7

Tastypie 返回一个数组，包括嵌套资源如下：

data = [

{"adult_price": "123", "child_price": "123", "currency": [{"abbrev": "USD", "id": "1", "name": "US Dollars", "resource_uri": "/api/v1/currency/1/", "symbol": "$"}], "day": [{"day_of_week": "TUE", "id": "2", "resource_uri": "/api/v1/days/2/"}], "description": "Please enter the tour description here", "id": "1", "important": "ex. Please contact us to negotiate a price if you want to book the Fiat for 1 person only.", "location": [{"id": "1", "name": "Dublin", "resource_uri": "/api/v1/location/1/"}], "name": "test dublin", "resource_uri": "/api/v1/tours/1/", "start_time": "23:03:51", "subtitle": "ex. These prices include... but not...", "teenager_student_price": "123", "under_6_price": "123"}, 

{"adult_price": "22", "child_price": "22", "currency": [{"abbrev": "USD", "id": "1", "name": "US Dollars", "resource_uri": "/api/v1/currency/1/", "symbol": "$"}], "day": [{"day_of_week": "WED", "id": "3", "resource_uri": "/api/v1/days/3/"}], "description": "Please enter the tour description here", "id": "2", "important": "ex. Please contact us to negotiate a price if you want to book the Fiat for 1 person only.", "location": [{"id": "2", "name": "Venice", "resource_uri": "/api/v1/location/2/"}], "name": "test Venice", "resource_uri": "/api/v1/tours/2/", "start_time": "23:09:01", "subtitle": "ex. These prices include... but not...", "teenager_student_price": "22", "under_6_price": "22"}, 

{"adult_price": "22", "child_price": "222", "currency": [{"abbrev": "USD", "id": "1", "name": "US Dollars", "resource_uri": "/api/v1/currency/1/", "symbol": "$"}], "day": [{"day_of_week": "MON", "id": "1", "resource_uri": "/api/v1/days/1/"}, {"day_of_week": "TUE", "id": "2", "resource_uri": "/api/v1/days/2/"}, {"day_of_week": "WED", "id": "3", "resource_uri": "/api/v1/days/3/"}], "description": "Please enter the tour description here", "id": "3", "important": "ex. Please contact us to negotiate a price if you want to book the Fiat for 1 person only.", "location": [{"id": "3", "name": "Rome", "resource_uri": "/api/v1/location/3/"}], "name": "test Rome", "resource_uri": "/api/v1/tours/3/", "start_time": "23:15:09", "subtitle": "ex. These prices include... but not...", "teenager_student_price": "22", "under_6_price": "222"}, 

{"adult_price": "22", "child_price": "222", "currency": [{"abbrev": "USD", "id": "1", "name": "US Dollars", "resource_uri": "/api/v1/currency/1/", "symbol": "$"}], "day": [{"day_of_week": "MON", "id": "1", "resource_uri": "/api/v1/days/1/"}, {"day_of_week": "WED", "id": "3", "resource_uri": "/api/v1/days/3/"}], "description": "Please enter the tour description here", "id": "4", "important": "ex. Please contact us to negotiate a price if you want to book the Fiat for 1 person only.", "location": [{"id": "3", "name": "Rome", "resource_uri": "/api/v1/location/3/"}], "name": "test Rome 2", "resource_uri": "/api/v1/tours/4/", "start_time": "01:01:11", "subtitle": "ex. These prices include... but not...", "teenager_student_price": "22", "under_6_price": "22"}, {"adult_price": "123", "child_price": "123", "currency": [{"abbrev": "USD", "id": "1", "name": "US Dollars", "resource_uri": "/api/v1/currency/1/", "symbol": "$"}], "day": [{"day_of_week": "TUE", "id": "2", "resource_uri": "/api/v1/days/2/"}, {"day_of_week": "THU", "id": "4", "resource_uri": "/api/v1/days/4/"}], "description": "Please enter the tour description here", "id": "5", "important": "ex. Please contact us to negotiate a price if you want to book the Fiat for 1 person only.", "location": [{"id": "2", "name": "Venice", "resource_uri": "/api/v1/location/2/"}], "name": "test Venice 2", "resource_uri": "/api/v1/tours/5/", "start_time": "01:03:27", "subtitle": "ex. These prices include... but not...", "teenager_student_price": "123", "under_6_price": "123"}

]

我想执行一个 .groupBy 按 location[0].names 属性分组，它应该返回一个由 3 个数组组成的数组。这可能吗？

我怎样才能执行相当于：

_.groupBy(data, 'location[0].name']
4

1 回答 1

21

for 的第二个参数groupBy可以是函数或字符串：

通过...分组 _.groupBy(list, iterator)

将集合拆分为集合，按通过迭代器运行每个值的结果进行分组。如果迭代器是字符串而不是函数，则按迭代器命名的属性对每个值进行分组。

您想使用函数表单，因为您没有对简单的顶级属性进行分组：

_(data).groupBy(function(o) {
    return o.location[0].name;
});

或者：

_(data).groupBy(o => o.location[0].name)

演示：http: //jsfiddle.net/ambiguous/YFKXC/

于 2012-11-27T04:59:27.040 回答