Question

我有像这样的对象的数组，

[
  {
    "link": "link1",
    "model": "model1",
    "role": "role1",
    "access": "true"
  },
  {
    "link": "link1",
    "model": "model1",
    "role": "role2",
    "access": "true"
  },
  {
    "link": "link1",
    "model": "model1",
    "role": "role3",
    "access": "true"
  },
  {
    "link": "link1",
    "model": "model1",
    "role": "role4",
    "access": "true"
  },
  {
    "link": "link1",
    "model": "model2",
    "role": "role1",
    "access": "false"
  },
  {
    "link": "link1",
    "model": "model2",
    "role": "role2",
    "access": "false"
  },
  {
    "link": "link1",
    "model": "model2",
    "role": "role3",
    "access": "false"
  },
  {
    "link": "link1",
    "model": "model2",
    "role": "role4",
    "access": "false"
  },
  {
    "link": "link2",
    "model": "model1",
    "role": "role1",
    "access": "false"
  },
  {
    "link": "link2",
    "model": "model1",
    "role": "role2",
    "access": "true"
  },
  {
    "link": "link2",
    "model": "model1",
    "role": "role3",
    "access": "false"
  },
  {
    "link": "link2",
    "model": "model1",
    "role": "role4",
    "access": "true"
  },
  {
    "link": "link2",
    "model": "model2",
    "role": "role1",
    "access": "false"
  },
  {
    "link": "link2",
    "model": "model2",
    "role": "role2",
    "access": "true"
  },
  {
    "link": "link2",
    "model": "model2",
    "role": "role3",
    "access": "false"
  },
  {
    "link": "link2",
    "model": "model2",
    "role": "role4",
    "access": "true"
  }
]

对于此question，输入是一个CSV样本，行数非常少。实际上我有一个大的CSV文件，我找到了一种方法来导入它并使用d3.js转换为JSON，但问题是我无法将其转换为所需的格式。我尝试使用data.forEach并且输出非常奇怪，我无法理解为什么我在两个链接中都单独model2。

代码：

d3.csv('data.csv', function(data) {

            var newData = {};

            data.forEach(function(e, i) {
                newData[e.link] = {};
                newData[e.link][e.model] = {};
            })

            d3.select('main').append('pre')
                .text(JSON.stringify(newData, null, '  '));
        });

输出：

{
  "link1": {
    "model2": {}
  },
  "link2": {
    "model2": {}
  }
}

期望输出：

"link1": {
    "model1": {
        "role1": true,
        "role2": true,
        "role3": true,
        "role4": true,
    },
    "model2": {
        "role1": false,
        "role2": false,
        "role3": false,
        "role4": false,
    }
},
"link2": {
    "model1": {
        "role1": false,
        "role2": true,
        "role3": false,
        "role4": true,
    },
    "model2": {
        "role1": false,
        "role2": true,
        "role3": false,
        "role4": true,
    }
}

任何帮助将不胜感激。提前谢谢。

Answer 1

在forEach中，您不会在每次迭代时分配角色和访问对，并且您总是清空每个部分。

用这个改变你的forEach ......

data.forEach(function(e, i) {

    // Check if this "link" already exists exists, if not, create it.
    if (!newData[e.link])
        newData[e.link] = {};

    // Check if this "model" already exists inside of this "link", if not, create it.
    if (!newData[e.link][e.model])
        newData[e.link][e.model] = {};

    newData[e.link][e.model][e.role] = e.access;
});

我希望它有所帮助

Answer 2

希望这会有所帮助

var data = [ { "link": "link1", "model": "model1", "role": "role1", "access": "true" }, { "link": "link1", "model": "model1", "role": "role2", "access": "true" }, { "link": "link1", "model": "model1", "role": "role3", "access": "true" }, { "link": "link1", "model": "model1", "role": "role4", "access": "true" }, { "link": "link1", "model": "model2", "role": "role1", "access": "false" }, { "link": "link1", "model": "model2", "role": "role2", "access": "false" }, { "link": "link1", "model": "model2", "role": "role3", "access": "false" }, { "link": "link1", "model": "model2", "role": "role4", "access": "false" }, { "link": "link2", "model": "model1", "role": "role1", "access": "false" }, { "link": "link2", "model": "model1", "role": "role2", "access": "true" }, { "link": "link2", "model": "model1", "role": "role3", "access": "false" }, { "link": "link2", "model": "model1", "role": "role4", "access": "true" }, { "link": "link2", "model": "model2", "role": "role1", "access": "false" }, { "link": "link2", "model": "model2", "role": "role2", "access": "true" }, { "link": "link2", "model": "model2", "role": "role3", "access": "false" }, { "link": "link2", "model": "model2", "role": "role4", "access": "true" } ]


var newData = {};
data.forEach(function(e, i) {
  var keys = Object.keys(newData);
  if(keys.indexOf(e.link)==-1){
    newData[e.link] = {};
  }
  if(Object.keys(newData[e.link]).indexOf(e.model)==-1){    
    newData[e.link][e.model]={}; 
  }   
  newData[e.link][e.model][e.role] = e.access;   
})
console.log(newData);

转换对象数组 - JSON

2 个答案: