CodeIgniter和JSON对象：如何将数据推送到数据库？

Question

I have a JS file that manages my data (push the data in my JSON objects, etc), and the classic MVC structure of files from CodeIgniter.

My JS contains my JSON objects that I would like to push in my database. How could I do for it? How can I reach the controller and the model from my JS file? I just can't figure out what is the right process to achieve my goal! And I find nothing similar to my question.

EDIT The data to push into the database is a part of the entire JSON object.The data to push is, for example: { "index": 0, "x": 50, "y": 80, "weight": 2, "px": 50, "py": 80, "fixed": 0 } In my JS file, I have tried this code:

  $("#hexa-btn").on("click", function () {

    $.ajax({
         type: "POST",
         url: "/prototype/returndata", 
         data: JSONshapes.shapes[0].nodes[0],
         cache: false,
         success:  
            function(data){
              console.log(data.index);
              console.log(data.x);
              console.log(data.y);
            }
          });
  });

And my controller has this function:

   function returndata(){
     $index = $this->input->post('index');  
     $x = $this->input->post('x'); 
     $y = $this->input->post('y'); 
     $weight = $this->input->post('weight'); 
     $px = $this->input->post('px'); 
     $py = $this->input->post('py'); 
     $fixed = $this->input->post('fixed'); ;  

     echo json_encode(array('node'=>$node));
   }

I am not sure at all about this function. It seems this is the role of the model to do this job, isn'it?

2nd EDIT So, I tried the solution of @Harish Lalwani, but this time with my array of nodes (not only one). I have the following function in the JavaScript file:

function sendNode(){
    var node_url = "/prototype/insert_node";
    var data_node = JSON.stringify(JSONshapes.shapes[0].nodes);
    $.post(node_url, {'node_data': data_node}, function(data){
      console.log(data.index);
    });
  }

and the following one in the controller (thank to this post):

    function insert_node(){
      $node_data = $this->input->post('node_data');
      $node_data = json_decode($node_data,true); 
      echo 'Your Data: ' . $node_data[0]['index'];
    }, 

But, when printing the data, I get undefined. The variable data_node is the following (so, is an array):

[{"index":0,"x":50,"y":80,"weight":2,"px":50,"py":80,"fixed":0},{"index":1,"x":189,"y":107,"weight":2,"px":189,"py":107},{"index":2,"x":95,"y":145,"weight":2,"px":95,"py":145}]

Now, I don't know anymore what to do! I find really too few examples. Can anyone put me out of my misery? Thank you very much in advance!!

Answer 1

Using ajax can solve your problem!

$.ajax({
         type: "POST",
         url: "test.php", 
         data: yourData,
         dataType: "text",  
         cache:false,
         success: 
              function(data){
                alert(data);  //as a debugging message.
              }
          });// you have m