Rails Action呈现html而不是json

Question

I am using Rails 3. I really have a strange problem. I have a list of Country States as a select box, and I have hooked up jquery's $.ajax({}) , on change of the States select box.

The action takes a state code as a parameter and returns the districts that belong to a specific state. When the request is sent to /districts?state=1 , it responds with a status code of 302(found) and then it also sends the current html page as a response.

Following is my code:

# Controller Action

def districts
  state = params[:state]

  respond_to do |format|
    format.json{ render :json => get_districts(state) }
  end
end


# jQUery Request:

$.ajax({
    url: '<%= districts_path %>',
    data: {state: 1},
    success: function(data){
        for(i in data){
            options += '<option value="'+data[i].code+'">'+data[i].district+'</option>'
        }

        $("#some_element").html('<select id="some_district" name="some_district">'+options+'</select>')
    }
});

Answer 1

Try setting the dataType option to the ajax call:

$.ajax({
    url: '<%= districts_path %>',
    dataType: 'json',
    data: {state: 1},

edit added comma

Answer 2

HTTP 302, in my experience, is due to authentication issues. You should consider posting your controller code/routes and any authentication as well as any errors that may be occurring.