I have two Model, School, and Student the relationship is, School has Many Student
//Student Model
public function school()
{
return $this->belongsTo('App\School');
}
and same in School Model the following is the function for relationship
public function student()
{
return $this->hasMany('App\Student');
}
Now I have a show Page I like to display the following information. (school_name,school_code) from the school table and student information all from the Student Table.using show function in student controller if I pass as
public function show($id)
{
$student=Student::find($id);
$school=School::find($id);
return View::make('student.show')->with(['school'=> $school,'student'=>$student]);
}
it gets data from school if school_id ==$id but one school has many students it fails if I click to show a button with an ID of 109, how to write the Join query to get school_code and school_name from schools table.
Not sure why you are using the same $id to getting student and school
public function show($id)
{
$student = Student::find($id);
$school = $student->school; //school of the student
return View::make('student.show')->with(['school'=> $school,'student'=>$student]);
}
Use this code
Your model should be like this
public function students()
{
return $this->hasMany('App\Student');
}
You have to change like this.
$student = Student::find($id);
$school = $student->school;
Since you have the relationship setup already, you could use Eloquent to fetch data for single student with the school that he belongs tos as follow:
public function show($id)
{
$student = Student::with('school')->where('id', $id)->first();
return View::make('student.show')->compact('student);
}
Now you can retrieve data show.blade.php as follow:
#foreach($student as $stud)
<li> {{ $stud->student_name}}</li>
<li> {{ $stud->student_code}}</li>
<li> {{ $stud->->school->school->name}}</li>
<li> {{ $stud->school->school_name }}</li>
#ndforeach
Related
I'am new to laravel and had a hard time for eloquent ORM, I like to retrieve Favourite items from the table with specific user id, but seem I don't find a way to display the data correctly.
I refer and copied the favourite model code from here
Model: Favourite
class Favourite extends BaseModel
{
public function favouritable()
{
return $this->morphTo();
}
}
Model: Course
public function favourites()
{
return $this->morphMany(Favourite::class, 'favouritable');
}
public function myFavourite()
{
return $this->favourites()->where('favor_user', '=', auth()->user()->id);
}
Controller: FavouriteController#index
public function index()
{
$course = new Course();
$myfavs = $course->myFavourite();
//dd($myfavs);
$this->vdata(compact('myfavs'));
return view('front.favorites', $this->vdata);
}
In blade view, but return empty/blank data:
#foreach($myfavs as $myfav)
{{ $myfav->$course_name }}
#endforeach
When i dd($myfavs) it display pretty bunches of data that i couldn't find the data that is stored in the favourites table.
I think you have added the conditions but forgot get the results with one of the methods to do so.
Try :
$myfavs = $course->myFavourite()->get();
Or :
$myfavs = $course->myFavourite()->take(<N>)->get;
Or
::all()
etc. take a look at : https://laravel.com/docs/5.8/eloquent#retrieving-models
I'm having trouble understanding Eloquent relationships.
Say I have four tables with data
Users
id
...
UserCars
user_id
car_id
color_id
Cars
id
make
model
Colors
id
color
Now I understand how to get the UsersCars for a selected user with
User.php Model
public function cars()
{
$this->hasMany(Car::class);
}
I can then get the User's car in to a view with
public function show(User $user)
{
$cars= $user->cars;
return $cars;
}
So say a given user id 1 has 2 cars, I can get get his cars with $user->cars() which gives me something like in the view
{"id":1, "car_id":3, "color_id": 2}
{"id":1, "car_id":10, "color_id": 4}
But what I'm not getting is how to then further get the actual value of the relevant ids. So once I've passed $users->cars() as $cars in my controller to my view I can then get the actual make and model and color of the users car.
Something like
#foreach ($cars as $car)
{{ $car->make }} : {{ $car->model }}
{{ $car->color }}
#endforeach
So once I call $user->cars() I need the something like
{"id":1, "car_id":3, "make" => "Ford", "model" => "Fiesta", "color_id": 2, "color":"red"}
{"id":1, "car_id":10, "make" => "Volkswagon", "model" => "Golf", "color_id": 4, "color":"blue"}
I hope that makes sense and any help is appreciated, thanks.
You can access all that data through relationships. Simply define them and load them as you need. First let's define every basic relationship in your model files
In Users model:
// User.php
public function user_cars()
{
return $this->hasMany(App\UserCar::class);
}
In UserCars model:
// UserCar.php
public function user()
{
return $this->belongsTo(App\User::class);
}
public function car()
{
return $this->belongsTo(App\Car::class);
}
public function color()
{
return $this->belongsTo(App\Color::class);
}
In Cars model:
// Car.php
public function user_cars()
{
return $this->hasMany(App\UserCar::class);
}
With all that defined, you can access the relationships by just calling upon them. The difference between $car->user_cars() and $car->user_car is the returned object.
$car->user_cars() is an instance HasMany object and $car->user_cars is a Collection instance. It's basically the same as writing $car->user_cars()->get() so you want to go with the later most of the time.
Now let's see your controller method. Technically, you can return the $user and access all relationships in the view but every time you do, that's an additional query to the database. It's something you should avoid by getting all the data eager loaded first. Since you're using Route Model Binding to get the $user, you need to use the load() function. You can even load nested relationships, which is exactly what you're looking for.
public function show(User $user)
{
// This tells eloquent to add the nested relationships to your User instance.
$user->load('user_cars.car', 'user_cars.color');
return $user;
}
Next, you can access them in the view just like you wanted
#foreach ($user->user_cars as $user_car)
{{ $user_car->car->make }}
{{ $user_car->car->model }}
{{ $user_car->color->color }}
#endforeach
Read more on the subject https://laravel.com/docs/5.8/eloquent-relationships
Your have incorrectly defined the relationship on the User to Car.
Since the relationship with users and cars are many-to-many you must use belongsToMany() eloquent relationship.
doc => https://laravel.com/docs/5.8/eloquent-relationships#many-to-many
User Model
public function cars()
{
return $this->belongsToMany(Car::class, 'user_cars', 'user_id', 'car_id');
}
Car Model
public function users()
{
return $this->belongsToMany(User:class, 'user_cars', 'car_id', 'user_id');
}
then you can access cars from the user, or users from the car.
I have an Author model and Blog model.
I also set up a table with the author_id and blog_id. The table is called "author_blog".
Below is how I am defining my relationships:
Author Model:
public function blogs()
{
return $this->hasMany('App\Blog', 'author_id');
}
Blog Model:
public function author()
{
return $this->belongsTo('App\Author', 'blog_id');
}
In my view I am trying to do $blog->author->first_name. The first name is a column on the Authors table.
I keep getting
trying to get property on non-object.
Any ideas?
UPDATE:
I have removed the intermediate table and instead put an "author_id" on my blogs table and shortened it as such.
Author Model:
public function blogs()
{
return $this->hasMany('App\Blog');
}
Blog Model:
public function author()
{
return $this->belongsTo('App\Author');
}
In my BlogController, when I define the view, I grab a collection of blogs via $blogs = Blog::all();
In my view I just loop through the blogs to show each individually like...
#foreach ($blogs as $blog)
<div>{{ $blog->author->first_name }}</div>
#endforeach
For one to many relationship you don't need another table to handle your foreign key.
Just add author_id foreign key with your blogs table. then define your relations
like below,
Author Model:
public function blogs()
{
return $this->hasMany('App\Blog', 'author_id');
}
Blog Model:
public function author()
{
return $this->belongsTo('App\Author', 'author_id');
}
view:
before that make sure your query return a valid collection.
#foreach ($blogs as $blog)
<div>#if( $blog->author) {{ $blog->author->first_name }} #endif </div>
#endforeach
For further more details : https://laravel.com/docs/5.8/eloquent-relationships#one-to-many
with belongsToMany relation you can define your middle table(author_blog)
In Author model:
public function blogs()
{
return $this->belongsToMany(Blog::class,'author_blog','author_id','blog_id');
}
author_blog => middle table
author_id => foreignPivotKey
blog_id => relatedPivotKey
i have two tables,
Student table
which have column (id, family_id,name,class,section)
Family table
which have column (family_id, mobile_no, profession)
--
i have created two models.
student model:
class student extends Model
{
}
and
family model
class family extends Model
{
public function student()
{
return $this->hasMany('App\student');
}
}
--
i am able to show all data from student table,
my controller is:
public function index()
{
$finddata = student::orderBy('id', 'asc')->get();
return view('students.index')->with('finddata', $finddata); }
--
what i tried
in family model:
return $this->hasMany('App\students');
what i want;
i want to connect family model with student model..
index page will have all students name only. which i have already done
when i click on student name it should show, all information about particular student, and his family information. right now it's only showing information from student table.
In the student model:
class student extends Model
{
public function family(){
return $this->belongsTo(Family::class,'family_id');
}
}
Then you can access family information in Blade by:
{{$student->family->mobile_no}}
{{$student->family->profession}}
You should better use artisan commands to generate models and controllers, so that you get automatic templates that follow naming conventions, such as uppercase Class names.
You should try this
class student extends Model
{
public function familyId(){
return $this->belongsTo(Family::class,'family_id');
}
}
when you click on student name it will redirect to student/{id}
route
Route::get('student/{id}', 'StudentController#show');
student controller
public function show(Request $request, $id)
{
$student = student::find($id);
return view('student.show')->with('student', $student);
}
student.show.blade file
Mobile no: {{ $student->familyId->mobile_no }}
Profession: {{ $student->familyId->profession }}
I have a users table. The user has possibility to upload a post. The post is saved well to the database. The users can follow each other - so on a pivot table each follower_id has followees_id.
I need to get the posts of the current user followee's . I am kinda messed with getting it from a pivot table.
Here's my code so far:
controller:
protected function get_followee_posts($followee_posts) ////$followee_posts passed from the route.
{
$user = $this->user;
$user->followee()->attach($followee_posts);
$followee_posts = User::find($followee_posts);
}
view:
<div class="following_posts">
<p> Posts from people you're following: <p>
#foreach ($user->follower_id->followee_id->posts as $post)
<form action="/html/tags/html_form_tag_action.cfm" method="post">
<textarea name="comments" id="comments" style="width:96%;height:90px;background-color:white;color:black;border:none;padding:2%;font:22px/30px sans-serif;">
{!! $posts->full_post !!} </textarea>
</form>
#endforeach
route:
Route::get('hub/{followee_posts}','HubController#get_followee_posts')->name('followee_posts');
I am getting an error with the current code saying:
ErrorException in 7340f90cc5faf1a298fcc646b7248b22 line 105:
Trying to get property of non-object
Any help would be lovely. Thank you.
Your not too specific about your schema, but this is how I would go about it.
User Model
class User extends Model
{
protected $table = 'users';
public function posts()
{
return $this->hasMany('Post');
}
public function followers()
{
return $this->hasMany('Follower');
}
}
Follower Model
class Follower extends Model
{
protected $table = 'followers';
public function user()
{
return $this->belongs_to('User');
}
public function posts()
{
return $this->hasMany('Post', 'user_id', 'follower_id');
}
}
Post Model
class Post extends Model
{
protected $table = 'posts';
public function user()
{
return $this->belongs_to('User');
}
}
The followers table would look something like this:
user_id
follower_id
You could then use eloquent method chains to get the posts of a users followers:
// Get Users object with followers and followers posts
// We use with() to eager load relationships
$user = User::with('followers.posts')->find(2);
// Return associative array of post objects
$postsArray = $user->followers->lists('posts');
// Combine posts into a single collection
$posts = (new \Illuminate\Support\Collection($postsArray))->collapse()->toArray();
print_r($posts);