用Javascript表示复杂/嵌套数据

我试图通过JSON将稍微复杂的Rails应用程序发送到JS脚本，以某种有趣的方式呈现页面。假设Rails中的数据是关于人及其资产的，如下所示：

[
  {:name => 'Bill Smith', :state => 'KS'} => [
    {:type => 'house', :valuation => 150000},
    {:type => 'car', :valuation => 10000}
  ], 
  {:name => 'Bubba Jack', :state => 'FL'} => [
    {:type => 'boat', :valuation => 12000}
  ]
]

[{"{:name=>\"Bill Smith\", :state=>\"KS\"}":[{"type":"house","valuation":150000},{"type":"car","valuation":10000}],"{:name=>\"Bubba Jack\", :state=>\"FL\"}":[{"type":"boat","valuation":12000}]}]

在JS方面，我希望能够访问各个字段，但是JS不允许对象的键成为对象，因此data.to_json将所有个人详细信息转换为一个字符串，如下所示：

[
  {:name => 'Bill Smith', :state => 'KS'} => [
    {:type => 'house', :valuation => 150000},
    {:type => 'car', :valuation => 10000}
  ], 
  {:name => 'Bubba Jack', :state => 'FL'} => [
    {:type => 'boat', :valuation => 12000}
  ]
]

[{"{:name=>\"Bill Smith\", :state=>\"KS\"}":[{"type":"house","valuation":150000},{"type":"car","valuation":10000}],"{:name=>\"Bubba Jack\", :state=>\"FL\"}":[{"type":"boat","valuation":12000}]}]

我不能做像这样的事情

var people = Object.keys(data);
for(var i=0; i<people.length; i++) {
    var totAsset = 0;
    var person = people[i];
    for(var j=0;j<data[person].length; j++) {
        totAssset = totAsset + data[person][j].valuation
    }
    alert("got person named " +person.name+" having $"+totAsset);
}

var people=Object.keys（数据）；
对于（var i=0；i来说，这样组织您的记录不是更容易吗：

@people = [
    {:name => 'Bill Smith', :state => 'KS', :assets => [
        {:type => 'house', :valuation => 150000},
        {:type => 'car', :valuation => 10000}
    ]}, 
    {:name => 'Bubba Jack', :state => 'FL', :assets => [
        {:type => 'boat', :valuation => 12000}
    ]}
]

然后使用“render:json=>@people”，这将为您提供

{[ "name": 'Bill Smith', "state": 'KS', "assets": [
    {"type": 'house', "valuation": 150000},
    {"type": 'car', "valuation": 10000},
],
[ "name": 'Bubba Jack', "state": 'FL', "assets": [
    {"type": 'boat', "valuation": 12000}
]}

然后访问这些值

'Bill Smith' = people[0]["name"]
'house'      = people[0]["assets"][0]["type"]

这样组织您的记录不是更容易吗：

@people = [
    {:name => 'Bill Smith', :state => 'KS', :assets => [
        {:type => 'house', :valuation => 150000},
        {:type => 'car', :valuation => 10000}
    ]}, 
    {:name => 'Bubba Jack', :state => 'FL', :assets => [
        {:type => 'boat', :valuation => 12000}
    ]}
]

然后使用“render:json=>@people”，这将为您提供

{[ "name": 'Bill Smith', "state": 'KS', "assets": [
    {"type": 'house', "valuation": 150000},
    {"type": 'car', "valuation": 10000},
],
[ "name": 'Bubba Jack', "state": 'FL', "assets": [
    {"type": 'boat', "valuation": 12000}
]}

然后访问这些值

'Bill Smith' = people[0]["name"]
'house'      = people[0]["assets"][0]["type"]