What prevents me from adding a row with foreign key value? - php

Question

1452 Cannot add or update a child row: a foreign key constraint fails (`bpr`.`trips`, CONSTRAINT `trips_driver_user_id_foreign` FOREIGN KEY (`driver_user_id`) REFERENCES `users` (`id`) ON DELETE CASCADE)
is the error.
Adding a row, manually, through MySQL works fine. If I do it through my application - nope.
The id that I am trying to insert is correct (it exists and is an integer). I checked the foreign keys and stuff, everything looks fine. I don't know what the problem might be...
Some code:
$input = Input::all();
Trip::create([
'route_from' => $input['route_from'],
'route_to' => $input['route_to'],
... adding other stuff ...
'driver_user_id' => Auth::user()->id
]);
When I var_dump(Auth::user()->id) I do get correct int number, which is the correctly corresponding ID of the certain user.
in the Trip model:
protected $hidden = [
'id'
];
protected $fillable = [
'route_from',
'route_to',
...
'driver_user_id'
];
public function Trip()
{
return $this->belongsTo('User', 'driver_user_id', 'id');
}
in the User model:
public function Trips()
{
return $this->hasMany('Trip');
}

Answer 1

I have the gut feeling the attributes are guarded. Your code seems correct, however the error you receive originates from the database. Could you try it like this and see if it works:
$trip = new Trip;
$trip->unguard();
$trip->fill([
'route_from' => $input['route_from'],
'route_to' => $input['route_to'],
... adding other stuff ...
'driver_user_id' => Auth::user()->id
]);
$trip->save();
Using the create method on the model makes it difficult to debug what is happening.