Laravel inserting by relationship to composite key table - php

Question

I have these tables currently:
User table
id (primary key), name, email
User Model
protected $fillable = ['name', 'email'];
protected $visible = ['id','name','email'];
//Relationship
public function customAttributes()
{
return $this->hasMany('App\Models\UserAttribute');
}
UserAttribute Table
user_id, attribute_id, value //user_id and attribute_id is a composite key, both foreignkeys acting as primary keys establishing an unique combination
UserAttribute Model
protected $fillable = ['user_id', 'attribute_id','value'];
protected $visible = ['user_id', 'attribute_id','value'];
I'll use the following example to explain the issue:
$user = $this->user->create(['name' => 'admin', 'email' => 'admin#admin.com']);
//This works
$user->customAttributes()->save(new \App\Models\UserAttribute(['user_id' => $user->id, 'attribute_id' => 1, 'value' => 'Just a custom1']));
//This does not work
$user->customAttributes()->create([new \App\Models\UserAttribute(['user_id' => $user->id, 'attribute_id' => 1, 'value' => 'Just a custom1'])]);
I could just repeat the save for every custom that I want since it works, but I'm trying to figure out why create doesn't work.
The error I'm getting when I use create is (and yes, I've checked the record exists in the table that isn't listed here):
Cannot add or update a child row: a foreign key constraint fails (`testdatabase`.`user_attributes`,
CONSTRAINT `user_attributes_attribute_id_foreign` FOREIGN KEY (`attribute_id`) REFERENCES `attributes` (`id`))
This is the query it's trying to execute:
insert into `user_attributes` (`user_id`) values (1)
I'm just curious at why this doesn't work with create, I'm not sure if it's something related to this specific scenario (create to a composite key table by relationship). It's somewhat ignoring the value and attribute_id field in the query that is executing

Answer 1

try this:
$user->customAttributes()->create(['user_id' => $user->id, 'attribute_id' => 1, 'value' => 'Just a custom1']);

Answer 2

customAttributes() already returns you instance of UserAttribute model, you don't need to enject that dependency when you use create() method via that relation
your query should be like below;
$user->customAttributes()->insert([
[
'user_id' => $user->id,
'attribute_id' => 1,
'value' => 'Just a custom1'
],
[
'user_id' => $user->id,
'attribute_id' => 2,
'value' => 'Just a custom2'
],
]);