javascript - 实现 json 迭代

Question

我有以下 JSON，需要迭代“规则”对象。我似乎永远无法正确地调用它，以便能够访问不仅仅是最后一条规则。

如果有人能指出我正确的方向，我将不胜感激

var rules = [{
"rule":[{
    "fields":["CASE.PROSECUTED_FLAG","CASE.RESTITUTION_SIGNED"],
    "conditions":["N","Y"],
    "actions":"required",
    "action_fields":["test1","test2"]
}],
"rule":[{
    "fields":["CASE.PROSECUTED_FLAG","CASE.RESTITUTION_SIGNED"],
    "conditions":["N","N"],
    "actions": "required",
    "action_fields": ["test3", "test4"]
}],
 "rule":[{
    "fields":["CASE.PROSECUTED_FLAG"],
    "conditions":["Y"],
    "actions": "required",
    "action_fields": ["test5"]
}]
}];




function rulesControl() {
    alert(rules.length);
    for (var rule in rules) {

    var xfields = rules[rule].rule.fields;
    var conditions = rules[rule].rule.conditions;
    var actions = rules[rule].rule.actions;
    var action_fields = rules[rule].rule.action_fields;

    //test the fields (if success, mark them, else clear them)
    if (validateRule(xfields, conditions)) {
        rulesAction(actions, action_fields);
    } else {
        ruleActionMakeClear(action_fields);
    }
    }
}

Answer 1

这是因为 JSON 的格式很奇怪。它在包含对象上定义了三次属性“规则”，本质上是覆盖自身。这可能更符合您的需求，而不是将所有这些单个项目数组嵌套在对象中。

var rules = [
{"rule":
    {
    "fields":["CASE.PROSECUTED_FLAG","CASE.RESTITUTION_SIGNED"],
    "conditions":["N","Y"],
    "actions":"required",
    "action_fields":["test1","test2"]
    }
},
{"rule":
    {
    "fields":["CASE.PROSECUTED_FLAG","CASE.RESTITUTION_SIGNED"],
    "conditions":["N","N"],
    "actions": "required",
    "action_fields": ["test3", "test4"]
    }
},
{"rule":
    {
    "fields":["CASE.PROSECUTED_FLAG"],
    "conditions":["Y"],
    "actions": "required",
    "action_fields": ["test5"]
    }
}
];

您可以通过以下方式访问它:

rules[i].rule.PROPERTY

其中 i 是规则的索引值，PROPERTY 是字段、条件等。