搜索值深深嵌套在Laravel Collection中

Question

我有一个像这样的Eloquent Collection(倾销):

Collection {#788 ?
  #items: array:3 [?
    0 => Rating {#787 ?
      #table: "ratings"
      +timestamps: false
      #connection: null
      #primaryKey: "id"
      #keyType: "int"
      #perPage: 15
      +incrementing: true
      #attributes: array:3 [?
        "id" => 1
        "rating" => "50"
        "type" => "min"
      ]
      #original: array:3 [?]
      #relations: []
      #hidden: []
      #visible: []
      #appends: []
      #fillable: []
      #guarded: array:1 [?]
      #dates: []
      #dateFormat: null
      #casts: []
      #touches: []
      #observables: []
      #with: []
      #morphClass: null
      +exists: true
      +wasRecentlyCreated: false
    }
    1 => Rating {#786 ?}
    2 => Rating {#785 ?}
  ]
}

在我的一个观点中,我只需要显示带有'max'类型的评级,我试图直到现在才过滤该集合而没有成功.到目前为止我的尝试:

if ($ratings && $ratings -> search('max') != false)

要么

if ($ratings && $ratings -> contains('max'))

那么...... 实现这一目标的聪明而有说服力的方法是什么？

提前致谢.

Answer 1

您可以使用以下where方法:https://laravel.com/docs/5.4/collections#method-where

$filtered_ratings = $ratings->where('type', 'max');

Answer 2

filter()您还可以在集合上使用该方法。

return $collection->filter(function ($value, $key) {
    if($value->type == 'max'){
      return $value;
    }    
});