I want to fetch only the specific column seller_db from seller table with the help of model, but when i used this below code my relationship shows null value, please help me to find my mistake, and how can i fetch selected one field with model using laravel?
here is my User.php file.
User.php
public function sellerDB()
{
$instance = $this->hasOne('\App\Seller', 'user_id', 'id')->select('seller_db');
return $instance;
}
Edit: I made a mistake, I misunderstood your database design, it's necessary add an aditional method to resolve this:
public function seller()
{
return $this->hasOne('\App\Seller', 'user_id', 'id')
}
public function sellerDB()
{
return $this->seller->seller_db;
}
In this case you can call $user->sellerDB() and receive the column seller_db
Related
I have a problem. I want to create a dropdown box with the name's from a table in my database andstore just an id from that name in other table (that id is a foreign key). I will show you my code
//acao model
public function estado() {
return $this->belongsTo('App\Estado');
}
//estado model
public function acao()
{
return $this->hasMany('App\Acao');
}
AcaoController#Create:
public function create()
{
$estado = Estado::pluck('nome', 'id');
return view('Backoffice.acoes.criar_acao', compact('estado'));
}
AcaoController#Store:
$data = Acao::create([
'estado_id' => $data[estado_id],
]);
return redirect()->back();
This way the store doesn´t work and i think that this code doesn´t work with the relationship beetween acao and estado.
Can anyone help me please Thanks
your problem is with Mass Assignment so do this in acao thats has estado_id just add it to your fillable array. add this line tour your model
protected $fillable = ['name','estado_id'];
Suppose I have a Course model like this :
class Course extends Model
{
public $primaryKey = 'course_id';
protected $appends = ['teacher_name'];
public function getTeacherNameAttribute ()
{
$this->attributes['teacher_name'] = $this->teacher()->first()->full_name;
}
public function teacher ()
{
return $this->belongsTo('App\User', 'teacher', 'user_id');
}
}
And in the other hand there is a User model like this :
class User extends Authenticatable
{
public $primaryKey = 'user_id';
protected $appends = ['full_name'];
public function getFullNameAttribute ()
{
return $this->name . ' ' . $this->family;
}
public function course ()
{
return $this->hasMany('App\Course', 'teacher', 'user_id');
}
}
As you can see there is a hasMany relationship between those.
There is an full_name accessor in User model.
Now I want to add a teacher_name accessor to Course model that uses it's teacher relations and gets full_name of teacher and appends to Course always.
In fact I want whenever call a Course model, it's related teacher name included like other properties.
But every time , when call a Course model , I got this error :
exception 'ErrorException' with message 'Trying to get property of non-object' in D:\wamp\www\lms-api\app\Course.php:166
That refers to this line of Course model :
$this->attributes['teacher_name'] = $this->teacher()->first()->full_name;
I do not know how can I solve that and what is problem exactly.
Yikes some interesting answers here.
FYI to those coming after me- getFooAttribute() should return the data, and not modify the internal attributes array.
If you set a new value in the attributes array (that doesnt exist in this model's db schema) and then attempt to save the model, you'll hit a query exception.
It's worth reading up the laravel docs on attribute accessors/mutators for more info.
Furthermore, if you need to access a related object from within the model (like in an accessor) you ought to call $related = $this->getRelation('foo'); - note that if the relation isnt loaded (e.g., if you didnt fetch this object/collection with eager loaded relations) then $this->getRelation() could return null, but crucially if it is loaded, it won't run the same query(ies) to fetch the data again. So couple that with if (!$this->relationLoaded('foo')) { $this->loadRelation('foo'); }. You can then interact with the related object/collection as normal.
$this->attributes['teacher_name'] = $this->teacher()->first()->full_name;
Should be
$this->attributes['teacher_name'] = $this->teacher->full_name;
First thing is that you want to reference the relationship, so loose the brackets (), and because the relationship is belongsTo, you will have one user / teacher returned. So you don't need the first().
We haven't seen your fields but probably you will have to change:
return $this->belongsTo('App\User', 'teacher', 'user_id');
to
return $this->belongsTo('App\User', 'foreign_key', 'other_key');
where foreign_key and other_key are the primary keys that you need to make the join on.
Check this link from the documentation for reference:
https://laravel.com/docs/5.4/eloquent-relationships#one-to-many-inverse
the right way to do this is:
COURSE
public function setTeacherNameAttribute ()
{
$this->attributes['teacher_name'] = $this->teacher->full_name;
}
100% working for me.
I have one to one relationship between Order and Shipment. I have to add the accessor of shipments table column from orders table.
function getOrderNoAttribute()
{
$appendText = "OR100";
if($this->orderShipment()->first()) {
$appendText = $this->orderShipment()->first()->is_shipping === 1 ? "ORE100" : "OR100";
}
return $appendText . $this->attributes['id'];
}
This error is only object data to array use or array data to object data use.
example::
$var->feild insted of $var[feild]
$var[feild] insted of $var->feild
You should use return for accessors . something like this :
public function getTeacherNameAttribute ()
{
return $this->teacher()->first()->full_name ?? '';
}
maybe a course hasn't teacher.
I have 3 tables: orders, codes, events
I want to be able to pull all events that an order has, but there's an intermediary table that acts as a pivot table. I've been trying to use hasManyThrough and belongsToMany (along with withPivot) without any luck.
Examples:
public function events()
{
return $this->belongsToMany('events'); // tried this, fails
return $this->hasManyThrough('events', 'codes'); // tried this, fails
return $this->hasManyThrough('events', 'codes', 'event_id', 'id'); // tried this, fails
}
Any pointers would be great!
That's a belongsToMany setup. First, the first parameter is the name of the related class. Second, since your pivot table doesn't follow the Laravel naming conventions, you need to specify the name of the pivot table in your relationship definition:
public function events()
{
// first parameter is the name of the related class
// second parameter is pivot table name
return $this->belongsToMany(Event::class, 'codes');
}
With this setup, you can do:
// get an order
$order = Order::first();
// has all the events related to an order
$events = $order->events;
There are many ways to do this. I will show a one you can get it done.
In Order.php model
public function codes(){
return $this->has('App\Http\Code');
}
In Code.php model
public function orders(){
return $this->belongsTo('App\Http\Order');
}
public function events(){
return $this->hasMany('App\Http\Event');
}
In Event.php model
public function codes(){
return $this->belongsTo('App\Http\Code');
}
Then in you Controller, call them to get required data.
In your case you can do it like below:
$orders = Order::with(['codes' => function($q){
$q->with('events');
})->get();
May be you can get them with nested manner(not sure about this because i didn't tried before posting):
$orders = Order::with('codes.events')->get();
put return $orders; in your controller to see the query.
Enjoy!
I'm just getting started with Laravel so please forgive any noobness.
I have a User and Order model, a user has many orders:
# Inside User model
public function orders()
{
$this->hasMany('Order');
}
# Inside Order
public function user()
{
return $this->belongsTo('User');
}
// Not sure if this is upsetting anything (also in Order)
public function products()
{
return $this->belongsToMany('Product');
}
So I think I have the above right.
But when I do this:
$users = User::with('orders')->find(1);
return $users;
I get Call to a member function addEagerConstraints() on null.
However, if I do it the other way around, it works great:
$orders = Order::with('User')->get();
return $orders;
What am I doing wrong / what don't I understand?! Or is my problem bigger than I think?
Database:
The problem is you don't have return for your orders relationship. It should be:
public function orders(){
return $this->hasMany('Order');
}
You should also use your relationships case sensitive. you showed:
$orders = Order::with('User')->get();
is working, but you should rather use
$orders = Order::with('user')->get();
to avoid extra queries to your database in future
For anyone else that runs across this, I was having the same issue, but my problem was that I had the foreign/local keys swapped. Example:
// This is correct for hasX relationships
public function user() {
return $this->hasOne('App\Models\User', 'user_id', 'local_key_user_id');
}
// This is correct for belongsTo relationships
public function user() {
return $this->belongsTo('App\Models\User', 'local_key_user_id', 'user_id');
}
Notice that for hasX relationships, the foreign key is the second parameter, and the local key is the third. However, for belongsTo relationships, these two are swapped.
Probably doesn't answer this particular question but it relates to the title. I had the same issue here is the wrong query
$offer = Offer::with([
'images:name,id,offer_id',
'offer_options:offer_option,value,id,offer_id',
'user:id,name,avatar'])
->select(['id', 'views', 'type', 'status'])
->where('id', $id)->get();
the model look like this
class Offer extends Model {
function user(): BelongsTo {
return $this->belongsTo(User::class);
}
}
The User
class User extends ..... {
function offer(): HasMany {
return $this->hasMany(Offer::class);
}
}
The issue with the query is I was not selecting user_id, i.e in my select function user_id column was not included and that is why I was getting null for user
according to Laravel docs
When using this feature, you should always include the id column and
any relevant foreign key columns in the list of columns you wish to
retrieve.
So the correct query is
$offer = Offer::with([
'images:name,id,offer_id',
'offer_options:offer_option,value,id,offer_id',
'user:id,name,avatar'])
->select(['id', 'views', 'type', 'status','user_id'])
->where('id', $id)->get();
I have an existing table structure I'm trying to model with Eloquent (Laravel 4) which has 3 one to many relationships to the same table. Basically, each unit can have a home location, a current location and a customer's location.
Note, I've simplified this for the question. The unit table has an unitid, and a homeid, currentid and customerid. Each of homeid, currentid and customerid is a foreign key in the mysql database to the location table on the locationid. The location table also has a name field.
In my Unit model, I have
public function home() { return $this->belongsTo('Location', 'homeid', 'locationid'); }
public function current() { return $this->belongsTo('Location', 'currentid', 'locationid'); }
public function customer() { return $this->belongsTo('Location', 'customerid', 'locationid'); }
In my Location model I have
public function homes() { return $this->hasMany('Unit', 'homeid', 'locationid'); }
public function currents() { return $this->hasMany('Unit', 'currentid', 'locationid'); }
public function customers() { return $this->hasMany('Unit', 'customerid', 'locationid'); }
Now, in my Units controller I have
$units = Unit::with(['home','current','customer'])->paginate(10);
return View::make('units.index')->with('units',$units);
In units.index view I can refer to
foreach ($units as $unit) {
...
$unit->home->name //<-- this works
$unit->current->name //<-- this doesn't
$unit->customer->name //<-- neither does this
...
}
As fas as I can tell from the documentation, I've done everything right. Why would the first FK work, but neither of the two others?
Edit: the error given on the lines marked as not working (when uncommented) is
"Trying to get property of non-object"
The models are correct, thanks #deczo for pointing out the obvious.
The error was mine - not checking for null on the relations before trying to reference the related records.
I.E. $unit->current->name needed to be is_null($unit->curent)?'':$unit->current->name
A stupid PEBKAC error :-)
--Quog