Ajax调用总是以错误处理程序结尾

Question

I am trying to get a text value('selected crate') from the server using an ajax call. Ajax call is:

var selected_crate ='';

$.ajax({
    url: OC.linkTo('crate_it', 'ajax/bagit_handler.php')+'?action=get_crate',
    type: 'get',
    dataType: 'text/html',
    success: function(data){
        selected_crate = data.responseText;
        $('#crates option').filter(function(){
            return $(this).attr("id") == selected_crate;
        }).prop('selected', true);
    },
    error: function(data){
        var e = data.responseText;
        alert(e);
    }
});

And the server side code snippet is:

case 'get_crate':
    $msg = $bagit_manager->getSelectedCrate();
    print $msg;
    break;

I want to do something upon success but this call always end up in error handler. If there were complete handler, it would go in that handler. But I want to use both success and error handlers because I want to

1. Send error response if something is wrong from the server side
2. Do something on success in the client side

I am struggling to achieve this. Why this call always end up in error handler and how can I actually send an error response with regard to this call that would end up in error handler if any error occurs otherwise success response?

Answer 1

查看是否在错误处理程序中检索到数据，或者是否正确检索到数据，这意味着您的数据类型与ajax调用中的响应不匹配[请参阅服务器代码，在这种情况下，它必须返回一些额外的值]

Answer 2

url: OC.linkTo('crate_it', 'ajax/bagit_handler.php')+'?action=get_crate',

in place of this try directly url like

url: www.yoursite.com/ajax/bagit_handler.php?action=get_crate

i think it will help you to get Sucess.

Answer 3

If the URL is right then try this:

dataType: "html"

See: http://api.jquery.com/jQuery.ajax/