How can i show the classes only for student who is enrolled in a class and i have 2 tables and a pivot table?
Table 1: Home_Students : home_id , home_studid ....
Table 2: Hw_Classes :class_id , class_desc , class_date ....
Pivot table:Hw_StudentClasses :Stclass_id, Stclass_classid, Stclass_studid
So i made a model MySeminarClasses to communicate with the table Hw_StudentClasses and a Controller MySeminarClassesController
I made relations in the model of the other tables belongsToMany
public function Users(){
return $this->belongsToMany('User','home_id');
}
public function SeminarClass(){
return $this->belongsToMany('SeminarClass','class_id');
}
Also in the Controller i did this which im not so sure if its right but i did this from the instructions of the laravel 4.2 documentation
$myclasses = DB::table('Hw_StudentClasses')
->join('Hw_Classes','Hw_StudentClasses.Stclass_classid','=','Hw_Classes.Class_id')
->join('Home_Students','Hw_StudentClasses.Stclass_studid','=','Home_Students.home_studid')
->orderBy('class_date',strtotime('-4 month'))
->get();
Finally in the blade
<tbody>
#foreach($myclasses as $i=>$myclass)
<tr>
<td>{{ $i+1 }}</td>
**<td>{{ link_to_route('class.show',$myclass->Class_desc,$myclass->Class_id) }}</td>**
<td class="text-center">{{ date('j-n-Y G:i',strtotime($myclass->class_date)) }}</td>
<td class="text-center">{{ UserEnroll::where('Stclass_classid',$myclass->Class_id)->count() }}</td>
</tr>
#endforeach
</tbody>
After a 16 hours of struggle ......i aswered my own question ! This query with Auth::user helped me. Show the classes only for every user who is logged in
$id = Auth::user()->home_studid;
$date = date('m-d-Y', strtotime('-4 month'));
$seminars = Seminar::where('Package_Display', 1)
->orWhere('Package_Display', 2)
->orderBy('Package_Name', 'asc')
->get();
$myclasses = DB::table('Hw_StudentClasses')
->join('Hw_Classes','Hw_StudentClasses.Stclass_classid','=','Hw_Classes.Class_id')
->join('Home_Students','Hw_StudentClasses.Stclass_studid','=','Home_Students.home_studid')
->where('Home_Students.home_studid','=',$id)
->orderBy('class_date',strtotime('-4 month'))
->get();
HOPE THIS HELPS SOMEONE ! ^_^
Related
I am newbie to jsTree, I want to use it in my Laravel project.I have department and user table .A department has many users.A user belongs to one department.This is the foreach loop that i tried to show users and departments,but its not with jstree.I coudn't find any information that could help me with this in Laravel.I would appreciate a lot if someone could help me with some information about this.Thanks in advance
#foreach($employees as $employee)
<tr>
<td>{{ $employee->name }}</td>
<td>{{ $employee->department->name}}</td>
</tr>
#endforeach
department.php
{
return $this->hasMany(Employee::class);
}
employee.php
public function department()
{
return $this->belongsTo(Department::class);
}
I have two models
Item:
protected $fillable = [
'code',
'name',
'uom'
];
public function recipe()
{
return $this->belongsTo('App\Recipe');
}
Recipe:
protected $fillable = [
'recipecode',
'itemcode',
'qty'
];
public function item()
{
return $this->hasMany('App\Item');
}
In migration I have:
public function up()
{
Schema::table('recipes', function (Blueprint $table) {
$table->foreign('itemcode')->references('code')->on('items');
});
}
In RecipesController I have:
public function index()
{
$recipes = Recipe::all()->sortBy('recipecode');
$items = Item::all();
return view ('recipe.index', compact('recipes', 'items'));
}
I want to see in the view recipecode, itemcode and ItemName, ItemQty etc.
#foreach($recipes as $recipe)
<tr>
<td>{{ $recipe->recipecode }}</td> // this works
<td>{{ $recipe->itemcode }}</td> // this works
<td>{{ $recipe->item->name }}</td> // this doesn't work
<td>{{ $recipe->item->uom }}</td> // this doesn't work
<td>{{ $recipe->item->qty }}</td> // this doesn't work
</tr>
#endforeach
What should I do in order to see 'name' and 'uom' columns from Items table? I think there is a problem with relations...
First, $recipe->item->name does not work as you expected because $recipe->item is a collection of App\Item, not an App\Item model instance. That's because you have set the relationship to be "hasMany"
Second, please read more about eager loading. What you're doing now are multiple queries. That's the N+1, for each recipe you are querying the database to get the items. You do not need to do that, as it's not performant at all. Use Recipe::with('item')->sortBy('recipecode')->get().
Now, keep in mind that $recipe->item is not a single item, but a collection of items that belong to that Recipe. You'll probably have to work a bit on your table to display multiple items for one Recipe.
Since you are using hasMany you must follow naming convention in naming function
public function items()
{
return $this->hasMany('App\Item');
}
In RecipesController you can eager load.
$recipes = Recipe::with('items')->sortBy('recipecode')->get();
Read documentation here: https://laravel.com/docs/master/eloquent-relationships
Also to show it in your blade
#foreach($recipes as $recipe)
<tr>
<td>{{ $recipe->recipecode }}</td> // this works
<td>{{ $recipe->itemcode }}</td> // this works
#foreach($recipe->items as $item)
<td>{{ $item->name }}</td>
#endforeach
</tr>
#endforeach
Other answers share why you can't directly use $recipe->item. However, I think there is a bigger mistake in database design.
The database that you have designed have a one to many relation. Like, one recipe has a lot of items. However, the reverse one that one item has only one recipe seems wrong. You can cook many recipes with one items. I.E. you can make chicken fry and chicken curry with chicken.
The database design should be something like this,
recipes: code, name, uom
items: code, name
item_recipe: item_code, recipe_code, qty
im improving my skills in laravel making a simple challenges web but i stuck on the next problem.
I have the users table with the id, name, mail, etc. The challenges table where i list all the challenges (with columns id, name, body, answer, score) and a third table called "Answers" where i post each try of the users solving a challenge with the columns id, user_id, challenge_id, success (boolean) and score.
Now i'am trying to make a ranking of users with their scores. The problem is to show a sum() of the column 'score' in the table answers where user_id.answers = users.id. So i can get easy the total score for each user.
For now i solved the problem doing this in blade:
#foreach($users as $user)
<tr>
<th>{{ $user->id }}</th>
<td>{{ $user->name }}</td>
<td>Team pindonga</td>
<td>{{ score = DB::table('answers')->where('user_id', $user->id)->sum('score') }} </td> </tr>
#endforeach
works perfectly, but i want to get them by desc score (for now i solved the desc with js but want to get desc order from the eloquent query) and have something like this in the blade:
#foreach($users as $user)
<tr>
<th>{{ $user->id }}</th>
<td>{{ $user->name }}</td>
<td>Team pindonga</td>
<td>{{ $team->score }} </td> </tr>
#endforeach
I was thinking about solve it with accessors doing something like this:
public function getScoreAttribute($value)
{
return $this->groupBy('user_id')->where('user_id', '=', $value)->sum('score');
}
also i have a relationship belongsTo in the answers modle to users and a hasMany in the users to answers. But i'm not sure of how pass the results to blade. Tried in tinker:
>>> \App\Answer::find(1)->score;
=> "3400"
>>> \App\Answer::find(2)->score;
=> "3400"
>>> \App\Answer::find(5)->score;
=> "3400"
allways getting the sum of the id = 1. And with $user->score; in the blade foreach i got a '0'.
Using the relationship with Blade would be {{ $user->answers->sum('score') }}. No accessor needed.
For sorting I would use the sortByDesc collection method.
$users = User::get();
$users = $users->sortByDesc(function ($user) {
return $user->answers->sum('score');
});
I think this is what you're looking for. It takes a while to get used to Eloquent ORM :-)
foreach($users as $user){
print $user->answers->sum('score');
}
https://laravel.com/docs/5.6/queries#aggregates
I have three Tables & corresponding models:
Table ------ Model
papers ------ Paper
paper_stocks ------ PaperStock
paper_stock_amounts ------ PaperStockAmount
Paper contains diff. types of paper.
PaperStock contains different places where these papers can be stored
PaperStockAmount contains the paper id, the stock id and the amount, to determine how many of paper A are in stock B.
Now I want to check outgoing from the paper how manyy are in each stock. Therefore Im doing this in my view:
#foreach($papers as $paper)
#foreach($paper->paperStockAmount as $ps)
<tr>
<td>{{ $ps->stock->name }}</td>
<td>{{ $ps->amount }}</td>
</tr>
#endforeach
#endforeach
This should show every type of paper and in which stocks along with the amount they are in.
However this is the error:
SQLSTATE[42000]: Syntax error or access violation: 1066 Not unique table/alias: 'paper_stock_amounts' (SQL: select `paper_stock_amounts`.*, `paper_stock_amounts`.`id` as `pivot_id`, `paper_stock_amounts`.`amount` as `pivot_amount` from `paper_stock_amounts` inner join `paper_stock_amounts` on `paper_stock_amounts`.`id` = `paper_stock_amounts`.`id` where `paper_stock_amounts`.`id` in (1, 2))
The relationships are defined like this:
Paper
class Paper extends Model
{
public function paperStockAmount()
{
return $this->belongsToMany('App\PaperStockAmount', 'paper_stock_amounts')->withPivot('amount');
}
}
PaperStockAmount
class PaperStockAmount extends Model
{
public function paper()
{
return $this->hasOne('App\Paper', 'id', 'paper_id');
}
public function stock()
{
return $this->hasOne('App\PaperStock', 'id', 'stock_id');
}
}
Why doesn't this work?
You've defined M-M Relationship between paper & paper_stock.
i.e. If you are fetching paperStockAmount from $paper, then you would get paper_stock results with the pivot column amount.
You should do it like this:
#foreach($papers as $paper)
#foreach($paper->paperStockAmount as $paper_stock)
<tr>
<td>{{ $paper_stock->name }}</td>
<td>{{ $paper_stock->pivot->amount }}</td>
</tr>
#endforeach
#endforeach
Use pivot to fetch the pivot column named - amount
Hope this helps!
I am not sure but it looks your relation from Paper to PaperStockAmount is has-many, so your relation should be as:
Paper
class Paper extends Model
{
public function paperStockAmount()
{
return $this->belongsToMany('App\PaperStockAmount');
}
}
Then your view code will work.
OR
If the relation between from Paper and PaperStock is many-to-many then your relation should be as:
Paper
class Paper extends Model
{
public function paperStockAmount()
{
return $this->hasMany('App\PaperStock', 'paper_stock_amounts')->withPivot('amount');
}
}
Then in your view, it can be accessed as: (taking from #saumya answer)
#foreach($papers as $paper)
#foreach($paper->paperStockAmount as $paper_stock)
<tr>
<td>{{ $paper_stock->name }}</td>
<td>{{ $paper_stock->pivot->amount }}</td>
</tr>
#endforeach
#endforeach
I'm getting trouble in getting the data from foreign key .
already make relation between 2 tables, but still error gave me this "Trying to get property of non-object"
this is my models
public function tourism()
{
return $this->belongsTo('App\Models\Tourism','tourism_id');
}
this is my controller
$ratings = Ratings::orderBy('rating','desc')->get();
$ratings = $ratings->take(6);
and this is my blade
<tbody>
#if($ratings)
#foreach($ratings as $data)
<tr>
<td class="center">{{$data->id}}</td>
<td class="center">{{$data->tourism_id->nama}}</td>
<td class="center">{{$data->rating}}</td>
</tr>
#endforeach
#endif
</tbody>
thanks
Try
<td class="center">{{$data->tourism->nama}}</td>
EDIT
This situation occurs when you trying get nama property.
But tourism_id it's just an integer, am I right?
First of all,for accessing related model you should use you relationship method(tourism) instead of FK field(tourism_id).
Then you should check are there any related model in tourims() or not. For this purpose i recommend you use ternary operator, so your line should be something like:
<td class="center">{{$data->tourism->first() ? $data->tourism->first()->nama : 'No tourism'}}</td>
Assuming you already have this controller and the model relationship as above:
function ratingsView() {
$ratings = Ratings::orderBy('rating','desc')->get();
$ratings = $ratings->take(6);
return View('rating')->with('ratings',$ratings);
}
In your views,
<tbody>
#if($ratings)
#foreach($ratings as $data)
<tr>
<td class="center">{{$data->id}}</td>
<td class="center">{{$data->tourism()->first()->nama}}</td>
<td class="center">{{$data->rating}}</td>
</tr>
#endforeach
#endif
</tbody>
Make sure your rating table have id, rating as well as tourism_id attributes and your tourism table have name attribute as well as of course there is data in both tables.
You definitely need to check the the availability of the data and handle it accordingly. But that is different issue
in your controller use it like this:
$ratings = Ratings::orderBy('rating','desc')->take(6)->get();