Laravel 关系 hasMany updateOrCreate 数组

Question

I have User model which has relationships hasMany with UserPosition eloquent model:

User model

public function positions()
{
    return $this->hasMany(UserPosition::class);
}

How I can use updateOrCreate method when from request come array of data positions?

Code

$positions = [
    "doctor",
    "developer"
];

$user->positions()->each(function($position) use ($positions, $user) {
    $id = $user->id;
    foreach ($positions as $name) {
        $position->updateOrCreate(['user_id' => $id, 'name' => $name], [
            'name' => $name
        ]);
    }
});

Note: In this example user doesn't has any positions on the table of database

But my code not work. Why?

Answer 1

You are iterating on the existing positions of a user, meaning that if a user has no positions the iteration will never happen. You can iterate along the positions you need to make:

$positions = collect([
    "doctor",
    "developer"
]);

$positions->each(function($position) use ($user) {
        $user->positions()->updateOrCreate(['name' => $position], [
            'name' => $position
        ]);
    }
});

Answer 2

It doesn't work because your running your updateOrCreate() method inside an each iteration which never runs because as you stated in your note "this example user doesn't has any positions on the table of database"

Here your trying to loop through your currently existing positions attached to your user model:

$user->positions()->each()

But that won't run because the user doesn't have any positions at the moment.

I'm guessing you are trying to update the the user's positions, where it is possible that the user already has one or more of those positions associated to him and you don't want to create duplicates, for that you can do this:

$positions = [
    "doctor",
    "developer"
];

foreach($positions as $position) {
    UserPosition::firstOrCreate(['user_id' => $user->id, 'name' => $position]);
}