当在复杂的JSON数组和散列中搜索项时，比如:
[
{ "id": 1, "name": "One", "objects": [
{ "id": 1, "name": "Response 1", "objects": [
// etc.
}]
}
]
是否有某种查询语言，我可以用来在[0]中找到一个项目。id = 3的对象?
当前回答
如果您像我一样，只想进行基于路径的查找，但不关心真正的XPath，那么lodash的_.get()可以工作。来自lodash docs的例子:
var object = { 'a': [{ 'b': { 'c': 3 } }] };
_.get(object, 'a[0].b.c');
// → 3
_.get(object, ['a', '0', 'b', 'c']);
// → 3
_.get(object, 'a.b.c', 'default');
// → 'default'
其他回答
ObjectPath是一种类似于XPath或JSONPath的查询语言，但由于嵌入了算术计算、比较机制和内置函数，它的功能要强大得多。 请看语法:
商店里所有的鞋子都是红色的，价格在50美元以下
美元. .鞋子。*[颜色为“红色”，价格< 50]
我知道的其他选择是
JSONiq specification, which specifies two subtypes of languages: one that hides XML details and provides JS-like syntax, and one that enriches XQuery syntax with JSON constructors and such. Zorba implements JSONiq. Corona, which builds on top of MarkLogic provides a REST interface for storing, managing, and searching XML, JSON, Text and Binary content. MarkLogic 6 and later provide a similar REST interface as Corona out of the box. MarkLogic 8 and later support JSON natively in both their XQuery and Server-side JavaScript environment. You can apply XPath on it.
HTH.
js看起来也很酷，这里有一个简单的例子:
var obj = {
"car": [
{"id": 10, "color": "silver", "name": "Volvo"},
{"id": 11, "color": "red", "name": "Saab"},
{"id": 12, "color": "red", "name": "Peugeot"},
{"id": 13, "color": "yellow", "name": "Porsche"}
],
"bike": [
{"id": 20, "color": "black", "name": "Cannondale"},
{"id": 21, "color": "red", "name": "Shimano"}
]
},
search = JSON.search(obj, '//car[color="yellow"]/name');
console.log( search );
// ["Porsche"]
var reds = JSON.search(obj, '//*[color="red"]');
for (var i=0; i<reds.length; i++) {
console.log( reds[i].name );
}
// Saab
// Peugeot
// Shimano
是的，它叫做JSONPath:
它还集成到DOJO中。
尝试使用JSPath
JSPath是一种特定于领域的语言(DSL)，它使您能够在JSON文档中导航和查找数据。使用JSPath，您可以选择JSON项，以便检索其中包含的数据。
JSON的JSPath就像XML的XPath。
它针对Node.js和现代浏览器进行了大量优化。
