I have a model called unit that has this relationship
/**
* Get the users associated with the unit
*/
public function users()
{
return $this->hasMany('App\Models\User\UserData');
}
In the UserData model there is a column called user_id which I am trying to put in my condition in my query. I am trying to do a query like this
Unit::where('user_id', Auth::id())->first()
but there is no user_id column in the Unit table, only though the users relationship
Ended up doing this
Unit::whereHas('users', function($q) {
$q->where('user_id', Auth::id());
})->first();
Related
I have two models:
Order
Customer
I have customer_id in orders table. Customer details (name, phone, email etc) in customerstable. But I am writing query for orders table.
Now, I want to search with Customer Name on Orders but in Orders table I just have customer_id.
How will I link up with customers table so that I can search with Customer Name. I want to do that with Eloquent.
How is this possible?
There are multiple ways of doing relationship filtering with Eloquent.
You can achieve it with whereHas or using an advanced join / left join query.
I suggest you do a research about Eloquent filtering on Laravel documentation, everything you need for your task should be there.
https://laravel.com/docs/8.x/eloquent-relationships#querying-relationship-existence
https://laravel.com/docs/8.x/queries#advanced-join-clauses
In models define relationships
Customer model
public function orders()
{
return $this->hasMany(Orders::class);
}
Order model
public function customer()
{
return $this->belongsTo(ustomer::class, 'foreign Key', 'id');
}
Then you can call relationships and search what you want
Customer::whereHas('orders')
First you need to create relationship in the orders model, you can use either belongsTo or hasOne relationship.
belongsTo relationship will be like as below
public function customer()
{
return $this->belongsTo(ustomer::class, 'foreign Key', 'id');
}
and the hasOne relationship will be like as below
public function customer()
{
return $this->hasOne(Customer::class, 'foreign_key', 'local_key');
}
The search function will be like as below
public function OrderSearch(Request $request){
try {
/**
* Fetching data with orders relationship
*/
$orders = OrdersModel::with(['customer'])
if(!empty($request->search)){
/**
* Searching the name key inside
* the customer relationship
*/
$orders->where(fn($query)=>
$query->whereHas('customer',fn($query2) =>
$query2->where('name','LIKE','%'.$request->search.'%'));
);
}
/**
* Returning the response
*/
return $orders->get();
} catch (\Throwable $th) {
throw $th;
}
}
Kindly refer the laravel eloquent-relationships documentation : eloquent-relationships
I have a notifications table (and model)
notifications table columns are thus:
id
title
body
is_public
...
I also have a users table (and model)
users table columns:
id
username
...
I also have a pivot notification_user table
columns:
user_id
notification_id
many-to-many relationship is set on both Notification and User models thus:
Notification.php
public function users()
{
return $this->belongsToMany('App\Api\V1\Models\User');
}
User.php
public function notifications()
{
return $this->belongsToMany('App\Api\V1\Models\Notification');
}
Now inside Notification.php I want to set a scope. In the scope I need to get public notifications and the current user's
private notifications in a single SQL query. from my table structure, public notifications are where is_public == 1. Private notifications are associated on the pivot table.
to achieve this, inside my Notification.php, I also have this setup:
public function scopePublicAndPrivate(Builder $query)
{
return $this->public($query)->union($this->private($query));
}
public function scopePublic(Builder $query)
{
return $query->where('is_public', 1);
}
public function scopePrivate(Builder $query)
{
$user = JWTAuth::parseToken()->authenticate(); //using JWT to get a user.
return $user->notifications();
}
Now when I try Notification::publicAndPrivate()->get() inside a controller, I get:
Illuminate\Database\QueryException with message 'SQLSTATE[21000]: Cardinality violation: 1222 The used SELECT statements have a different number of columns (SQL: (select * from `notifications` where `is_public` = 1) union (select * from `notifications` inner join `notification_user` on `notifications`.`id` = `notification_user`.`notification_id` where `notification_user`.`user_id` = 1))
Please I'll appreciate any help with getting this to work or a better solution.
I believe you should change:
return $user->notifications();
to something else, for example:
return $query->where('user_id', $user->id);
or maybe
return $query->whereHas('users', function($q) use ($user) {
$q->where('id', $user->id);
});
This is because in one query you are not using any join and in second you do and you are getting different number of columns for union parts.
I want to use where clause on the another relationship not my current selecting model as below table
table Customer
-------id-----customer_name
Table ModelA
table Customer
-------id-----fk_custome_id
table ModelB
-------id-----fk_ModelA_id
Function in Controller
$data['data'] = customer::with(['modelA','modelA.modelB'])
->where('fk_customer_id', 2)->get();
Customer Model
final function ModalA (){
return $this->hasMany('App\Models\ModelA', 'fk_customer_id', 'id');
}
ModelA Model
final function Modelb (){
return $this->hasMany('App\Models\ModelB', 'fk_modelA_id', 'id');
}
Error:
I will got error as below because select sql don't find the column name fk_customer_id in table customer, So how can I user fk_customer_id (in table ModelA) for where.
You can useYou can use whereHas like:
$data['data'] = customer::with(['modelA','modelA.modelB'])
->whereHas('modelA', function ($query) {
$query->where('fk_customer_id', 2);
})->get();
It's because when you're using with you just eager load constrints but you won't attach it to the main query (of the customer model). So there are two way: one modern with using whereHas or using join queries.
I have four tables
**Articles table**
id
title
body
owner_id
category_id
**Favorite articles table**
id
user_id
article_id
**User table**
id
user_name
user_type
**Category table**
id
category_name
How to get list of favorite articles (article_name,owner_name,category_name) which related to currently logged user from db using laravel eloquent?
Is it possible to do it in single line request? e.g.:
$articles_data=Auth::user()->favorite_articles->article...
EDIT
For the moment i have to use statement below:
$articles_data = FavoriteArticle::where('user_id', Auth::id())->join('articles', 'articles.id', '=', 'favorite_articles.article.id')
->join('users', 'users.id', '=', 'favorite_articles.user_id')
->join('categories', 'categories.id', '=', 'articles.id')
->get()
Which looks a bit complicated and doesn't use eloquent relations.
Completing #zippo_ answer, in the Controller you must reference what tables you want, e.g.
User.php
use Article;
public function article()
{
return $this->hasOne('App\Article');
}
and in the e.g. UserController.php
$user = User::with('article')->get();
EDIT:
if you want to relate User to Article.Category, after create a relation with user and article
Article.php
use Category;
public function category()
{
return $this->hasOne('App\Category');
}
e.g. UserController.php
$user_articles_categories = User::with('article.category')->get();
You can take advantage of laravel eager loading, which are also called as Eloquent relationships.
Eloquent relationships are defined as functions on your Eloquent model classes.
Eg. In Article Model
public function article()
{
return $this->hasOne('App\Model\Category');
}
In this way, you need to define all the relationships in the respective Model classes.
for more info: http://laravel.com/docs/5.1/eloquent-relationships
A Venue has many Subscriptions.
A Subscription has many Subscribers (User).
Theres a pivot table, containing the relation between user_id and subscription_id.
How can I get all Subscribers from a Venue?
I have tried with:
class Venue {
/**
* Members
*/
public function members() {
return $this->hasManyThrough('App\User', 'App\Subscription');
}
}
But it fails with MySQL error:
SQLSTATE[42S22]: Column not found: 1054 Unknown column 'users.subscription_id' in 'on clause' (SQL: select `users`.*, `sub
scriptions`.`venue_id` from `users` inner join `subscriptions` on `subscriptions`.`id` = `users`.`subscription_id` where `
users`.`deleted_at` is null and `subscriptions`.`venue_id` = 1)
How my Subscription model look:
`Subscription`
class Subscription extends Model {
protected $table = 'subscriptions';
/**
* Subscripers
*/
public function subscribers() {
return $this->belongsToMany('App\User');
}
/**
* Venue
*/
public function venue() {
return $this->belongsTo('Venue');
}
}
Simple question: Why are you using a third model for Subscriptions? It sounds like a normal n:m relation between User and Venue, as already written in the comments above.
class User {
public function venues() {
return $this->belongsToMany('App\Venue');
}
}
class Venue {
public function users() {
return $this->belongsToMany('App\User');
}
}
This constellation actually needs three tables, which are (i gave each model a column name):
users
- id
- name
venues
- id
- name
user_venue
- user_id
- venue_id
But to access the relations, you can simply use the Eloquent magic:
// List of all venues (as Venue models) that are in relation with User with id $id
$venues = User::find($id)->venues()->get();
// Returns the alphabetically first user that has a relation with Venue with id $id
$user = Venue::find($id)->users()->orderBy('name', 'asc')->first();
If you need to store additional information in the pivot table (e.g. when the relation has been established), you can use additional pivot fields:
user_venue
- user_id
- venue_id
- created_at
class User {
public function venues() {
return $this->belongsToMany('App\Venue')->withPivot('created_at');
}
}
class Venue {
public function users() {
return $this->belongsToMany('App\User')->withPivot('created_at');
}
}
// Returns the date of the relations establishment for the alphabetically
// first Venue the User with id $id has a relation to
$created_at = User::find($id)->venues()->orderBy('name', 'asc')->first()->pivot->created_at;
I've never tried to do whatever you are trying to do there, because it seems (with the current information) conceptually wrong. I also don't know if it is possible to set up an own model for a pivot table, but I think it should work if the pivot table has an own primary id column. It could probably be helpful if you've a third model that needs to be connected with a connection of two others, but normally that doesn't happen. So try it with pivot tables, like shown above, first.
Alright, I still don't see a good use case for this, but I can provide you a query that works. Unfortunately I wasn't able to get an Eloquent query working, but the solution should be still fine though.
class Venue {
public function members($distinct = true) {
$query = User::select('users.*')
->join('subscription_user', 'subscription_user.user_id', '=', 'users.id')
->join('subscriptions', 'subscriptions.id', '=', 'subscription_user.subscription_id')
->where('subscriptions.venue_id', '=', $this->id);
if($distinct === true) {
$query->distinct();
}
return $query;
}
}
The relation can be queried just as normal:
Venue::find($id)->members()->get()
// or with duplicate members
Venue::find($id)->members(false)->get()