Laravel ErrorException, Performing Multiple dynamic drop down - php

Question

I have four tables:
asset_category table(columns 'asset_category_id', 'category'), an assets table(columns 'asset_id','asset_category_id','manufacturer_id', 'department_id'),
manufacturers table (columns manufacturers_id, manufacturer) and departments table (columns department_id, department). The asset table columns are linked with the other three table. I'm performing a dynamic drop down in the form to insert into the asset table
Asset.blade.php
<form action="{{url('/insertAsset')}}" method="POST" edata-parsley-validate novalidate>
{{ csrf_field() }}
<div class="form-group">
<label for="userName">Asset ID*</label>
<input type="text" name="asset_id" parsley-trigger="change" required placeholder="Asset ID" class="form-control" id="userName" disabled>
</div>
<div class="form-group">
<label for="userName">Asset Category ID*</label>
<select name="asset_category_id" parsley-trigger="change" required placeholder="Asset Category ID" class="form-control">
<option>Select an Asset Category</option>
#foreach( $asset_categories as $asset_category )
<option value=" {{$asset_category->asset_category_id}}"> {{ $asset_category->category }} </option>
#endforeach
</select>
</div>
<div class="form-group">
<label for="userName">Asset Manufacture ID*</label>
<select name="manufacturer_id" parsley-trigger="change" required class="form-control">
<option>Select a Manufacturer</option>
#foreach( $manufacturers as $manufacturer )
<option value=" {{$manufacturer->manufacturer_id}}"> {{ $manufacturer->manufacturer }} </option>
#endforeach
</select>
</div>
<div class="form-group">
<label for="userName">Department ID*</label>
<select name="department_id" parsley-trigger="change" required placeholder="Department ID" class="form-control" >
<option>Select a Department</option>
#foreach( $departments as $department )
<option value=" {{$department->department_id}}"> {{ $department->department }} </option>
#endforeach
</select>
</div>
<div class="form-group text-right m-b-0">
<button class="btn btn-primary waves-effect waves-light" type="submit">
Submit
</button>
</div>
AssetController
<?php
namespace App\Http\Controllers;
use App\Asset;
use App\Asset_category;
use App\Manufacturer;
use App\Department;
use Illuminate\Http\Request;
class AssetController extends Controller
{
public function asset_category(){
$asset_categories = Asset_category::all();
return view('asset', ['asset_categories' => $asset_categories]);
}
public function manufacturer(){
$manufacturers = Manufacturer::all();
return view('asset', ['manufacturers' => $manufacturers]);
}
public function department(){
$departments = Department::all();
return view('asset', ['departments' => $departments]);
}
}
Web.php
<?php
Route::get('/asset', function (){
return view('asset');
} );
Route::get('/asset', 'AssetController#asset_category');
Route::get('/asset', 'AssetController#department');
Route::get('/asset', 'AssetController#manufacturer');
/*POST */
Route::post('/insertAsset', 'AssetController#add');
When run the application, i get an ErrorException which states:
Undefined variable: asset_categories (View: C:\xampp\htdocs\laravel_app\resources\views\asset.blade.php).
After thorough testing i find out that, just one drop down displays because the laravel routes only one variable from one function among the 3 functions in the web.php and the other two variable from the other functions are not sent to the asset.blade.php. So now i want a way to route the other variables to the asset.blade.php. Please help if you understand it. Thanks in advance.

Answer 1

The first thing is that Laravel will only match the first route with the specific ID and specific type. In these case will only find the first route GET /asset.
To do what I undestand you want. You need to create only one method, that will return the three variables to the view
public function asset(){
$asset_categories = Asset_category::all();
$manufacturers = Manufacturer::all();
$departments = Department::all();
return view('asset', ['asset_categories' => $asset_categories,
'manufacturers' => $manufacturers, 'departments' => $departments]);
}
And only one route
Route::get('/asset', 'AssetController#asset');