我正在做一个项目。在这个项目中，我想更新名称，网站和图像字段。我希望如果用户选择新的，那么该字段会增加，否则它会保留过去的值。这对我的名字和website_link完全没问题。但我不能像这样看待图像区域。请帮帮我们。 我的控制器是
public function edit($id)
{
if (Auth::check()) {
if (Auth::user()->user_role->role_id == 1) {
$sponsor = Sponsor::where('id', $id)->first();
if (!empty($sponsor)) {
$data = array(
'menu' => 'sponsor',
'sub_menu' => 'all',
'sponsor' => $sponsor
);
return view('backends.sponsors.edit', $data);
} else {
Session::flash('error', 'Try again.');
return redirect();
}
} else {
return redirect('');
}
} else {
return redirect('');
}
}
public function update(Request $request, $id)
{
if (Auth::check()) {
if (Auth::user()->user_role->role_id == 1) {
$sponsor = Sponsor::where('id', $id)->first();
if (!empty($sponsor)) {
$rules = array(
'name' => '',
'website_link' => '',
'logo' => ''
);
$valid = Validator::make($request->input(), $rules);
if ($valid->fails()) {
return redirect('sponsors/edit/' . $sponsor->id)->withErrors($valid)->withInput();
} else {
$sponsor->name = $request->input('name');
$sponsor->website_link = $request->input('website_link');
// $sponsor->logo = $request->input('logo');
$photo = $request->file('logo');
if($photo)
{
$ext = $photo->getClientOriginalExtension();
$fileName = rand(100, 5000000) . '.' .$ext;
$sponsor->logo = 'public/assets/uploads/sponsors/'.$fileName;
$photo->move(base_path().'/public/assets/uploads/sponsors/',$fileName);
} else {
}
if ($sponsor->save()) {
Session::flash('success', 'Area of experience updated successful.');
return redirect('sponsors/all');
} else {
Session::flash('error', 'Try again.');
return redirect('sponsors/edit//' . $sponsor->id);
}
}
} else {
Session::flash('error', 'Try again.');
return redirect('sponsors/all');
}
} else {
return redirect('');
}
} else {
return redirect('');
}
}
我的观看页面是
@extends ('backends.layouts.app')
@section('main')
<main id="main-container">
<div class="content bg-gray-lighter">
<div class="row items-push">
<div class="col-sm-7">
<h1 class="page-heading">
Sponsors <small>That feeling of delight when you start your awesome new project!</small>
</h1>
</div>
<div class="col-sm-5 text-right hidden-xs">
<ol class="breadcrumb push-10-t">
<li><a class="link-effect" href="{{ URL::to('admin/dashboard') }}">Home</a></li>
<li>Sponsor</li>
</ol>
</div>
</div>
</div>
<div class="content">
<div class="block">
<div class="block-header">
<h3 class="block-title">Sponsor</h3>
</div>
<div class="col-md-12">
@if(Session::has('success'))
<div class="alert alert-success">
<strong> {{ Session::get('success') }}</strong>
</div>
@endif
@if(Session::has('error'))
<div class="alert alert-danger">
<strong> {{ Session::get('error') }}</strong>
</div>
@endif
</div>
<div class="clearfix"></div>
<div class="block-content">
<form method="POST" action="{{ (!empty($sponsor->id)) ? URL::to('sponsors/edit/'.$sponsor->id) : '' }}" class="push-10-t" enctype="multipart/form-data">
{{ csrf_field() }}
<div class="form-group{{ $errors->has('name') ? ' has-error' : '' }}">
<div class="form-material floating">
<input type="text" name="name" value="{{ (!empty($sponsor->name)) ? $sponsor->name : old('name') }}" id="name" class="form-control" required >
<label for="name">Company Name</label>
</div>
</div>
<div class="form-group">
<div class="form-material floating">
<input type="text" name="website_link" value="{{ (!empty($sponsor->website_link)) ? $sponsor->website_link : old('name') }}" id="website_link" class="form-control" >
<label for="website_link">Website Link</label>
</div>
</div>
<div class="form-group">
<label for="logo">Logo</label><br/>
<div id="prev" style="display: none" class="col-md-3 thumbnail">
<img id="blah" class="img-responsive">
</div>
<div class="clearfix"></div>
<div class="form-group">
<label for="logo"> <span class="btn btn-primary" value="{{ (!empty($sponsor->logo)) ? $sponsor->logo : old('logo') }}" id="fileName0">Browse</span></label>
<input type="file" name="logo" style="visibility: hidden; position: absolute;" value="{{ (!empty($sponsor->logo)) ? $sponsor->logo : old('logo') }}" id="logo" class="form-control" required>
</div>
</div>
<div class="form-group">
<button type="submit" class="btn btn-primary">Update</button>
</div>
</form>
</div>
</div>
</div>
</main>
<script>
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#blah').attr('src', e.target.result);
}
reader.readAsDataURL(input.files[0]);
}
}
$("#logo").change(function(){
$('#prev').show();
readURL(this);
});
</script>
@endsection
请帮我解决这个问题
答案 0 :(得分：0)
答案是
public function update(Request $request, $id)
{
if (Auth::check()) {
if (Auth::user()->user_role->role_id == 1) {
$sponsor = Sponsor::where('id', $id)->first();
if (!empty($sponsor)) {
$rules = array(
'name' => 'required',
'website_link' => 'required',
'logo' => ''
);
$valid = Validator::make($request->input(), $rules);
if ($valid->fails()) {
return redirect('sponsors/edit/' . $sponsor->id)->withErrors($valid)->withInput();
} else {
$sponsor->name = $request->input('name');
$sponsor->website_link = $request->input('website_link');
$hdLogo = $request->input('hdLogo');
$photo = $request->file('logo');
if(!empty($photo) && !empty($hdLogo)){
$ext = $photo->getClientOriginalExtension();
$fileName = rand(100, 5000000) . '.' .$ext;
$sponsor->logo = 'public/assets/uploads/sponsors/'.$fileName;
$photo->move(base_path().'/public/assets/uploads/sponsors/',$fileName);
}else if(!empty($photo) && empty($hdLogo)){
$ext = $photo->getClientOriginalExtension();
$fileName = rand(100, 5000000) . '.' .$ext;
$sponsor->logo = 'public/assets/uploads/sponsors/'.$fileName;
$photo->move(base_path().'/public/assets/uploads/sponsors/',$fileName);
}else if(empty($photo) && !empty($hdLogo)){
$sponsor->logo = $sponsor->logo;
}
else if(empty($photo) && empty($hdLogo)){
Session::flash('error','Logo is required.');
return redirect()->back();
}
if ($sponsor->save()) {
Session::flash('success', 'Sponsor updated successful.');
return redirect('sponsors/all');
} else {
Session::flash('error', 'Try again.');
return redirect()->back();
}
}
} else {
Session::flash('error', 'Try again.');
return redirect('sponsors/all');
}
} else {
return redirect('');
}
} else {
return redirect('');
}
}
视图文件将是
@extends ('backends.layouts.app')
@section('main')
<main id="main-container">
<div class="content bg-gray-lighter">
<div class="row items-push">
<div class="col-sm-7">
<h1 class="page-heading">
Sponsors <small>That feeling of delight when you start your awesome new project!</small>
</h1>
</div>
<div class="col-sm-5 text-right hidden-xs">
<ol class="breadcrumb push-10-t">
<li><a class="link-effect" href="{{ URL::to('admin/dashboard') }}">Home</a></li>
<li>Sponsor</li>
</ol>
</div>
</div>
</div>
<div class="content">
<div class="block">
<div class="block-header">
<h3 class="block-title">Sponsor</h3>
</div>
<div class="col-md-12">
@if(Session::has('success'))
<div class="alert alert-success">
<strong> {{ Session::get('success') }}</strong>
</div>
@endif
@if(Session::has('error'))
<div class="alert alert-danger">
<strong> {{ Session::get('error') }}</strong>
</div>
@endif
</div>
<div class="clearfix"></div>
<div class="block-content">
<form method="POST" action="{{ (!empty($sponsor->id)) ? URL::to('sponsors/edit/'.$sponsor->id) : '' }}" class="push-10-t" enctype="multipart/form-data">
{{ csrf_field() }}
<div class="form-group{{ $errors->has('name') ? ' has-error' : '' }}">
<div class="form-material floating">
<input type="text" name="name" value="{{ (!empty($sponsor->name)) ? $sponsor->name : old('name') }}" id="name" class="form-control" required >
<label for="name">Company Name</label>
</div>
</div>
<div class="form-group">
<div class="form-material floating">
<input type="text" name="website_link" value="{{ (!empty($sponsor->website_link)) ? $sponsor->website_link : old('name') }}" id="website_link" class="form-control" >
<label for="website_link">Website Link</label>
</div>
</div>
<div class="form-group">
<label for="logo">Logo</label><br/>
<input type="hidden" value="{{ (!empty($sponsor->logo)) ? $sponsor->logo : ''}}" name="hdLogo">
@if(!empty($sponsor->logo))
<div id="prev" class="col-md-3 thumbnail">
<img id="blah" src="{{ url($sponsor->logo)}}" class="img-responsive">
</div>
@else
<div id="prev" style="display: none" class="col-md-3 thumbnail">
<img id="blah" src="{{ (!empty($sponsor->logo)) ? $sponsor->logo : '' }}" class="img-responsive">
</div>
@endif
<div class="clearfix"></div>
<div class="form-group">
@if(!empty($sponsor->logo))
<label for="logo"> <span class="btn btn-primary" value="{{ (!empty($sponsor->logo)) ? $sponsor->logo : old('logo') }}" id="fileName0">Browse</span></label>
<input type="file" name="logo" style="visibility: hidden; position: absolute;" id="logo" class="form-control">
@else
<label for="logo"> <span class="btn btn-primary" value="{{ (!empty($sponsor->logo)) ? $sponsor->logo : old('logo') }}" id="fileName0">Browse</span></label>
<input type="file" name="logo" style="visibility: hidden; position: absolute;" id="logo" class="form-control" required>
@endif
</div>
</div>
<div class="form-group">
<button type="submit" class="btn btn-primary">Update</button>
</div>
</form>
</div>
</div>
</div>
</main>
<script>
function readURL(input) {
if (input.files && input.files[0]) {
var reader = new FileReader();
reader.onload = function (e) {
$('#blah').attr('src', e.target.result);
}
reader.readAsDataURL(input.files[0]);
}
}
$("#logo").change(function(){
$('#prev').show();
readURL(this);
});
</script>
@endsection