How to add data to realative table laravel?

Question

I have model Object with relationship:

 public function category(){
   return $this->hasOne('App\FieldCategoriesValues');
 }

How to add new value to category?

I tried:

$object = new Object();
$object->category()->save(["id" => 4])

It does not work.

You should probably use the create() method instead of save() for saving directly from an assoc array - as described in the docs: laravel.com/docs/5.4/… — techfoobar
– techfoobar, Commented May 4, 2017 at 14:20

Eric Tucker · Accepted Answer · 2017-05-04 18:42:38Z

1

In order to save the relationship the first model needs to be created before creating/saving the second model. You can check for existence of a mode with the $exists attribute.

Also, you pass a model to a relationship's save() method and an array to create().

For example for the parent model:

$object = new Object;
$object->exists; // false
$object->save();
$object->exists; // true

OR

$object = Object::create();
$object->exists; // true

Then you can save the related model as:

$category = new Category(["id" => 4]);
$object->category()->save($category);

OR

$category = $object->category()->create(["id" => 4]);

answered May 4, 2017 at 18:42

Eric Tucker

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2 Comments

Garaman Over a year ago

Can I delete like as: $category = $object->category()->delete(["id" => 4]);

Eric Tucker Over a year ago

Since you're working with a hasOne relationship $object->category will return a model so you can do $object->category->delete();

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