Outputting jSON in a rails app

Question

ok, rails 3 new developer here.

I want my jquery to be able to get a json object from the rails 3 application for projects. Here is my controller.

def yo         


        

Answer 1

You can set the Accept: application/json header for real REST, or you can add the format to the URL for quick hackery:

$.ajax({url: '/projects/yourprojects.json', dataType: 'json'});

Answer 2

:formats=>[:html]

That says the server is thinking that html is being requested. Try adding a .json to your path (and possible route) and that will force the format. TO make that would would need a route something like this:

map.your_projects '/projects/yourprojects.:format',
  :controller => 'projects',
  :action => 'yourprojects'

Somehow, someway, the params[:format] should be "json" for this request so the format handlers can do the right thing.

Answer 3

This is not issue of Rails but rather AJAX / jQuery not sending Accept header: Try this:

$.ajax({
   url: 'url_to_action', dataType: "json",
     beforeSend : function(xhr){
       xhr.setRequestHeader("Accept", "application/json")
     },
     success : function(data){
       //.. do something with data
     },
     error: function(objAJAXRequest, strError, errorThrown){
       alert("ERROR: " + strError);
     }
  }
);

If all your AJAX requests expect JSON, then you can set header globally:

$.ajaxSetup({
  dataType: 'json',
  'beforeSend' : function(xhr){
    xhr.setRequestHeader("Accept", "application/json")
  } 
});

Other option would be adding .json to path or data:{format: 'json'} to $.ajax hash of options. Rails supports format path suffixes by default for resoures routing. Just try rake routes to see.