i'm trying to get all the lead_id inside my pivot table but i can't make it work.
controller:
$levels = Level::all();
$levels->lead()->attach('lead_id');
return $levels;
Model Level:
public function lead(){
return $this->belongsToMany(Lead::class, 'level_students')->withPivot('level_id', 'lead_id');
}
Model Lead:
public function level(){
return $this->belongsToMany(Level::class, 'level_students')->withPivot( 'lead_id', 'level_id');
}
If you mean all lead_id of a Level, then you can use pluck().
$level->lead->pluck('lead_id');
I'm not really sure what you are trying to achieve because it seems that you want to retrieve all lead_id associated with any Level. But if that is the case, then you can create a model for the pivot table (e.g. LevelLead) and use distinct() or with Query Builder:
$leadIds = DB::table('level_students')->select('lead_id')->distinct()->get();
If you want to get the referenced table's column (e.g. leads table's name column) then you can use JOIN. Check Laravel's doc for more options. For example, assuming the table name for Lead is leads, then:
$leads = DB::table('level_students')->join('leads', 'level_students.lead_id', '=', 'leads.lead_id')->select('level_students.lead_id', 'leads.name')->distinct()->get();
Related
There are 3 models:
First (first_id)
Connection (connection_id, first_id, product_id)
Second (second_id, product_id)
I would like to connect the three models together using laravel relationships
First->joined to Connection though first_id
Connection->joined to First through first_id, & joined to Second through product_id
Second -> joined to Connection through product_id
So: First joined to Second through Connection first_id, product_id
Is this possible to do using something like HasManyThrough?
Thanks for your time
On your First model:
public function second () {
return $this->hasManyThrough(
Second::class,
Connection::class,
'product_id', // Foreign key on connection table
'product_id', // Foreign key on second table
'first_id', // Local key on first table
'first_id' // Local key on connection table
);
}
Based on your description the column names should work.
In tinker you can validate if it's hooked up correctly by doing something like First::first()->second.
It depends on what type of relationship Your first model and second model shares as well as what type of relation second and third model shares.
if consider your first model First and second model Second shares a one-to-one relation, as well as Second model and Third models shares one-to-one relationships.
It will be $first->second->third; //no has many through relationship requires
If your First model and Second models shares as hasMany-belongs to relation than you need to use hasManyThrough relationship
example from doc
class Country extends Model
{
public function posts()
{
return $this->hasManyThrough(
'App\Post',
'App\User',
'country_id', // Foreign key on users table...
'user_id', // Foreign key on posts table...
'id', // Local key on countries table...
'id' // Local key on users table...
);
}
}
You can try using nested relationships.
Nested Eager Loading
To eager load nested relationships, you may use "dot" syntax. For example, let's eager load all of the book's authors and all of the author's personal contacts in one Eloquent statement:
$books = App\Book::with('author.contacts')->get();
Book Model:
public function author()
{
return $this->hasOne('App\Author');
}
Author Model:
public function contacts()
{
return $this->hasMany('App\Author');
}
Documentation:
https://laravel.com/docs/5.8/eloquent-relationships
I am learning relationships in Laravel php framework and I am trying to build this query
SELECT * FROM users u INNER JOIN link_to_stores lts ON u.id=lts.user_id INNER JOIN stores s ON lts.store_id=s.store_id WHERE lts.privilege = 'Owner'
I built this in Model
Link_to_store.php
public function store()
{
return $this->belongsTo('App\Store');
}
public function user()
{
return $this->belongsTo('App\User');
}
User.php
public function store_links()
{
return $this->hasMany('App\Link_to_store');
}
Store.php
public function user_links()
{
return $this->hasMany('App\Link_to_store');
}
I tried this query but this only joins user and link_to_store table
$personal_stores = Auth::user()->store_links->where('privilege','=','Owner');
Now I am confused how to join store table too. Can anyone help with this?
Schema is like this
Stores Table
store_id store_name
Users Table
id name
Link_to_stores Table
id store_id user_id privilege
I suppose store_links is actually a pivot table. In this case, you can use belongsToMany(), this will automatically take care of the pivot table.
To do this, in your User model you change the store function to this:
function stores() {
return $this->belongsToMany('App\Store', 'store_links', 'user_id', 'store_id')->withPivot('privilege');
}
Because the primary key of stores is not id, you will have to define this in you Store model with the following line:
protected $primaryKey = 'store_id';
Now to get the stores for a user, you simply call
$stores = Auth::user->stores()->wherePivot('privilege', 'Owner')->get();
I am learning relationships in Laravel php framework and I am trying to build this query
SELECT * FROM users u INNER JOIN link_to_stores lts ON u.id=lts.user_id INNER JOIN stores s ON lts.store_id=s.store_id WHERE lts.privilege = 'Owner'
You are trying to do a join here. You can do a join like this:
$stores = User::join('link_to_stores as lts', 'users.id', '=', 'lts.user_id')->join('stores as s', 'lts.store_id', '=', 's.id')->where('lts.privilege', 'Owner')->get();
But like Jerodev pointed out, it seems like Many to Many relationship might make more sense in your case. The difference is that relationship will actually execute 2 queries (1 for original model, 1 for relationship). It will then attach the related models to the original model (which is extremely handy).
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 a Pivot table thats used to join two other tables that have many relations per hotel_id. Is there a way I can eagerload the relationship that pulls the results for both tables in one relationship? The raw SQL query, works correctly but when using belongsToMany the order is off.
Amenities Pivot Table
id
hotel_id
distance_id
type_id
Distance Table
id
name
Type Table
id
name
RAW Query (This works fine)
SELECT * FROM amenities a
LEFT JOIN distance d ON a.distance_id = d.id
LEFT JOIN type t ON a.type_id = t.id WHERE a.hotel_id = ?
My "Hotels" Model is using belongsToMany like so
public function distance() {
return $this->belongsToMany('Distance', 'amenities', 'hotel_id', 'distance_id');
}
public function type() {
return $this->belongsToMany('Type', 'amenities', 'hotel_id', 'type_id');
}
This outputs the collection, but they are not grouped correctly. I need to loop these into select fields side by side as entered in the pivot table, so a user can select a "type" and the "distance", but the order is off when using the collection. The raw query above outputs correctly.
Hotels::where('id','=','200')->with('distance', 'type')->take(5)->get();
Ok Solved it. So apparently you can use orderBy on your pivot table. Incase anyone else has this issue this is what I did on both relationships.
public function distance() {
return $this->belongsToMany('Distance', 'amenities', 'hotel_id', 'distance_id')->withPivot('id')->orderBy('pivot_id','desc');
}
public function type() {
return $this->belongsToMany('Type', 'amenities', 'hotel_id', 'type_id')->withPivot('id')->orderBy('pivot_id','desc');
}
It's not really a great practice to include other query building steps in the relationship methods on your models. The relationship method should just define the relationship, nothing else. A cleaner method is to apply eager load constraints. (scroll down a bit) Consider the following.
Hotels::where('id', 200)->with(array(
'distance' => function ($query)
{
$query->withPivot('id')->orderBy('pivot_id','desc');
},
'type' => function ($query)
{
$query->withPivot('id')->orderBy('pivot_id','desc');
},
))->take(5)->get();
If you find that you are eagerly loading this relationship in this way often, consider using scopes to keep things DRY. The end result will allow you to do something like this.
Hotels::where('id', 200)->withOrderedDistance()->withOrderedType()->take(5)->get();
P.S. Your models should be singular. Hotel, not Hotels. The model represents a single record.
Solved by using ->withPivot('id')->orderBy('pivot_id','desc');
Posted answer in the question.
I have a table Registrationrequests where I have course_id and user_id and some other field.
$users_id = Registrationrequest::where('course_id', $query_course_user)->where('registered', 1)->get();
From the above query it gives me an array of result. But I need to take the details of these user_id from another table Users. I'm using Laravel. Table models are Registrationrequest and User
How can I get the user details from the above select result? I'm not that good in Joins. Any advice?
Use Eloquent's whereHas method:
$courseId = Request::get('course_id');
$users = User::whereHas('registrationRequests', function($query) use ($courseId)
{
$query->where('course_id', $courseId)->where('registered', 1);
});
This assumes you have set up the proper relationship in your User model. If not, add this method to your user model:
public function registrationRequests()
{
return $this->hasMany('Registrationrequest');
}