up vote2down votefavorite
 

i have an array as follows

      'topic' => 
  array (
    'id' => 13,
    'title' => 'Macros',
    'content' => '<p>Macros. This is the updated content.</p>
',
    'created_at' => '2014-02-28 18:36:55',
    'updated_at' => '2014-05-14 16:42:14',
    'category_id' => '5',
    'tags' => 'tags',
    'referUrl' => '',
    'user_id' => 3,
    'videoUrl' => '',
    'useDefaultVideoOverlay' => 'true',
    'positive' => 0,
    'negative' => 1,
    'context' => 'macros',
    'viewcount' => 60,
    'deleted_at' => NULL,
  )

I would like to use this array and convert/cast it into the Topic Model . Is there a way this can be done.

thanks

 
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4 Answers  正确答案

up vote4down voteaccepted

Try creating a new object and passing the array into the constructor

$topic = new Topic($array['topic']);
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Second time in as many days , you have helped me . thanks once again ! :) – Gagan May 14 '14 at 18:38
up vote2down vote

Here is a generic way to do it, not sure if there is a Laravel-specific method -- but this is pretty simple to implement.

You have your Topic class with its properties, and a constructor that will create a new Topic object and assign values to its properties based on an array of $data passed as a parameter.

class Topic
{

    public $id;
    public $title;

    public function __construct(array $data = array())
    {
        foreach($data as $key => $value) {
            $this->$key = $value;
        }
    }

}

Use it like this:

$Topic = new Topic(array(
    'id' => 13,
    'title' => 'Marcos',
));

Output:

object(Topic)#1 (2) {
  ["id"]=>
  int(13)
  ["title"]=>
  string(6) "Marcos"
}
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Just checked the documentation, as long as your class extends Eloquent, you can use @TheShiftExchange's answer. My example pretty much shows what his answer does. – Sam May 14 '14 at 17:58
up vote1down vote

It seems that you have data of an existing model there, so:

  1. First, you can use that array to fill only fillable (or not guarded) properties on your model. Mind that if there is no fillable or guarded array on the Topic model you'll get MassAssignmentException.
  2. Then manually assign the rest of the properties if needed.
  3. Finally use newInstance with 2nd param set to true to let Eloquent know it's existing model, not instantiate a new object as it would, again, throw an exception upon saving (due to unique indexes constraints, primary key for a start).

.

$topic = with(new Topic)->newInstance($yourArray, true);
$topic->someProperty = $array['someProperty']; // do that for each attribute that is not fillable (or guarded)
...
$topic->save();

To sum up, it's cumbersome and probably you shouldn't be doing that at all, so the question is: Why you'd like to do that anyway?

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@deczo.. I am working with queues . ideally I would like to pass the model to the queue, but when I pass the model to the queue , its not working. when I am passing it as an array everything works – Gagan May 14 '14 at 18:40
   
I think serializing is the way to go with that. Model utilizes magic method __wakeup for unserializing, what would do the job for you. Not sure how serialized object is going to work with queues though. And mind that new Topic($array) is not going to work as expected, like stated in my answer. – Jarek Tkaczyk May 14 '14 at 18:53
   
Well , I know what you meant as soon as i tried the code. You are right the id is getting populated , but the isdirty is false which means that the update is going to fail. but i will have to follow your second approach then.. to manually populate the properties which will be a huge pain because of the risk missing of some properties when newer ones are implemented. – Gagan May 14 '14 at 19:01
   
Yes, it will be a pain in the very well known place ;) I highly suggest examining possibility of serializing it instead. – Jarek Tkaczyk May 14 '14 at 19:04
   
Can you please pass me some more information regarding this __wakeup please. It seems i cannot find anything related to this . Must be my inability to read the laravel docs. thanks – Gagan May 14 '14 at 19:12
up vote0down vote

I would likely create the new instance of the object and then build it that way, then you can actually split some useful reusable things or defaults into the model otherwise what's the point in pushing an array into a model and doing nothing with it - very little besides for normalization.

What I mean is:

$topic = new Topic();
$topic->id = 3489;
$topic->name = 'Test';

And the model would simply be a class with public $id;. You can also set defaults so if you had like resync_topic or whatever property, you can set it as 0 in the model rather than setting 0 in your array.

 
 

来自 http://stackoverflow.com/questions/23661677/laravel-convert-an-array-to-a-model