试图播种Neo4j数据库

Question

我试图通过Faker，NeoEloquent和Eloquent的Seeder类来播种neo4j数据库（第一次）。它使一家零售商，两家公司，一些产品和一起产品有关。

关系

Retailer -> Many-Many -> Product
Retailer -> One-Many  -> Company
Company  -> One-Many  -> Product

代码

public function run()
{
    Eloquent::unguard();

    $faker = Faker\Factory::create();

// Retailer

    Retailer::createWith([
        [
            'name'      => $faker->company
        ],
        [
            'companies' => 
            [
                [
                    'company_id' => $faker->randomNumber(8), 
                    'name'       => $faker->company, 'active' => 1
                ],
                [
                    'company_id' => $faker->randomNumber(8), 
                    'name' => $faker->company, 'active' => 1
                ]
            ]
        ]
    ]);

// Products

    for ($i = 1; $i < 3; $i++)
    {
        for ($j = 1; $j < $faker->numberBetween(1,3); $j++)
        {
            $product = Product::create([
                'product_id' => $faker->randomNumber(8),
                'name'       => $faker->name,
                'active'     => '1',
                'time_added' => $faker->date,
                'price'      => $faker->numberBetween(1,999),
            ]);
            $retailer = Retailer::find(1);
            $retailer->products()->save($product);   // error here
            $company  = Company::find($i);
            $company->products()->save($product);
        }
    }
}

错误

{"error":
 {"type":"Symfony\\Component\\Debug\\Exception\\FatalErrorException",
  "message":"Call to undefined method Illuminate\\Database\\Eloquent\\Collection::products()",
 "file":"D:\\Swaggable\\Laravel\\app\\database\\seeds\\DatabaseSeeder.php",
 "line":62}}

我无法想办法解决这个问题......

Answer 1

我认为不是：

$retailer->products()->save($product);

你应该使用：

$retailer->products->save($product);

之后：

$retailer = Retailer::find(1);

如果零售商不为空，您应该添加额外的检查，例如：

if (is_null($retailer)) {
  die('retailer not found') 
}

如果你不知道零售商的ID是什么，你应该使用：

$retailer = Retailer::orderby('id', 'desc')->first();

查找此数组中的最后一条记录