从JSON树获取AJAX

Question

I'm just starting out with AJAX, trying to use JQuery's $.getJSON function (or any related, ie $.load(), $.ajax(), etc). I have a JSON file with a structure something like this:

[
    {
        "id": 1,
        "email": "[e-mail]",
        "password": "password"
    },
    {
        "id": 2,
        "email": "[e-mail]",
        "password": "password"
    }
]

How can I call a GET on this JSON file (let's call it users.json) for a user with a specific email? I thought it would be the second paramter in $.getJSON, but that seems to just return the whole tree.

Thanks!

Answer 1

Short answer - you can't do this directly with AJAX. jQuery can extract portions of HTML and XML documents, but not JSON.

Easiest answer - retrieve the entire object (you have to, anyway) and use jsonpath to get the structure you want

Longer answer - retrieve the entire object, and traverse it yourself to get the object you want

Best answer - make the email address a parameter to whatever script produces the json and have the server only return the data you want.