I have M-to-M morphToMany relationship:
User::class has morphToMany Building::class through buildable table (Many Buildings can have many Users and many Users can have many Buildings)
Building::class is used morphToMany with many classes
building_id | buildable_type | buildable_id
1 | App\Models\User| 1
1 | App\Models\Car | 1
Each Building hasMany Floor::class
How can I select $user->floors and have a list with every floor that applies to the user?
I know I can select $user->building->floors, what if I want to write a direct relationship?
class User extends Model {
public function floors()
{
return $this->hasManyThrough(
Floor::class,
"buildable"
);
}
}
Related
I need to create a relationship between user and many stores. I have created a three models
Store Model
id name email phone info
1 xyz xyz#gmail.com 9329292922 Small Store
2 abc abc#gmail.com 9494949449 Some Store
User Model
id name email
1 ewd ewd#gmail.com
2 xcv xcv#gmail.com
User_Store
user_id store_id
1 1
1 2
What does the user_store model contain relations whether it is belongstoMany or hasmany?
You can use belongsToMany relationship
In your Store model define a method
public function users() {
return $this->belongsToMany(Users::class, 'user_store', 'user_id', 'store_id');
}
In your Users model define a method
public function stores() {
return $this->belongsToMany(Stores::class, 'user_store', 'user_id', 'store_id');
}
Looks to me like you want a simple many-to-many relationship.
For this you only need two models User and Store, you only need StoreUser if you want to do something special with the pivot table otherwise it is unnecessary.
The following would be the Laravel way:
Table structure
stores
id
name
email
phone
info
users
id
name
email
store_user
user_id
store_id
Laravel excepts the pivot table to be called store_user, you can read more about it here:
To define this relationship, three database tables are needed: users,
roles, and role_user. The role_user table is derived from the
alphabetical order of the related model names, and contains the
user_id and role_id columns.
Model structure
class User extends Model
{
public function stores()
{
return $this->belongsToMany(Store::class);
}
}
class Store extends Model
{
public function users()
{
return $this->belongsToMany(User::class);
}
}
I am trying to make many to many relationships b/w three table I don't know how to make that please confirm me my relationship correct or not.
Project table
id | name
user table
id | name
project_assign
id | user_id | project_id
User Model
public function project_assign()
{
return $this->belongsToMany('App\Project_assign','project_assign','user_id','id');
}
project_assign Model
public function user()
{
return $this->belongsToMany('App\User','Project_assign','user_id','id');
}
Project Model
public function project_assign()
{
return $this->belongsToMany('App\Project_assign','project_assign','project_id','id');
}
you don't need to make a relation in project_assign model. only Project and User will have relation,
Project Model
public function users(){
return $this->belongsToMany('App\User','project_assign','project_id','user_id');
}
User Model
public function projects(){
return $this->belongsToMany('App\Project','project_assign','user_id','project_id');
}
In controller you can get like this
User::with('projects')->get();
Project::with('users')->get();
Hello I have two models User and Car and a pivot table user_car which has two columns user_id and car_id, the combination of the two columns is always unique. Any user can have many cars and one car is assigned to only one user
In the User model I have this
public function cars()
{
return $this->belongsToMany('App\Car', 'user_car');
}
In the Car model I have this
public function user()
{
return $this->belongsToMany(
'App\User', 'user_car', 'car_id', 'user_id'
);
}
$user->cars
returns all the cars for the user as collection which is fine, but I want
$car->user
returns also collection which is only one user. I do not want collection, I want for example to get the user id like this
$car->user->id
Please use laravel default naming convention like alphabetically car_user so that you can follow along. Also it's not a many to many relationship as you've stated in your case it's a one to many relationship. A many to many relationship example something like an author can have many books published and a book can have many authors behind it so in a database table it would be like author_id and book_id in a table
Author_Id | book_id |
1 2
1 1
so in your case it would be like
class User {
public function cars()
{
return $this->hasMany('App\Car');
}
}
make sure you have user_id field in your cars table
and in your Car
class Car{
public function user()
{
return $this->belongsTo('App\User');
}
}
so that you can query it up like
$user = User::first();
$user->car->car_name ;
or when you start w/ car
// to pluck the specific car
$car = Car::find(3);
$car->user->full_name or owner depends upon you
Consider I have the following table structures for tables countries, products and suppliers:
countries
------------------------
id
name
code
product
------------------------
id
name
price
suppliers
------------------------
id
name
A product can be sold in different countries but supplier of that product can be different. With that keeping in mind, I made a relations table to keep track of which supplier is delivering which product in which country:
relations
------------------------
country_id
product_id
supplier_id
Let's say I have a product A which I need to store in country US and CA but the suppliers for these countries are X and Y respectively. The structure would look something like this:
countries
-------------------------------
id | name | code
-------------------------------
1 | United States | US
2 | Canada | CA
product
-------------------------------
id | name | price
-------------------------------
1 | A | 3.99
suppliers
------------
id | name
------------
1 | X
2 | Y
relations
-------------------------------
country_id | product_id | supplier_id
-------------------------------
1 | 1 | 1
2 | 1 | 2
My question is how can I use Eloquent Relationships to this table since many-to-many relationships only work on two tables. Is there any other workaround regarding this? Or is there any other efficient way to implement this scenario?
Thank you for your help.
There is no built-in way to make a relation using three tables. Whenever I encounter something like this myself, the best solution seems to be to make an in-between model that has relations to the three tables.
So in your case, I would create a SupplierProduct that has the relations country, supplier and product.
i have also same scenario class have multiple DaysClassDetails
use this function in your parent model
public function classType()
{
return $this->hasMany('App\DaysClassDetails(middlemodel)');
}
and DaysClassDetails have multiple DaysClassTimeDetails
public function classTime()
{
return $this->hasMany('App\DaysClassTimeDetails(lastchildmodel)');
}
public function classType(){
return $this->belongsTo('App\ManageClass(parentmodel)');
}
As Jerodev suggested, I made an intermediate model SupplierProduct. Instead of making many-to-many relationships, I made one-to-many relationships with SupplierProduct and retrieved data using with functions to retrieve all data related to that record.
This is how my Models look like (database structure is same as described in question):
SupplierProduct.php
namespace App;
use Illuminate\Database\Eloquent\Model;
class SupplierProduct extends Model {
public function country() {
return $this->belongsTo(Country::class);
}
public function product() {
return $this->belongsTo(Product::class);
}
public function supplier() {
return $this->belongsTo(Supplier::class);
}
}
Country.php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Country extends Model {
public function products() {
return $this->hasMany(SupplierProduct::class)->with('product', 'supplier');
}
}
Product.php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Product extends Model {
public function products() {
return $this->hasMany(SupplierProduct::class)->with('country', 'supplier');
}
}
Supplier.php
namespace App;
use Illuminate\Database\Eloquent\Model;
class Supplier extends Model {
public function products() {
return $this->hasMany(SupplierProduct::class)->with('country', 'product');
}
}
I started to learn laravel 1 month ago and I have the next issue.
I have 2 models, user and role and they have M to N relationship, therefore I have 3 tables.
Class Role Class Role_User Class User
=========== =============== ===========
id | name id | user_id | role_id id | name | lastname
1 ADMIN 1 1 1 1 John Rambo
2 AUTOR 2 1 2
3 USER
In the models I have the next code
Model User
public function roles()
{
return $this->belongsToMany(Role::class, 'role_user');
}
Model Role
public function users()
{
return $this->belongsToMany(User::class);
}
I need in my view to list all user with role ADMIN and I dont know waht code I need to put.
public function index($type)
{
$users = Role::all()->roles()->where('name', 'ADMIN');
return view('admin.user.list', compact('users'));
}
Could you help me pls?
Since you want a result composed of users, you need to launch your query on them. And dont forget to run the query with get() (this case), first(), find(..)....
$users = User::whereHas('roles', function ($role) {
$role->where('name','ADMIN');
})->get();
return view('admin.user.list', compact('users'));