] = $article->tags()->pluck('title');

answered Apr 24, 2018 at 5:53

Sohel0415

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DevK · Accepted Answer · 2018-04-24 05:46:31Z

1

For overriding use setRelation(key, value):

$article->setRelation('tags', $article->tags()->pluck('title'));

^ This assumes you didn't preload the relationship. If you did, just remove the parenthesis from ->tags() (same as in your question: ->tags->pluck('title')).

For unsetting a single relationship, there's no available method. You could use ->setRelations(array) though.

edited Apr 24, 2018 at 5:46

answered Apr 24, 2018 at 5:37

DevK

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