从Javascript调用Rails操作

Question

I have the this link_to in my that calls the update action in my controller:

<%= link_to((image_tag("lock_closed.svg", :class => "edit")), :controller => "sections", :action => "update",:id => section.id, :remote => true) %>

---

But I would really like to call the update action through some javascript with an ordinary image tag.

So something like:

<%= image_tag("lock_closed.svg", :class => "edit")%>

and:

$(".edit").click(function(){
    if ($(this).hasClass("update")){
    // call update action
    } else {
    //do something else 
    };
})

---

Is it possible to call an action this way? I've been finding a bit on using GET & POST or Ajax methods but I'm not sure how to utilise them to target a specific controller & action.

Answer 1

Send an Ajax call

$(".edit").click(function(){  
  if ($(this).hasClass("update")){     
    $.ajax({
      type: "PUT",
      url: "/sections/<%= section.id %>"
    });
  } else {
    //do something else 
  }; 
})

Answer 2

In order to solve the issue of ActionController::InvalidAuthenticityToken on the ajax call we should send also the authenticity_token .

 $.ajax({
   url: '/sections',
   data: { authenticity_token: $('[name="csrf-token"]')[0].content, 
           id: <%= section.id %> },
   method: 'POST',
   success: function (res) {
     ....
  }
});