Let's say hypothetically I have 3 tables products, product_images, and variants, a product can have multiple images or variants. I have a requirement, for a product to be viewable by another user you need to have at least 4 product images and 3 variants, and then they are considered valid. I want to be able to query all the products that are considered valid without pulling out a collection and having to use a model method to filter, How can I do this?
You can use has query builder method.
Product::has('images', '>=', 4)->has('variants', '>=', 3)->get();
Related
I would like to paginate my results I get from my relationship. I have a products table/controller, a users table/controller and a markedProducts table. However, I don't have a markedProducts table because I don't actually need it. I use this solution to get all marked products of one user in my user model:
public function markedProducts(){
return $this->belongsToMany('App\Product', 'products_marks');
}
My question now is how can I paginate my results and my second question is how can I get the created_at value of each row in my markedProducts table?
Because my solution is only returning the marked products. However, I would like to show the user when he has marked the product.
So far I had this idea:
$markedProducts = DB::table('products_marks')->where('user_id', Auth::id())->orderBy('created_at', 'desc')->paginate(2);
$products = Product::whereIn('id', $markedProducts->lists('product_id'));
However, ->lists() is not a method anymore and I actually don't want to bypass the Laravel methods and I don't want to loop through my pagination to get an array with all product_id's.
Do you guys have any good and performant solution?
Kind regards and thank you!
Auth::user() will return the authenticated user.
And use relationship method markedProducts() to get the query of products.
And then orderBy the column created_at of pivot table.
At last, apply paginate to this eloquent builder.
Auth::user()->markedProducts()->orderBy('products_marks.created_at', 'DESC')->paginate($limit);
I'm working on Laravel 5.8
Let's say we have a table products like this:
id | product_type_id |...
1 |______1_______|...
2 |______2_______|...
3 |______2_______|...
4 |______3_______|...
I would like to know how to get the all the products which "share" a product type.
In other words, I would like to get all the products except those whose product_type_id is unique in the table.
I know who to do it in a foreach loop but I would like to take advantage of the resources of using Laravel.
Thanks in advance.
The Laravel way of doing it would be using Eloquent relationships along with has() and whereHas(), like this:
$products = Product::whereHas('type', function ($builder) {
$builder->whereKey(Type::has('products', '>=', 2)->pluck('id'));
})->get();
I'm assuming you have defined Product and Type models and connected them together:
Product belongsTo Type
Type hasMany Product
If I'm understanding your question correctly you could do something like this.
First, make sure your ProductType model has a products relationship defined.
(I assume it does based on your Products table.)
Then you can query based on a relationship count using the Eloquent model method has.
Example:
ProductType::with('products')->has('products', '>', 1)->get();
The with('products') is optional. It simply grabs the Products at the same time to avoid additional queries. The whereHas method also works but is really only necessary if you need to filter the relationship based on more complex parameters.
You could also use the has/whereHas method inside the Product model using an inverse (ie belongsTo) relationship to get the same thing but inverted. It really depends on how you want the data presented to you.
Example:
Product::whereIn(
'product_type_id',
ProductType::has('products', '>', 1)->pluck('id')
)->get();
To sum it all up the first way will give you:
ProductType => Product
While the second example will give you:
Product => ProductType
See the related Laravel documentation for more info.
Hope that helps!
I have a database with a table articles and a table category.
My table articles have some fields. And one that is category_id and a another orientation.
Categories, in my design, are arranged by orientation. Here is an example
So, I would like to get all category BUT these categories must belong to the right orientation. I want list of all category who have articles with 'web' orientation, by example.
I do not know if it's possible with this architecture and if you understand me.
Any help is welcome
UPDATE : adding the schemas
If you have your models and relations set up, I believe this should do what you want:
$categories = Category::whereHas('articles', function($query) {
$query->where('orientation', 'web')
})->get()
From the Laravel documentation:
If you need even more power, you may use the whereHas and orWhereHas
methods to put "where" conditions on your has queries. These methods
allow you to add customized constraints to a relationship constraint,
such as checking the content of a comment
I'm working on octoberCMS(laravel framework), I have a doubt on retrieving relation model on where clause.
I have fetched a clothing_type record from "clothing type" model based on its primary key "id".
$clothing_type = ClothingType::where('id',post('clothingtype_id'))->where('status','Active')->first();
This "clothing type" model is related with "products" model, the relation is => each clothing type hasMany products.
Every thing works fine; Now my business logic has two cases, one is to get all the products of the clothing type and another is to get the first product of the clothing type. So I have used the $clothing_type->products to get all the products and $clothing_type->products->first() to get the first product.
Now I have to apply a condition for both the cases. The condition is that only the product whose status is "Active" should be fetched, hence
$products = $clothing_type->products->where('status','Active'); and$first_product_detail = $products->first();.
Every thing works as expected but how come the products are fetched without "get()" method. $clothing_type->products->where('status','Active')->get(); Since I'm new to relation I want to know how this works or is this a bad way to get records or improper assumption. But every thing works good.
$clothing_type = ClothingType::where('id',post('clothingtype_id'))->where('status','Active')->first();
if(count($clothing_type->products))
{
$products = $clothing_type->products->where('status','Active');
$first_product_detail = $products->first();
}
You are doing it the correct way. When you access the relationship as an attribute Eloquent automatically retrieves the records.
However, if you access the relationship as a method, you get the query itself, to which you can add your filters:
if(count($clothing_type->products))
{
$products = $clothing_type->products()->where('status','Active')->get();
$first_product_detail = $products->first();
}
This would solve your problems
(documentation is over here (see the first item))
Edit: Also note that the first method is not a method of Eloquent, but from Collection, which is pretty powerful!
Edit2:
I misread the part of your question where you want to know HOW this is possible. Both Eloquent and Collections have a where method. I assume you understand the working of the Eloquent one, but the one from Collection is pretty much the same (see documentation on the Collection where here)
I prefer the Eloquent one myself, because that limits the amount of records that is retrieved from the database. But if you need all the products (even the inactive ones) later on in your code, just use the Collection method to filter the active ones out
There is nothing to be afraid of...
first() and where()
are functions of both Illuminate\Database\Query\Builder as well as Illuminate\Support\Collection and all first does is limit the records to take 1 and then give you the first record. When you use Builder a query is made to get 1 record and 1 you use it on a collection, all records are first get() and then the first of those records is returned.
Here,
When you do,
$clothing_type->products, Laravel gives you a collection of products...
So...
$products is an object of Illuminate\Support\Collection
and
$products->first() calls for the first() function in that class.
Documentation on where and first methods of a collection...
I've been working on a shopping cart application and now I've come to the following issue..
There is a User, a Product and a Cart object.
The Cart table only contains the following columns: id, user_id, product_id and timestamps.
The UserModel hasMany Carts (because a user can store multiple products).
The CartModel belongsTo a User and CartModel hasMany Products.
Now to calculate the total products I can just call: Auth::user()->cart()->count().
My question is: How can I get the SUM() of prices (a column of product) of the products in cart by this User?
I would like to accomplish this with Eloquent and not by using a query (mainly because I believe it is a lot cleaner).
Auth::user()->products->sum('price');
The documentation is a little light for some of the Collection methods but all the query builder aggregates are seemingly available besides avg() that can be found at http://laravel.com/docs/queries#aggregates.
this is not your answer but is for those come here searching solution for another problem.
I wanted to get sum of a column of related table conditionally.
In my database Deals has many Activities
I wanted to get the sum of the "amount_total" from Activities table where activities.deal_id = deal.id and activities.status = paid
so i did this.
$query->withCount([
'activity AS paid_sum' => function ($query) {
$query->select(DB::raw("SUM(amount_total) as paidsum"))->where('status', 'paid');
}
]);
it returns
"paid_sum_count" => "320.00"
in Deals attribute.
This it now the sum which i wanted to get not the count.
I tried doing something similar, which took me a lot of time before I could figure out the collect() function. So you can have something this way:
collect($items)->sum('amount');
This will give you the sum total of all the items.
you can do it using eloquent easily like this
$sum = Model::sum('sum_field');
its will return a sum of fields,
if apply condition on it that is also simple
$sum = Model::where('status', 'paid')->sum('sum_field');
You can pass this as UserModel attribute. Add this code to UserModel.
public function getProductPriceAttribute(){
return $this->cart()->products()->sum('price');
}
I assume something like this:
UserModel has a one to many relationship with a CartModel named cart
CartModel has a one to many relationship with ProductModel named products
And then you can get sum price of the product like this:
Auth::user()->product_price
Since version 8, there is a withSum method on Eloquent, so you could use this.
Auth::user()->withSum('products', 'price')->products_sum_price;
This won't load all products into memory and then sum it up with collection method. Rather it will generate a sub query for the database, so it's quicker and uses less memory.
Also using query builder
DB::table("rates")->get()->sum("rate_value")
To get summation of all rate value inside table rates.
To get summation of user products.
DB::table("users")->get()->sum("products")
For people who just want to quickly display the total sum of the values in a column to the blade view, you can do this:
{{ \App\Models\ModelNameHere::sum('column_name') }}
You can also do it for averages:
{{ \App\Models\ModelNameHere::avg('column_name') }}
Min:
{{ \App\Models\ModelNameHere::min('column_name') }}
Max:
{{ \App\Models\ModelNameHere::max('column_name') }}
To get the Count of a table:
{{ \App\Models\ModelNameHere::count() }}