duan3601 2016-12-30 07:48
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如何在laravel中使用数组字段分配关系和获取数据

There are two models: Restaurant and Category

Restaurant{
  '_id' : 12345678
  'name' : "xyz",
  'abstract' : "awdwadawdawdawd",
  'category': [1,2,3,4] //category ids
}

Category{
  '_id' : 1,
  'name' : 'PQR'
}

How can I assign relationship and fetch all the categories using that array field (category) of Restaurant in laravel 5.3 and Database is mongodb?

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  • drzablspw01655860 2016-12-30 07:56
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    I am not quite sure about your DB structure, but I think it would be better to create a new pivot table to store the categories of each restaurant in a different row like this:

    id | restaurant_id | category_id
    1  | 23            | 3
    2  | 23            | 5
    3  | 25            | 4
    

    As a convention the table should be named 'category_restaurant'

    This would be a many to many relationship in laravel.

    class Restaurant
    {
        public function categories()
        {
            return $this->belongsToMany(Category::class);
        }
    }
    
    class Category
    {
        public function restaurants()
        {
            return $this->belongsToMany(Restaurant::class);
        }
    }
    

    Then in your code you can get the ids of a restaurant in this way:

    $restaurant = Restaurant::find(1);
    $categories = $restaurant->categories;
    
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