$category = Category::all();
$product = Product::all()->where('category_id', $category->name)->get();
Change category id from its name and link two tables in one in Laravel 5.5.
kindly refer to Laravel documentation regarding setting up relationships:
https://laravel.com/docs/5.5/eloquent-relationships
The relation between Category & Product is one to many, so it will be:
// app/Category.php
public function products()
{
return $this->hasMany(Product::class);
}
You need to return a view and pass the data instead of returning a collection:
return view('some.view', [
$category => Category::all();
$product => Product::where('category_id', $category->name)->get();
]);
https://laravel.com/docs/5.5/views#passing-data-to-views
Also, when you do this:
$product=Product::all()->where('category_id',$category->name)->get();
You're loading all products from DB into memory and then filtering them because all() is executing the query. Do not do this.
Related
I have a model with a relationship with another model, when calling the relationship in the controller it gives me
Exception: Property [products] does not exist on the Eloquent builder instance.
model:
public function products(): HasMany
{
return $this->hasMany(CartProduct::class,'cart_id','id');
}
controller
public function showCartOfAuth()
{
$id =auth()->guard('customers')->user()->id;
$cart = Cart::where('customer_id',$id)->get();
$products = Cart::where('customer_id',$id)->products->get();
$response = [
'cart' => $cart,
'items' => $products
];
return response($response,200);
}
Can you try this, please: Cart::with('products')->where('customer_id',$id)->get();
The way you have implemented requires atleast two database queries.
One: $cart = Cart::where('customer_id',$id)->get();
Two: Cart::where('customer_id',$id)->first()->products; //maybe a third query to fetch the products
For better performance you should
public function showCartOfAuth()
{
$id =auth()->guard('customers')->user()->id;
// Either Option 1
// Possibly 2 database queries, one to fetch the Cart and another to fetch Products for the Cart
$cart = Cart::where('customer_id',$id)->first();
$products = $cart->products;
$response = [
'cart' => $cart,
'items' => $products
];
// OR Option 2
// One database query using eager loading
$cart = Cart::with('products')->where('customer_id', $id)->first();
$response = ['cart' => $cart];
return response($response,200);
}
If you use option 2 from above then instead of $items you can use $cart->products
How to write this code in eloquent method ?
$product = DB::table('products')
->join('purchase', 'products.id', '=', 'purchase.id')
->join('sales', 'purchase.id', '=', 'sales.id')
->select('sales.*', 'purchase.*','products.*')
->get();
Create model Product and add one to many relationship with Purchase in Product model.
public function purchases()
{
return $this->hasMany('App\Models\Purchase');
}
Create model Purchase and add one to many relationship with Sale in Purchase model.
public function sales()
{
return $this->hasMany('App\Models\Sale');
}
Create model Sale.
You can retrieve data using following statement.
$products = Product::with('purchases.sales')->get();
Note: I am assuming the relationship as one to many you can also declare as per your data, also you can define one to many inverse relationship, please refer to laravel docs https://laravel.com/docs/8.x/eloquent-relationships#one-to-many.
You will get purchases and sales data in different key so you can use below syntax to loop over it.
foreach ($products as $product) {
foreach ($product->purchases as $purchase) {
//Purchase data for current product
foreach($purchase->sales as $sale){
//Sale data for current purchase
}
}
}
I am trying to do something I've never done before in Laravel and cannot figure out how to do it.
I have the following code in my Controller:
public function show($id)
{
//Get application for drug
$application = PharmaApplication::where('ApplNo', $id)->first();
//Get all products for given application (i.e. the different quantities and forms drug comes in)
$product = PharmaProduct::where('ApplNo', $id)->get();
foreach($product as $product){
$product->ProductNo;
}
//Get Marketing Status for drug
$marketingStatus = DB::table('pharma_marketing_statuses')
->where('ApplNo', $id)
->where('ProductNo', $product->ProductNo)
->get();
//Lookup marketing status Description
$marketingStatusDescription = PharmaMarketingSatusLookup::where('MarketingStatusID', $marketingStatus->MarketingStatusID);
return view('profiles.drug', compact('application', 'product', 'marketingStatus', 'marketingStatusDescription'));
}
I am trying to accomplish the following:
Get the application for a drug - this part of my code works
Return an array of objects for the products (i.e. 7 products that belong to one application). I can do this but get stuck going to the next part.
Next, I have to use the array of objects and search a table with the following columns: MarketingStatusID, ApplNo, ProductNo. I know how to query this table and get one row, but the problem is I have an array that I need to search. I imagine I have to use a loop but don't know where.
Finally, I use the MarketingStatusID to retrieve the MarketingStatusDescription which I will know how to do.
I am also getting an error message that says:
Class 'App\Http\Controllers\profiles\PharmaMarketingSatusLookup' not found
In my Controller, I have use App\PharmaMarketingStatusLookup; so I am not sure why it is searching the Controllers folder
You have a typo in your class
From PharmaMarketingSatusLookup change to PharmaMarketingStatusLookup
App\Http\Controllers\profiles\PharmaMarketingStatusLookup
USE whereIn
use App\PharmaApplication;
use App\PharmaProduct;
use App\PharmaMarketingSatusLookup;
public function show($id)
{
$application = PharmaApplication::where('ApplNo', $id)->first();
$products = PharmaProduct::where('ApplNo', $id)->get();
$productid = array();
foreach($products as $product){
$productid[] = $product->ProductNo;
}
$marketingStatus = DB::table('pharma_marketing_statuses')
->where('ApplNo', $id)
->whereIn('ProductNo', $productid)
->get();
$marketingStatusDescription = PharmaMarketingSatusLookup::where('MarketingStatusID', $marketingStatus->MarketingStatusID);
return view('profiles.drug', compact('application', 'product', 'marketingStatus', 'marketingStatusDescription'));
}
i have a question about accessing relation in laravel model. I have category model which has relation to translation model and category model(same model/itself - one category can be displayed in other categories using pivot table CategoryToCategory):
category model:
public function childCategories(){
return $this->hasManyThrough('App\Models\Category',
'App\Models\CategoryToCategory',
'id_parent_category',
'id',
'id',
'id_category');
}
public function translation($locale = null)
{
if ($locale == null) {
$locale = \App::getLocale();
}
return $this->hasOne('App\Models\CategoryLanguage', 'id_category', 'id')->where('locale', '=', $locale);
}
Now i take current category + translation + child categories:
$category = Category::with('translation', 'childCategories')->active()->where('id', $id)->first();
And display all childs names:
#forelse($category->childCategories as $category)
{{ $category->translation->name }}
#endforelse
I works but each child category makes another query to get translation(it's not loaded for elements in forelse). So how to load relation "translation" in category model which is foreaching loaded relation?
I could query model CategoryToCategory to get all child categories + load translation for that model and result be the same:
$categories = CategoryToCategory::with('translation')->where('id_parent_category', $id)->get();
And there will be one query for translations. Still i'm curious about using first solution instead query categoryToCategory.
Any ideas?
Have a nice day!
To eager load a distant relationship you can use the dot notation like so:
$category = Category::with('translation', 'childCategories.translations')
->active()
->where('id', $id)
->first();
This is known as "nested eager loading" and is referenced in the docs here:
https://laravel.com/docs/5.8/eloquent-relationships#eager-loading
In the Products table i have the store_id column which connects the product with the store.
In my APIController which i use with Angular i have this return statement. I am returning a collection of products.
return Product::where('category_id', $category->id)
->select(array('id', 'name', 'newprice', 'image',
'store_id', 'link'))
->paginate(20);
My problem is that instead of returning the store_id(from the products table) i want to return the store name, which is NOT stored in the same table. Is there any way to do that?
Is my only option the use of JOIN?
I recommend you do it with Laravel(/Eloquent) relationships like this:
ApiController:
$productFieldArray = ['id', 'name', 'newprice', 'image', 'store_id', 'link'];
$product = Product::where('category_id', $category->id)
->select(productFieldArray)
->paginate(20);
// Get the value you want (I guess it's the name attribute?)
$store = $product->store->name;
Model relationships:
Product.php:
...
public function store() {
return $this->belongsTo('App\Store');
}
...
Store.php:
...
public function products() {
return $this->hasMany('App\Product');
}
...
Edit:
You have to use the with() function in your query to point out your want to receive the store data too. See: Laravel - accessing relationship Models with AngularJS or http://laravel.com/docs/4.2/eloquent#eager-loading.
So you query will be:
Product::with('store')
->where('category_id', $category->id)
->select(productFieldArray)
->paginate(20);