I have a table named project. In this table I have a column named student_id. Model for this table is Project. And I have another table named user. And model name is User. Now I am retrieving all project table details in a page including student_id. Now I want to show user name instead of student_id. I mean I want to show this student name instead of student id. For example if student_id is 10 then I want to print name for that user from user table whose id is 10.
Any one please help.I have read document from laravel. But i don't know why I am not getting the eloquent concept properly.
Define belongsTo() relationship in Project model class:
public function student()
{
return $this->belongsTo(User::class, 'student_id');
}
And use it:
$project->student->name;
Related
I have two models. Business and City.
Business:
id
title
-some columns--
city_id
City:
id
name
How to display the city name, when I get business data to view
I was able to display cities using the laravel voyager lessons
When I want to get it like $business->city_id
If you are using models, you can create a relationship by adding hasOne or hasMany to your model codes.
When you call it from your controller, you can call the relationship you wrote in your model with the 'with' query.
Model
public function city()
{
return $this->hasOne(City::class,'id','cityid');
}
Controller
$business=Business::with('city')->first();
$cityname=$business->city->name;
If you don't use model, you can connect with 'join'
You have 2 options. First, you can get city details on the controller:
Business::with('city')...;
On the blade
$business->city->name;
Other option fetching it on the blade directly. I don't recommend this because of extra database queries.
$business->city()->name;
I have a question about Laravel Eloquent Relations.
I have the following table situation:
Table guests:
id
name
...
Table landing_pages:
id
name
...
A guest can have several landing pages. And a landing page will have multiple guests.
So I thought, I can use a many-to-many relationship there and I created a new table
Table guests_landing_pages:
id
guest_id
landing_page_id
...
I would be able to use this the following way:
In guest Model I can do this, to create the many-to-many relationship:
public function landing_pages()
{
return $this->belongsToMany(\App\Models\LandingPage\LandingPage::class, 'guests_landing_pages','landing_page_id','guest_id');
}
... and the other way round in landing_page model.
But actually the table guests_landing_pages contains more data than just the guest_id and landing_page_id relation.
There are several other fields in it:
Table guests_landing_pages:
id
guest_id
landing_page_id
identifier_token
max_persons
answer
...
My question is now, how can I realize this best. If I would use the many-to-many relation as described above, I will not be able to access the fields in the intermediate table, won't I?
Or will the best solution to this to create a GuestLandingPages model with all the fields and create hasMany relations to/in both?
Laravel Eloquent has features for retrieving intermediate columns.
public function landing_pages()
{
return $this->belongsToMany(\App\Models\LandingPage\LandingPage::class, 'guests_landing_pages','landing_page_id','guest_id')
->withPivot('max_persons', 'answers');
}
I don't understand how to connect three tables in Laravel.
users> id, ...
groups> id, ...
group_user> id_group, id_user
I want to return all groups to me auth()->user()->groups.
Thanks in advance.
According to your explanation, group_user table holds many-to-many relationship between Group and User model. In case of a many-to-many relationship, you actually don't need a GroupMember model. This kind of table which holds many-to-many relationship is called pivot table. Read more from the Official Documentation
The first argument is the Model you are relating to, the second one is the name of the pivot table, and third argument is the foreign key name of the model on which you are defining the relationship, while the fourth argument is the foreign key name of the model that you are joining to
User.php
class User
{
public function groups()
{
return $this->belongsToMany(Group::class,'group_user','id_user','id_group');
}
}
I'd like your input on this.
I have a Customer_table with a field name. I have another table called Reservation_table with a Customer_name field.
How can I relate them in such a way that I'd see all the bookings by the specific customer?
In Reservation_table you should have a field(foreign key) userid in order ta have a user for each reservation.
You can using primary key - foreign key relationship to relate/join those two tables. Also, instead of having a 'Customer_name' field as your FK referring to 'name' field in 'Customer_table' table, it is better to have an id (unique) generated for each customer; This way you can have an efficient way of uniquely identifying and relating customer across tables; can save space on Database side as well. Hope this helps!
If you want to use eloquent you must first define a relationship.
One reservation belongs to a user. Here is how to define the relationships:
Inside the Reservation model:
public function user()
{
return $this->belongsTo('App/User'); //User model
}
To define the inverse you do the following:
Inside User model:
public function reservations()
{
return $this->hasMany('App/Reservation'); // Reservation Model
}
Now you can do the following in your controller:
$reservations = Auth::user()->reservations;
Now you have all reservations by the currently logged in user.
I am not sure if I got the question right so ask away.
I have create a relationship between user and table column, I want show the table list which is belongs to particular user. For example if user_id 1 is logged in the system, the system will only show the information belong to him which is Table 1.
This is my controller code :
public function show(Request $request){
$user_id=Auth::user()->id;
$table= Roundtable::findOrFail($user_id);
return view('users.tables.show')->withTables($table);
}
I know that $table= Roundtable::findOrFail($user_id); is incorrect but I had no idea how to do because I am new for laravel.
If user has just one table and if Roundtable model has user_id you can use this query:
Roundtable::where('user_id', $id)->first();
It will give you user's table or null if table doesn't exist.
Another way to get table is to use relation:
auth()->user()->roundTable;
Well i found the solution, just need to change the code into
$id=Auth::user()->id;
$table= Roundtable::where('user_id',$id)->get();
return view('users.tables.show')->withTables($table);
then the result will return correctly.