I have two models:
Categories
CategoriesTranslations
In model categories I writed:
public function getRouteKeyName(){
return 'alias';
}
Column alias belogns model CategoriesTranslations.
How I can return alias from model CategoriesTranslations?
My code is not working.
I tryed:
Add getRouteKeyName on CategoriesTranslations:
public function getRouteKeyName(){
return 'alias';
}
And in Categories add:
public function categoryTranslations() {
return $this->hasOne(CategoriesTranslations::class);
}
public function getRouteKeyName() {
return $this->categoryTranslations->getRouteKeyName();
}
I get error Call to a member function getRouteKeyName() on null When want show category by getRouteKeyName. How fix it?
You must use relationships between Categories and CategoriesTranslations.
In your Categories model:
public function categoriesTranslations()
{
return $this->hasMany(CategoriesTranslations::class);
}
public function getRouteKeyName()
{
$this->categoryTranslations->where('locale', Auth::user()->locale)->first()->getRouteKeyName();
}
Now you can call getRouteKeyName() from any instance of the Categories model and it will pull it from the CategoriesTranslations table.
** The potential fix here was adding in the where() statement and the first() method. Change the Auth::user()->locale to wherever you are storing which locale to use.
Related
I'm trying to create offers and assign them to parent categories, to be more specific i have an Offer model and inside the offer model i have this many to many relationship
public function category() {
return $this->belongsToMany(Category::class);
}
I want the above function to return ONLY the categories which have NULL parent_category which mean they are the parent categories. Is it possible with the above code?
Without knowing the entire scope of your project, I'd suggest one of the following: either change the name of the relation (A) or keep the relation as is and query it when you need it (B).
Option A -
public function childCategory() {
return $this->belongsToMany(Category::class)->whereNull('parent_category');
}
Option B -
public function category() {
return $this->belongsToMany(Category::class);
}
$offer = Offer::with('category')
->whereHas('category' function ($query) {
$query->whereNull('parent_category');
});
public function category() {
return $this->belongsToMany(Category::class)->where('parent_category', null);
}
I have recently found a problem.
I have 2 models, Articles and Users. i have defined the models relationships like this.
User.php
public function articles()
{
return $this->hasMany(Articles::class,'written_by');
}
Article.php
public function writer()
{
return $this->hasOne(User::class, 'id');
}
The problem is the relationship is accessible only whenever reading the article with id 1
url.com/clanek/1
App\User not returning null
But when the url is url.com/clanek/2
Only "null" is given.
change the relation as below.
User.php
public function articles()
{
return $this->hasMany(Articles::class,'written_by','id');
}
and in Article.php it'll be belongsTo
public function writer()
{
return $this->belongsTo(User::class,'written_by','id');
}
You have to change like this
User.php
public function articles(){
return $this->hasMany(Article::class,'written_by','id');
}
Article.php
public function writer(){
return $this-> belongsTo(User::class);
}
These are my tables many-to-many:
products and suppliers, however I need to relate the pivot(product_supplier) to a table called payment_supplier.
Product model
public function suppliers(){
return $this->belongsToMany('App\Supplier');
}
Supplier model
public function products(){
return $this->belongsToMany('App\Product');
}
but I need to relate pivot product_supplier to payment_supplier table just like described on the diagram
In this case, you could use a pivot model.
# Product Model
public function suppliers() {
return $this->belongsToMany(Supplier::class)->using(ProductSupplier::class);
}
# Supplier Model
public function products(){
return $this->belongsToMany(Product::class)->using(ProductSupplier::class);
}
# ProductSupplier Pivot Model
<?php
namespace App;
use Illuminate\Database\Eloquent\Relations\Pivot;
class ProductSupplier extends Pivot
{
public function payment_supplier()
{
return $this->hasMany(PaymentSupplier::class);
}
}
However, doing it like this has a big problem: You CANNOT eager load a pivot's relationships. Not without an override (or a package).
The other way to go about it is using hasManyThrough
# Product Model
public function suppliers()
{
return $this->belongsToMany(Supplier::class)->using(ProductSupplier::class);
}
public function payment_suppliers()
{
return $this->hasManyThrough(PaymentSupplier::class, ProductSupplier::class);
}
# Supplier Model
public function products()
{
return $this->belongsToMany(Product::class)->using(ProductSupplier::class);
}
public function payment_suppliers()
{
return $this->hasManyThrough(PaymentSupplier::class, ProductSupplier::class);
}
This gives you every PaymentSupplier for a single Supplier/Product, so you'll need to apply some kind of filtering.
When I try to get the name of the Category from my product, I discovered I had to use a 'C' rather than a 'c' before it retrieved results. However when I try to get the Supplier name, the lowercase s works just fine. I was wondering what is causing this difference. Also if I dd($var), is the relations field expected to be empty. I assumed it would have something related to the relationships defined in my models.
Blade.php
<td>{{$product->Category->name}}</td>
<td>{{$product->salePrice}}</td>
<td>{{$product->stock}}</td>
<td>{{$product->supplier->company_name}}</td>
Product.php
public function category()
{
return $this->belongsTo('App\Category','category');
}
public function supplier()
{
return $this->belongsTo('App\Supplier','supplier_id');
}
Category.php
public function product()
{
return $this->hasMany('App\Product');
}
Supplier.php
public function product()
{
return $this->hasMany('App\Product');
}
You're missing a _id on your Product model:
public function category()
{
return $this->belongsTo('App\Category','category_id');
}
Or leave empty
public function category()
{
return $this->belongsTo('App\Category');
}
In your Controller
public function index()
{
$products = Product::all()->with('category');
return view('your_view', compact('products'));
}
If you dd the products
In your View you will se that the relation has been loaded because of the
Eager Loading
When accessing Eloquent relationships as properties, the relationship data is "lazy loaded". This means the relationship data is not actually loaded until you first access the property. However, Eloquent can "eager load" relationships at the time you query the parent model.
#foreach($products as $product)
<td>{{$product->category->name}}</td>
<td>{{$product->salePrice}}</td>
<td>{{$product->stock}}</td>
<td>{{$product->supplier->company_name}}</td>
#endforeach
I am working on a classified ads platform and i am having a problem with a relation. Although i think i've set up everything right there is still this issue.
The scenario is this:
I have a model Category (App\Category) with the folowing relations to form the subcategories
class Category extends Model
{
public function parent() {
return $this->belongsTo('App\Category', 'parent_id');
}
public function children() {
return $this->hasMany('App\Category', 'parent_id');
}
public function adverts() {
return $this->hasMany('App\Advert');
}
}
I also have a model Advert (App\Advert) with the following relations
class Advert extends Model
{
public function category() {
return $this->belongsTo('App\Category');
}
public function user() {
return $this->belongsTo('App\User');
}
}
And finally I have a model User (App\Advert) with the following relations
class User extends Authenticatable
{
public function adverts() {
return $this->hasMany('App\Advert');
}
}
I am collecting the adverts in a collection within a controller like this
$adverts = $user->adverts()->with('category')->with('category.parent')->get();
The problem i am facing is when i try to output the adverts and the category they belong along with the corresponding subcategory i am experiencing this issue
Trying to get property of non-object (View:
..\resources\views\user\profile.blade.php)
On the following line
$ad->category->parent->name . ' / ' . $ad->category->name
When i dd the collection i can see all the adverts and the relations together with the category and the subcategory ... but when i try to output it like this i got this error Trying to get property of non-object
Help anyone?
Thanks
I am not sure if this helps anything, but I am posting it as an answer to make the code more readable, thats all. Not expecting any credits ;)
In one of my models I set up the child / parents relationships like this:
/**
* Get the Categories associated with the parent's `id`
*/
public function children()
{
return $this->hasMany('App\Category', 'parent_id', 'id');
}
/**
* Get the parent associated with the Category`s parent_id`
*/
public function parent()
{
return $this->belongsTo('App\Category');
}