Jquery - Uncaught TypeError Cannot use in operator to search for 324 in

Question

I m trying to send a Get request by ajax and output json data that is returned by server in html   But  I got this error   Uncaught TypeError  Cannot use  in  operator to search for  324  in     id  50  name   SEO     id  22  name   LPO       This is my code that sends a Get request to php file by ajax  When I use   each method  it get the error that I showed in the above   parentCat on  change   function e       parentCatId     this  val           get           index php r admin post ajax             parentCatId  parentCatId           function data                                      each data  function key  value                   console log key         value                                       This is my PHP code that returns query result in json format   public function actionAjax          parentCatId   GET  parentCatId              catData   Category  getTargetCategoryData  parentCatId            echo CJSON  encode  catData           Yii  app  - gt end         json data outputted by this php is like this      id  50  name   SEO     id  22  name   LPO       Anyone knows how to fix this problem   Please help me out  Thanks in advance

User · Answer

If you re fetching JSON  use   getJSON   so it automatically converts the JSON to a JS Object

User · Answer

In my case  I forgot to tell the type controller that the response is a JSON object  response setContentType  application json

User · Answer

Use getJSON    getJSON   index php r admin post ajax     parentCatId  parentCatId   function data                              each data  function key  value           console log key         value               Detail look here http   api jquery com jQuery getJSON

User · Answer

You can also use   parseJSON data  that will explicit convert a string thats come from a PHP script to a real JSON array

User · Answer

You have a JSON string  not an object  Tell jQuery that you expect a JSON response and it will parse it for you  Either use   getJSON instead of   get  or pass the dataType argument to   get     get       index php r admin post ajax         parentCatId  parentCatId       function data                                  each data  function key  value               console log key         value                         json

User · Answer

I fixed a similar error by adding the json dataType like so     ajax       type   POST       url   someUrl       dataType   json       data            varname1    varvalue1           varname2    varvalue2             success  function  data              each data  function  varname  varvalue                                             And in my controller I had to use double quotes around any strings like so  note  they have to be escaped in java     RequestMapping value     someUrl   method RequestMethod POST   ResponseBody public String getJsonData  RequestBody String parameters           parameters   varname1 varvalue1 amp varname2 varvalue2     String exampleData       somename1     somevalue1     somename2     somevalue2          return exampleData      So  you could try using double quotes around your numbers if they are being used as strings  and remove that last comma       id   50   name   SEO     id   22   name   LPO

[php] Jquery - Uncaught TypeError: Cannot use 'in' operator to search for '324' in

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