I'm really confused why I keep getting a null value when retrieving data from my data model.
Here's my model:
class Supplier extends Eloquent {
public function purchase_orders()
{
return $this->hasMany('Purchase_order','supplier_id');
}
}
And my controller:
$purchase_orders = Supplier::find(1)->purchase_orders;
dd($purchase_orders);
This results to NULL.
My Purchase_order table's fields are:
('id','supplier_id','name','status','date')
And my Suppliers table's fields are:
('id','name','email', 'address')
By the help of #hayhorse I discovered that the one causing the issue was the underscore on the name of the class, to solve the issue i just renamed my class from purchase_orders to purchaseOrder and by that i can now user the proper syntax which is:
$purchase_orders = Supplier::find(1)->purchase_orders;
again credits to #hayhorse
Related
I have a Booking model which can have many Service's.
I have defined the relationship in the Booking model like this:
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
use App\Service;
class Booking extends Model
{
/**
* Get the services for the booking.
*/
public function services()
{
return $this->hasMany('App\Service');
}
}
Then in my BookingController I try to get all the services for the current booking like this:
public function create()
{
$services = Booking::find(1)->services;
return view('bookings.create');
}
I keep getting the error:
Trying to get property of non-object
Not sure what I'm doing wrong here. The foreign key relation is all set up fine. I have a booking_id column in the services table which references id on the bookings table.
Any help would be appreciated.
In this particular case the issue is probably that Eloquent can't find a Booking with id == 1.
Booking::find(1); is going to query on the primary key for Booking for 1. If it is not found it will return null. Trying to use that null as an object is giving the "Trying to get property of non-object" error.
If your keys are not the ones generated by the laravel models you can try to specify them:
return $this->hasMany('App\Service', 'foreign_key', 'local_key');
public function create()
{
$services = Booking::find(1)->services;
return view('bookings.create');
}
By seeing your above code: Ensure that you have record with id 1..if it is , check your primary and foreign key .
I am using Laravel 5's belongsToMany method to define related tables using an intermediary pivot table. My application is using the eloquent models Tour and TourCategory. In the Tour Model I have:
namespace App;
use Illuminate\Database\Eloquent\Model;
class Tour extends Model
{
public function cats(){
return $this->belongsToMany('App\TourCategory', 'tour_cat_assignments', 'tour_id', 'cat_id');
}
}
In my controller I am retrieving all the data from the tour table along with the associated category data using Laravel's with method:
$tours = Tour::with('cats')->get();
That all works fine. The problem is that I don't want the category data in its current raw form, I need to first rearrange it. However I cannot overwrite the cats property without unsetting it first:
public function serveTourData(){
$tours = Tour::with('sections', 'cats')->get();
foreach($tours as $tour){
unset($tour->cats); // If I unset first, then it respects the new value. Why do I need to do this?
$tour->cats = "SOME NEW VALUE";
}
Log::info($tours);
}
Can someone explain the logic behind this please?
To override relations on some model, you can use:
public function serveTourData(){
$tours = Tour::with('sections', 'cats')->get();
foreach($tours as $tour){
$tour->setRelation('cats', "SOME NEW VALUE");
}
Log::info($tours);
}
For laravel 5.4 - setRelation
Of course if you are using laravel >= 5.6, you can unset relations by unsetRelation
I want to get column list with Eloquent relation in laravel.
When I use this comman
$columns = Schema::getColumnListing('news');
Result is all fields of news table but I want to get relation fields for CategoryNews table.
News model:
public function NewsCategories()
{
return $this->belongsTo('App\CategoryNews');
}
CategoryNews model:
public function News()
{
return $this->hasMany('App\News');
}
You should be able to do something like this:
$columns = Schema::getColumnListing($news->NewsCategories()->getRelated()->getTable()));
Using getRelated() method you are getting related object for relationship (in your case it's App\CategoryNews) and now using method getTable() you can get table name for this model and you can use this table name for getColumnListing() method.
I have a simple join to make, but I can't do it.
I have a tournament that has a categoryId field in the table.
The table TournamentLevel is a 10 entry table.
So I would like to be able to retrieve level->name with Eloquent.
I tried to do the following:
In Tournament, I tried to define a hasOne relationship:
class Tournament extends Model
{
....
public function level()
{
return $this->hasOne('App\TournamentLevel');
}
But then, Eloquant is looking for tourmanent_id inside of TournamentLevel Table
So I tried the opposite,
In Model TournamentLevel:
class TournamentLevel extends Model
{
...
public function tournament()
{
return $this->belongsTo('App\Tournament');
}
}
And tried to reach :
tournament->level->name
but without success
It seems pretty elementary, but I can't do it... Any idea???
I have a phone_models, phone_problems, and a phone_model_phone_problem pivot table. The pivot table has an extra column 'price'.
PhoneModel:
class PhoneModel extends \Eloquent
{
public function problems()
{
return $this->belongsToMany('RL\Phones\Entities\PhoneProblem')->withPivot('price');
}
}
PhoneProblem:
class PhoneProblem extends \Eloquent
{
public function models()
{
return $this->belongsToMany('PhoneModel')->withPivot('price');
}
}
What I'm trying to do is get the price of a specific phone with a specific problem.
This is how I have it now but I feel like Laravel has a built in Eloquent feature I can't find to do this in a much simpler way:
$model = $this->phoneService->getModelFromSlug($model_slug);
$problem = $this->phoneService->getProblemFromSlug($problem_slug);
all this does is select the specific model and problem from their slug.
then what I do is with those credentials I get the price like so:
$row = DB::table('phone_model_phone_problem')
->where('phone_model_id', '=', $model->id)
->where('phone_problem', '=', $problem->id)
->first();
so now I can get the price like so $row->price but I feel like there needs to be a much easier and more 'Laravel' way to do this.
When using Many to Many relationships with Eloquent, the resulting model automatically gets a pivot attribute assigned. Through that attribute you're able to access pivot table columns.
Although by default there are only the keys in the pivot object. To get your columns in there too, you need to specify them when defining the relationship:
return $this->belongsToMany('Role')->withPivot('foo', 'bar');
Official Docs
If you need more help the task of configuring the relationships with Eloquent, let me know.
Edit
To query the price do this
$model->problems()->where('phone_problem', $problem->id)->first()->pivot->price
To get data from pivot table:
$price = $model->problems()->findOrFail($problem->id, ['phone_problem'])->pivot->price;
Or if you have many records with different price:
$price = $model->problems()->where('phone_problem', $problem->id)->firstOrFail()->pivot->price;
In addition.
To update data in the pivot you can go NEW WAY:
$model->problems()->sync([$problemId => [ 'price' => $newPrice] ], false);
Where the 2nd param is set to false meaning that you don't detach all the other related models.
Or, go old way
$model->problems()->updateExistingPivot($problemId, ['price' => $newPrice]);
And remind you:
To delete:
$model->problems()->detach($problemId);
To create new:
$model->problems()->attach($problemId, ['price' => 22]);
It has been tested and proved working in Laravel 5.1 Read more.
Laravel 5.8~
If you want to make a custom pivot model, you can do this:
Account.php
<?php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Account extends Model
{
public function users()
{
return $this->belongsToMany(User::class)
->using(AccountUserPivot::class)
->withPivot(
'status',
'status_updated_at',
'status_updated_by',
'role'
);
}
}
AccountUserPivot.php
<?php
namespace App;
use Illuminate\Database\Eloquent\Relations\Pivot;
class AccountUserPivot extends Pivot
{
protected $appends = [
'status_updated_by_nice',
];
public function getStatusUpdatedByNiceAttribute()
{
$user = User::find($this->status_updated_by);
if (!$user) return 'n/a';
return $user->name;
}
}
In the above example, Account is your normal model, and you have $account->users which has the account_user join table with standard columns account_id and user_id.
If you make a custom pivot model, you can add attributes and mutators onto the relationship's columns. In the above example, once you make the AccountUserPivot model, you instruct your Account model to use it via ->using(AccountUserPivot::class).
Then you can access everything shown in the other answers here, but you can also access the example attribute via $account->user[0]->pivot->status_updated_by_nice (assuming that status_updated_by is a foreign key to an ID in the users table).
For more docs, see https://laravel.com/docs/5.8/eloquent-relationships (and I recommend press CTRL+F and search for "pivot")