Laravel 5.4 多次上传和插入数据

Question

大家好，提前谢谢大家，首先抱歉，如果我的代码如此混乱，我还在学习^^。 我正在尝试制作具有不同属性的产品以及 3 张不同的图片（制作产品图库）和一张特色图片， 我已成功创建属性和特征图像。 问题出在我无法存储的画廊的 3 张图片上（既不在 DB 也不在图片文件夹中） 我有两个表（product 和 productgallery），它们之间的关系是 hasMany（我使用的是 Laravel 5.4）

这是我运行代码后遇到的错误

SQLSTATE[HY000]: General error: 1364 Field 'product_id' doesn't have a default value (SQL: insert into `product_galleries` (`updated_at`, `created_at`) values (2017-05-13 20:58:20, 2017-05-13 20:58:20))

（对不起我的英语，这肯定会让我更难理解我的问题）

产品控制器

 public function store(UploadRequest $request)
    {
        $product = new Product();
        $product->product_name = $request->product_name;
        $product->product_description = $request->product_description;
        if($request->hasFile('product_preview')) {
          $file = Input::file('product_preview');
          $filename = time(). '-' .$file->getClientOriginalName();
          $product->product_preview = $filename;
          $file->move(public_path().'/images/product-feature', $filename);
        }
        $product->category_id = $request->category_id;
        $product->color_id = $request->color_id;
        $product->size_id = $request->size_id;
        $product->material_id = $request->material_id;
        // $product->fantasia_id = $request->fantasia_id;
        $productgallery = new ProductGallery();
        if($request->hasFile('fileToUpload[]')) {
          $files = Input::file('fileToUpload[]');
          foreach ($request->$files as $photo) {
            $filename = time(). '-' .$photo->getClientOriginalName();
            $productgallery->product_images = $filename;
            $photo->move(public_path().'/images/product-gallery', $filename);
            $productgallery->product_id = 1;
          }
        }
        $product->save();
        $productgallery->save();
        return $this->create()->with('success', 'Uploaded Successfully');
    }

上传请求（FormRequest）

<?php

namespace App\Http\Requests;

use Illuminate\Foundation\Http\FormRequest;

class UploadRequest extends FormRequest
{
    public function authorize()
    {
        return true;
    }

    public function rules()
    {
        $rules = [
          'product_name'  => 'required|max:120',
          'category_id'   => 'required|integer',
          'product_preview' => 'required|image|mimes:jpeg,png,jpg,gif,svg',
        ];
        $fileToUpload = count($this->input('fileToUpload'));
        foreach(range(0, $fileToUpload) as $index) {
            $rules['fileToUpload.' . $index] = 'image|mimes:jpeg,bmp,png|max:2000';
        }
        return $rules;
    }
}

表单的视图

@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>Add a new product</h1>
  <form action="{{route('products.store')}}" method="post" enctype="multipart/form-data">

    <div class="input-group">
      <label for="product_name">Name of the product</label>
      <input type="text" name="product_name" id="product_name"/>
    </div>

    <div class="input-group">
      <label for="product_description">Product Description</label>
      <textarea type="text" name="product_description" id="product_description" rows="8"></textarea>
    </div>

    <div class="input-group">
      <label for="product_preview">Feature Image:</label>
      <input type="file" name="product_preview" id="file">
    </div>

    <div class="input-group">
      <label for="category_id">Category</label>
      <select name="category_id" id="category_id">
        @foreach($categories as $category)
          <option value="{{ $category->id }}">{{ $category->category_name }}</option>
        @endforeach
      </select>
    </div>

    <div class="input-group">
      <label for="color_id">Color</label>
      <select name="color_id" id="color_id">
        @foreach($colors as $color)
          <option value="{{ $color->id }}">{{ $color->color_name }}</option>
        @endforeach
      </select>
    </div>

    <div class="input-group">
      <label for="size_id">Size</label>
      <select name="size_id" id="size_id">
        @foreach($sizes as $size)
          <option value="{{ $size->id }}">{{ $size->size_name }}</option>
        @endforeach
      </select>
    </div>

    <div class="input-group">
      <label for="material_id">Material</label>
      <select name="material_id" id="material_id">
        @foreach($materials as $material)
          <option value="{{ $material->id }}">{{ $material->material_type }}</option>
        @endforeach
      </select>
    </div>

    <div class="input-group">
      <label for="fileToUpload">Product Gallery:</label>
      <input type="file" name="fileToUpload[]" id="fileToUpload" multiple >
    </div>

    <button type="submit" class="btn">Add</button>
    <input type="hidden" name="_token" value="{{Session::token()}}">
  </form>
@endsection

@section('scripts')
@endsection

谢谢

Answer 1

您需要查看 Laravel 关系 API 文档。这是一个阅读更多相关信息的链接Laravel 5.4 Eloquent Relationships

---

解决该问题的快速提示

您应该在您的数据库/迁移文件中添加一个外键
对于迁移，您可以简单地添加

$table->foreign('product_id')->references('id')->on('products');

并将此方法添加到您的产品模型

public function productgallery(){
 return $this->hasMany(Productgallery::class);
}

这是您的 Productgallery 模型

public function product(){
 return $this->belongsTo(Product::class);
}

注意：您仍然需要在请求中填充 product_id 字段

---

包解决方案

我建议您为此使用 3rd 方包，因为它的工作量更少、更清洁且使用起来更稳固。 您可以查看更多spatie's medialibrary for Laravel

Answer 2

我想这就是你想要的。

这将创建一个新的Product 并为$request->file('fileToUpload[]') 中传递的每个图像创建一个新的ProductGallery：

$product = new Product();
$product->product_name = $request->product_name;
$product->product_description = $request->product_description;
if($request->hasFile('product_preview')) {
  $file = Input::file('product_preview');
  $filename = time(). '-' .$file->getClientOriginalName();
  $product->product_preview = $filename;
  $file->move(public_path().'/images/product-feature', $filename);
}
$product->category_id = $request->category_id;
$product->color_id = $request->color_id;
$product->size_id = $request->size_id;
$product->material_id = $request->material_id;
// $product->fantasia_id = $request->fantasia_id;


// First save the product (so that you have it's ID)
$product->save();
// Then create galleries
if($request->hasFile('fileToUpload[]')) {
  $files = Input::file('fileToUpload[]');
  foreach ($files as $photo) {
    $productgallery = new ProductGallery();
    $filename = time(). '-' .$photo->getClientOriginalName();
    $productgallery->product_images = $filename;
    $photo->move(public_path().'/images/product-gallery', $filename);
    $productgallery->product_id = $product->id; // Save it to the newly created product
    $productgallery->save();
  }
}
return $this->create()->with('success', 'Uploaded Successfully');