I'm using Laravel and Eloquent.
I have a courses table and a Pivot table that holds the related courses.
My pivot table named relatedCourses has 2 columns, course1 & course2.
In the above example, Course ID 5 is related with Course ID 7.
$data["course"] = course::where("isActive",1)->with('related')->find(5);
This works and brings ID 7 as related.
If i try
$data["course"] = course::where("isActive",1)->with('related')->find(7) it should bring ID 5 as related, this is what i'm trying to achieve.
My code is like this in the model :
class course extends Model
{
public function category()
{
return $this->hasOne('App\courseCategory',"categoryId");
}
public function related()
{
return $this->belongsToMany('App\Models\course', 'relatedCourses', 'course1', 'course2');
}
}
You can define two relationships for this query.
class course extends Model
{
public function category()
{
return $this->hasOne('App\courseCategory',"categoryId");
}
public function relatedCourses()
{
return $this->belongsToMany('App\Models\Course', 'relatedCourses', 'course1', 'course2');
}
public function originalCourses()
{
return $this->belongsToMany('App\Models\Course', 'relatedCourses', 'course2', 'course1');
}
}
Then you can query your relations,
$data["course"] = course::where("isActive",1)->with('relatedCourses')->find(5);
and
$data["course"] = course::where("isActive",1)->with('originalCourses')->find(7);
To merge both relations you can do like this
$course = course::where("isActive",1)->with('originalCourses', 'relatedCourses')->get();
Hope this will help you.
Related
I have the following Models:
Students
Groups
Assignments
Students and Groups have a many-to-many relationship
Groups to Assignments is a one-to-many relationship
I would like to get a student's assignments using eloquent. My initial thought was to use the hasManyThrough relationship, but that won't work because of the many-to-many relationship between groups and students.
Is there an eloquent solution for this or will I need to write something of my own?
Thanks
Build your models as follows:
// Sample Eloquent Model for Students
class Student extends Model
{
public function groups()
{
return $this->hasMany(Group::class);
}
public function assignments()
{
$assignments = [];
foreach($this->groups as $group)
{
array_push($assignments, ...$group->assignments);
}
return $assignments;
}
}
// Sample Eloquent Model for Groups
class Group extends Model
{
public function students()
{
return $this->hasMany(Student::class);
}
public function assignments()
{
return $this->hasMany(Assignment::class);
}
}
// Sample Eloquent Model for Assignments
class Assignment extends Model
{
public function group()
{
return $this->belongsTo(Group::class);
}
}
And if you want to get students assignments:
$assignments = $student->assignments();
I have 3 tables
bank(id, title),
employee(id, name, bank_id),
payroll(id, employee_id, salary).
Now I want to retrieve bank title of employee_id in payroll table.
I have set model relationships
class Bank extends Model
{
public function employees()
{
return $this->hasMany('App\Employee');
}
}
class Employee extends Model
{
public function bank()
{
return $this->belongsTo('App\Bank');
}
public function payrolls()
{
return $this->hasMany('App\Payroll');
}
}
class Payroll extends Model
{
public function employee()
{
return $this->belongsTo('App\Employee');
}
}
I have tried to retrieve using $payroll->employee->bank->title. But it did not help me
Sorry it was my mistake. some employee ids are not referencing bank. That was why I got error.
I resolved the issue by using isset method to verify reference value set or not.
Thanks.
try to change your code a little bit and try again:
public function bank()
{
return $this->hasOne('App\Bank');
}
Read Laravel Official Documentation
/** We can define the inverse of a hasOne relationship using the belongsTo method: **/
i have two tables
**students :**
id
family_id
name
**family :**
id
father_name
father_civil_id
contact_no
both tables are connected using family_id, i want to get how many Brothers/Sisters each students have(with name of sibling) using eloquent.
can you please help me, with controller/model/view.
Let's say you have a Student and Family model. Then you have several ways to do it.
Here are the two easiest ones I can guess with the information you provided.
Without relationship
Controller
Student::where('family_id', $family_id)->get();
HasMany relationship
Family model
class Family extends Model
{
// Since Laravel will expect your table to be 'families'
protected $table = 'family';
public function students()
{
return $this->hasMany(Student::class);
}
}
Controller
$family = Family::with('students')->inRandomOrder()->first();
$siblings = $family->students;
In Students Model:
public function family() {
return $this->belongsTo('App\Models\Family');
}
public function getSiblings() {
return $this->family->students;
}
So you can call it by your students:
$student->getSiblings();
hi sorry bit of a newbie here but I am have three tables users, profiles, friends. they all have the user_id fields within them and I want fetch all of the fields in one statement using Eloquent and not DB::statement and doing the table joins.
How can I achieve this?
Try this
use the User class and the with method that laravel has to query model relationships
$user = User::with(['profile', 'friend'])->get();
Ensure your models has the correct relationships as follows:
app/models/User.php
public function friend () {
return $this->hasMany('Friend');
}
public function profile () {
return $this->hasOne('Profile');
}
app/models/Profile.php
public function user() {
return $this->belongsTo('User');
}
app/models/Friend.php
public function user() {
return $this->belongsTo('User');
}
use some thing like this:
You should define relations in your models with hasOne, hasMany.
class Review extends Eloquent {
public function relatedGallery()
{
$this->hasOne('Gallery', 'foreign_id', 'local_id');
}
}
class Gallery extends Eloquent {
public function relatedReviews()
{
$this->hasMany('Review', 'foreign_id', 'local_id');
}
}
$gallery = Gallery::with('relatedReviews')->find($id);
Will bring the object Gallery with
$gallery->id
gallery->name
...
$gallery->relatedReviews // array containing the related Review Objects
I have a schema like that:
And now I want to use it in Laravel 4. So far, I could only achieve getting games for certain user, without touching owntype. Code:
public function games() {
return $this->belongsToMany('Game','games_users','owntype_id','games_id')->where('user_id','1');
}
The only thing I'm getting is onwtype_id. How can I add owntype table to the "equasion"?
You can access extra pivot table columns by specifying them through the withPivot function on the relationship function.
Basically I think you want to do this:
class User extends Eloquent {
public function games()
{
return $this->belongsToMany('Game', 'games_users')->withPivot('owntype_id');
}
}
class Game extends Eloquent {
public function users()
{
return $this->belongsToMany('User', 'games_users')->withPivot('owntype_id');
}
}
class Owntype extends Eloquent {
protected $table = 'owntype';
}
// Now you can do:
foreach ($user->games as $game)
{
// Echo each Owntype description.
echo Owntype::find($game->pivot->owntype_id)->description;
}
For the record... I think you might be taking it too far by creating a new table for owntype. Just set the description as a type column on the pivot table. Also make sure that your pivot table is named game_user (singular, alphabetically) and Laravel will know which pivot table to use automatically.
class User extends Eloquent {
public function games()
{
return $this->belongsToMany('Game')->withPivot('type');
}
}
class Game extends Eloquent {
public function users()
{
return $this->belongsToMany('User')->withPivot('type');
}
}
// Now you can do:
foreach ($user->games as $game)
{
// Echo each ownership type.
echo $game->pivot->type;
}
Some more info about working with pivot tables can be founded in the Laravel 4 docs.