Laravel 5.4 image gallery - php

Question

I am building a Laravel web application where I need a dynamic image gallery, I build a backend admin panel where I can add images, I succeed to add and save the images to the database but I can not edit or delete them.
The error is:
ErrorException in UrlGenerationException.php line 17: Missing required parameters for [Route: galleries.update] [URI:
backend/galleries/{gallery}]. (View: /var/www/html/tryout101/resources/views/backend/gallery/edit.blade.php)
This my route code:
<?php
/*backend access*/
Route::group(['prefix' => '/backend'], function() {
/*The route Dashboard main page */
Route::get('/' , 'AdminController#index')->name('dashboard');
Route::resource('galleries' , 'GalleriesController');
});
This the Controller code:
<?php
namespace App\Http\Controllers;
use App\Gallery;
use Illuminate\Http\Request;
use Image;
use Illuminate\Support\Facades\Input;
class GalleriesController extends Controller
{
/**
* Display a listing of the resource.
*
* #return \Illuminate\Http\Response
*/
public function index()
{
$gallery = Gallery::all();
return view('backend.gallery.library', compact('gallery'));
}
/**
* Show the form for creating a new resource.
*
* #return \Illuminate\Http\Response
*/
public function create()
{
return view('backend.gallery.uploadform');
}
/**
* Store a newly created resource in storage.
*
* #param \Illuminate\Http\Request $request
* #return \Illuminate\Http\Response
*/
public function store(Request $request)
{
$gallery = new Gallery();
$this->validate($request, [
'title' => 'required',
'image' => 'required'
]);
$gallery->title = $request->title;
$gallery->description = $request->description;
if($request->hasFile('image')) {
$file = Input::file('image');
$filename = time(). '-' .$file->getClientOriginalName();
$gallery->image = $filename;
$file->move(public_path().'/images/', $filename);
}
$gallery->save();
return $this->create()->with('success', 'Image Uploaded
Successfully');
}
/**
* Display the specified resource.
*
* #param \App\Gallery $gallery
* #return \Illuminate\Http\Response
*/
public function show(Gallery $gallery)
{
//
}
/**
* Show the form for editing the specified resource.
*
* #param \App\Gallery $gallery
* #return \Illuminate\Http\Response
*/
public function edit(Gallery $gallery)
{
if(!$gallery){
return redirect('dashboard')->with(['fail'=>'post not found']);
}
return view('backend.gallery.edit',compact('gallery'));
}
public function update(Request $request, Gallery $gallery)
{
$this->validate($request, [
'title'=>'required|max:120',
'image'=>'required|image|mimes:jpeg,png,jpg,gif,svg|max:2048'
]);
$gallery->title = $request->title;
$gallery->description = $request->description;
if($request->hasFile('image')) {
$file = Input::file('image');
$filename = $file->getClientOriginalName();
$gallery->image = $filename;
$file->move(public_path().'images/', $filename);
}
$gallery->update();
return Redirect()->route('dashboard')->with(['success'=> 'post
successfully updated']);
}
public function destroy(Gallery $gallery)
{
//
}
}
/This is my edit page/
#extends('layouts.backend-master')
#section('styles')
<link rel="stylesheet" href="">
#endsection
#section('content')
#if (count($errors) > 0)
<div class="alert alert-danger">
<strong>Whoops!</strong> There were some problems with your input.
<br><br>
<ul>
#foreach ($errors->all() as $error)
<li>{{ $error }}</li>
#endforeach
</ul>
</div>
#endif
<h1>File Upload</h1>
<form action="{{route('galleries.update')}}" method="post"
enctype="multipart/form-data">
<div class="input-group">
<label for="title">Title</label>
<input type="text" name="title" id="title"/>
</div>
<div class="input-group">
<label for="description">Description</label>
<textarea type="text" name="description" id="description" rows="8">
</textarea>
</div>
<div class="input-group">
<label for="image">Select image to upload:</label>
<input type="file" name="image" id="file">
</div>
<button type="submit" class="btn">Update</button>
<input type="hidden" name="_token" value="{{Session::token()}}">
<input type="hidden" name="gallery" value="{{$gallery->id}}">
</form>
#endsection
#section('scripts')
#endsection

Answer 1

The fact is that the route 'galleries.update' requires a Gallery
Therefore, you should give him which Gallery you want to go to when calling the route function with that route
Thus, I think that changing
route('galleries.update')
into
route('galleries.update', $gallery)
will make everything fine