Question

我有样本json。在那个json我需要检查以下内容。

是否有效Json。
名称密钥是必需的，不含空（列表名称和项目名称）。
items数组长度需要大于5。

我附上了我的代码并且无法正常工作。我觉得这种做法并不好。任何人都可以向我建议正确的道路。

var test = '{ "lists": [ { "items": [ { "name": "Curd0", "sequence": 3 }, { "name": "Curd1", "sequence": 2 }, { "name": "Curd2", "sequence": 1 }, { "name": "Curd3", "sequence": 4 }, { "name": "Curd4", "sequence": 10 }, { "name": "Curd5", "sequence": 9 }, { "name": "Curd6", "sequence": 8 }, { "name": "Curd7", "sequence": 7 }, { "name": "Curd8", "sequence": 6 }, { "name": "Curd9", "sequence": 5 } ], "name": "Curd Family", "status": "new", "created_by": 100036, "created_on": "2016-05-05T13:18:26.169Z" }, { "items": [ { "name": "Milk0", "sequence": 3 }, { "name": "Milk1", "sequence": 2 }, { "name": "Milk2", "sequence": 1 }, { "name": "Milk3", "sequence": 4 }, { "name": "Milk4", "sequence": 10 }, { "name": "Milk5", "sequence": 9 }, { "name": "Milk6", "sequence": 8 } ], "name": "Milk Family", "status": "new", "created_by": 100036, "created_on": "2016-05-05T13:18:44.504Z" }, { "items": [ { "name": "Water0", "sequence": 3 }, { "name": "Water1", "sequence": 2 }, { "name": "Water2", "sequence": 1 }, { "name": "Water3", "sequence": 4 }, { "name": "Water4", "sequence": 10 }, { "name": "Water5", "sequence": 9 }, { "name": "Water6", "sequence": 8 } ], "name": "Water Family", "status": "new", "created_by": 100036, "created_on": "2016-05-05T13:19:02.329Z" }, { "items": [ { "name": "Fruit0", "sequence": 3 }, { "name": "Fruit1", "sequence": 2 }, { "name": "Fruit2", "sequence": 1 }, { "name": "Fruit3", "sequence": 4 } ], "name": "Fruit Family", "status": "new", "created_by": 100036, "created_on": "2016-05-05T13:19:15.503Z" } ] }';


function Validate(data, callback) {

    for (index in lists) {
        if (!lists.index.hasOwnProperty('name')) {
            callback("Name cannot be empty");
        }

        var itemList = lists.index.items;
        if (itemList.length < 5) {
            callback("List need more than 5 lenth");
        }
        for ( i = 0; i < itemList.length; i++) {
            if (!itemList[i].hasOwnProperty('name')) {
                callback("Item Name cannot be empty");
            }
        }

    }
    callback(null);
}


Validate(test, function (err) {

    console.log(err);
});

Answer 1

every可能就是您所需要的：

function containsNameInLists(element) {
  return element.hasOwnProperty('name');
}

function containsNameInItems(element) {
    return element.items.every(containsKeyName);
}

function containsKeyName(element) {
    return element.hasOwnProperty('name');
}

function lengthSuperiorTo5(element) {
    return element.length > 5;
}

function itemsArrayLength(){
    return element.items.every(lengthSuperiorTo5);
}

您可以使用JSON.parse

测试您的字符串是否为有效的JSON字符串

尝试使用字符串来测试不同的功能。

Demo

编辑：我添加了附加功能：

EDIT DEMO

Answer 2

回调会多次调用，请添加“返回”：

   return callback(...);

对于node.js中的验证json，有一个很好的库：https://github.com/hapijs/joi

Node + Json验证密钥嵌套数组

2 个答案: