如何解决Laravel 7-如何正确显示旧输入？
我试图在将表单输入/值提交给Controller的验证之前，当其验证失败时显示旧的/先前的输入，但是它仅重定向回页面，其中所有输入字段为空或不显示先前的输入。
这是我在store函数（SaleController）中的控制器代码：
public function store(Request $request)
{
$validator = Validator::make($request->all(),[
'invoice_no' => 'required|unique:sales_h|max:255',]);
if($validator->fails()){
//dd($validator);
Toastr::warning('Invoice No. cannot be repeated or blank.','Warning');
return redirect()->back()->withInput($request->all);
}
/* ...... */
}
这是我的视图刀片文件（create.blade.php）的摘要源代码：
<form class="form-horizontal" method = "POST" action = "{{ route('sales.store') }}">
@csrf
<div class="card-body">
@if ($errors->any())
<div class="alert alert-danger">
<ul class="mb-0">
@foreach ($errors->all() as $error)
<li>{{ $error }}</li>
@endforeach
</ul>
</div>
@endif
<div class="form-group row">
<div class="col-md-12">
<div class="alert alert-info alert-dismissible">
<button type="button" class="close" data-dismiss="alert" aria-hidden="true">×</button>
<h5><i class="icon fas fa-info" d></i> Info!</h5>
A sales order is a document generated by the seller upon receiving a
purchase order from a <strong>buyer/customer</strong> specifying the details about the product or service
along with price,quantity,buyer details.
</div>
<strong><font color="red">*</font> Indicates required fields.</strong>
</div>
<div class="col-md-4">
<label for="date" class="col-sm-6 col-form-label">Date <font color="red">*</font></label>
<div class="input-group mb-2 {{$errors->has('date') ? 'has-error' : ''}}" >
<div class="input-group-prepend">
<span class="input-group-text"><i class="far fa-calendar-alt"></i></span>
</div>
<input type="text"
class="form-control"
id="date"
name = "date"
autocomplete="off"
value="{{ old('date') }}"
required>
</div>
</div>
<div class="col-md-4">
<label for="invoice_no" class="col-sm-6 col-form-label">Invoice No. <font color="red">*</font></label>
<div class="input-group mb-2">
<div class="input-group-prepend {{$errors->has('invoice_no') ? 'has-error' : ''}}">
<span class="input-group-text"><i class="fas fa-hashtag"></i></span>
</div>
<input type="text"
class="form-control"
id="invoice_no"
name = "invoice_no"
maxlength = "15"
value="{{ old('invoice_no') }}"
onkeyup="this.value=this.value.replace(/[^\d]/,'')"
required>
</div>
</div>
<div class="col-md-4">
<label for="shop_name" class="col-sm-6 col-form-label">Customer Name <font color="red">*</font></label>
<div class="input-group mb-2">
<div class="input-group-prepend {{$errors->has('shop_name') ? 'has-error' : ''}}">
<span class="input-group-text"><i class="fas fa-hashtag"></i></span>
</div>
<input type = "text"
class="form-control"
id="shop_name"
name = "shop_name"
placeholder = "Customer Name"
autocomplete = "on"
value="{{ old('shop_name') }}"
required>
</div>
</div>
</div>
</div>
<div class = "form-group row">
<div class="col-md-12">
<label for = "info" class = "col-md-4 col-form-label"><strong><i class="fas fa-info-circle"></i></strong> Sales Order Information</label>
<div class = "col-sm-12 {{$errors->has('product_information') ? 'has-error' : ''}}">
<textarea name = "product_information"
class = "form-control"
rows = "4"
value="{{ old('product_information') }}"
></textarea>
</div>
</div>
</div>
<div class = "col-md-12 field-wrapper">
<div class = "form-group row">
<div class="col-md-12">
<label for="id_raw_product" class="col-sm-4 col-form-label">Product Name <font color="red">*</font></label>
</div>
<div class="col-sm-3">
<input type="hidden" readonly = "true" class="form-control" id="id_raw_product_1" name = "id_raw_product[]" placeholder = "Product Name" required>
<input type="text"
readonly = "true"
class="form-control"
id="name_raw_product_1"
name = "name_raw_product[]"
value="{{ old('id_raw_product_1') }}"
placeholder = "Product Name">
</div>
<div class="col-sm-2">
<a href = "/transaction/sales/product/popup_media/1"
class = "btn btn-info"
title = "Product"
data-toggle = "modal"
data-target = "#modal-default">Product</a>
</div>
<div class="col-sm-3">
<input type="number"
class="form-control"
id="price_1"
name = "price[]"
value="{{ old('price_1') }}"
placeholder = "Price"
onkeyup="this.value=this.value.replace(/[^\d]/,'')" required>
</div>
<div class="col-sm-2">
<input type="number"
class="form-control"
id="total_1"
name = "total[]"
value="{{ old('total_1') }}"
placeholder = "Quantity"
onkeyup="this.value=this.value.replace(/[^\d]/,'')" required>
</div>
<div class = "col-sm-2">
<a href = "javascript:void(0)" class = "btn btn-primary add_Button" title = "Add Row"><i class = "fas fa-plus"></i></a>
</div>
</div>
</div>
</div>
<!-- /.card-body -->
<div class="card-footer">
<button type="submit" class="btn btn-default float-right" name = "submit_create" id = "submit_create">Submit</button>
</div>
<!-- /.card-footer -->
</form>
解决方法
这样编写您的控制器代码-
public function store(Request $request)
{
$validator = Validator::make($request->all(),[
'invoice_no' => 'required|unique:sales_h|max:255',]);
if($validator->fails()){
return redirect()->back()->withInput()->withErrors($validator->messages()->all());
}
}
并在刀片文件中添加此代码-
@if ($errors->any())
<div class="alert alert-danger">
<ul class="mb-0">
@foreach ($errors->all(':message') as $input_error)
<li>{{ $input_error }}</li>
@endforeach
</ul>
</div>
@endif
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