使用Ajax的api调用中的响应错误

Question

I want to retrieve the houseType and this is the api call using ajax. Only Console.log for result is fine but the others show undefined . I don't know why it happens.

$.ajax({
    url: 'http://api/get.php',
    type: 'GET',
    crossDomain: true,
    datatype:'json',
    data:{
      HouseNo: 2001
    },
    success: function(result) {
      console.log(result);
      console.log(result.error);
      console.log(result.houses);
      console.log(result.houses.houseType);
      if (result.error == false) {
      window.location.href = "viewHouses.php"
    }
  },
  error: function(result) {
      alert("Error");
  }
});

The console log result is

{"error":false,"houses":[{"houseType":"Mansion"}]}

but the logs of result.error and result.houses are undefined . What am I missing?

Answer 1

As the jquery docs state:

"json": Evaluates the response as JSON and returns a JavaScript object. Cross-domain "json" requests are converted to "jsonp" unless the request includes jsonp: false in its request options. The JSON data is parsed in a strict manner; any malformed JSON is rejected and a parse error is thrown.

If you are requesting the data with a cross-origin request, the options should have a jsonp: false value:

$.ajax({
    url: 'http://api/get.php',
    type: 'GET',
    crossDomain: true,
    datatype:'json',
    jsonp: false,

    data:{
        HouseNo: 2001
    },

    success: function(result) {
        // ...
    },

    error: function(result) {
        // ...
    }
});

To me this looks like you're actually logging a JSON(P) string of some sort. If the above does not work try parsing result with:

try {
    var parsed = JSON.parse(result);
    console.log(parsed);
} catch(err) { console.log(err); }

I'm curious what this snippet would log.