Question

在我的数据库中我有product_category和products，product可能属于product_category表中的一个或某个类别，现在我的问题是：当用户提交时具有一个或某个类别的产品如何将其保存在数据库中以使一个类别具有一个或一些产品？

在视图中我有多个选择为：

{{ Form::select('categories[]', $productCategories, null, array('class' => 'multiselect-success multiselect_selected','multiple'=>'multiple')) }}

products型号：

class Products extends Model
{
    protected $table = 'products';
    protected $guarded = ['id'];
    protected $casts = [
        'images' => 'array'
    ];

    public function productCategories()
    {
        return $this->belongsTo(ProductCategories::class);
    }
}

productCategories型号：

class ProductCategories extends Model
{
    protected $table = 'product_categories';
    protected $guarded =['id'];
    protected $casts=[
        'images'=>'array'
    ];

    public function products()
    {
        return $this->hasMany(Products::class);
    }
}

和store功能转换为controller：

public function store(RequestProducts $request)
{
    try {
        $data = Products::create([
            'name' => $request->name,
            'amount' => $request->amount,
            'product_code' => $request->product_code,
            'weight' => $request->weight
            /* MY PROBLEM IS HERE */
            'category_id' => $request->categories
        ]);
    } catch (Exception $ex) {
        ...
    }

    return redirect(route('manageProductCategories.index'));
}

在html视图中categories是一个数组，我该如何实现呢？

更新

用createMany更新代码后

我收到此错误：

General error: 1364 Field 'category_id' doesn't have a default value (SQL: insert into `products` (`name`, `lang`, `amount`, `product_code`, `weight`, `images`, `updated_at`, `created_at`) values (eqweqwe, fa, 45,000, asd, asdasd, '', 2017-12-09 04:45:44, 2017-12-09 04:45:44))

迁移文件：

public function up()
{
    Schema::create('product_categories', function (Blueprint $table) {
        $table->increments('id');
        $table->string('category_name');
        $table->string('lang', 2);
        $table->text('images');
        $table->timestamps();
    });
}

public function up()
{
    Schema::create('products', function (Blueprint $table) {
        $table->increments('id');
        $table->string('name');
        $table->string('amount');
        $table->string('product_code');
        $table->string('weight');
        $table->string('lang', 2);
        $table->text('images');
        $table->integer('category_id')->unsigned()->index();
        $table->foreign('category_id')->references('id')->on('product_categories')->onDelete('cascade');
        $table->timestamps();
    });
}

Answer 1

从您的问题和评论中，我理解以下内容。

许多产品可能属于＆＃34; category_1＆＃34;和＆＃34; product_1＆＃34;可能属于很多类别。

要实现这一点，你必须使用＆＃34;很多很多＆＃34;关系。我已经更新了您的代码，这可能会对您有所帮助。

<强>迁移

public function up()
{
    Schema::create('product_categories', function (Blueprint $table) {
        $table->increments('id');
        $table->string('category_name');
        $table->string('lang', 2);
        $table->text('images');
        $table->timestamps();
    });
}

public function up()
{
    Schema::create('products', function (Blueprint $table) {
        $table->increments('id');
        $table->string('name');
        $table->string('amount');
        $table->string('product_code');
        $table->string('weight');
        $table->string('lang', 2);
        $table->text('images');
        $table->timestamps();
    });
}
    public function up()
{
    Schema::create('products_product_category', function (Blueprint $table) {
        $table->integer('product_id');
        $table->integer('product_category_id');
    });
}

<强>模型

产品型号：

class Products extends Model
{
    protected $table = 'products';
    protected $guarded = ['id'];
    protected $casts = [
        'images' => 'array'
    ];

    public function productCategories()
    {
        return $this->belongsToMany(ProductCategories::class,'products_product_category');
    }
}

productCategories模型：

class ProductCategories extends Model
{
    protected $table = 'product_categories';
    protected $guarded =['id'];
    protected $casts=[
        'images'=>'array'
    ];

    public function products()
    {
        return $this->belongsToMany(Products::class, 'products_product_category');
    }
}

<强>控制器

public function store(RequestProducts $request)
{
    try {
        $data = Products::create([
            'name' => $request->name,
            'amount' => $request->amount,
            'product_code' => $request->product_code,
            'weight' => $request->weight
        ]);
        $data->productCategories()->sync($request->categories);
    } catch (Exception $ex) {
        ...
    }

    return redirect(route('manageProductCategories.index'));
}

希望它会有所帮助..

Laravel实施属于一个或一些类别的产品

1 个答案: