R – How to modify the default RoR behavior to AJAX CRUD

ajaxrubyruby-on-rails

I want a table to do CRUD, but I want it in an Ajax way, how can I modify the default RoR behavior, any suggestions on that?

I tried comment these code in destroy method, but it don't work, it saw missing the destroy.erb:

respond_to do |format|
  format.html { redirect_to(categories_url) }

  format.xml  { head :ok }
end

Best Answer

It will default to HTML if you don't give (and accept) a different response. Check out this railscast to see how to set up an AJAX request and response with RJS (there's another on how to do it with jQuery).

Basically you'll need a format.js line. You can also make a view of the form .js.erb where you write JavaScript to run on the server response.

As a side note though, unless you have a very specific website, I'd suggest not doing only AJAX. It's not very accessible for users without JavaScript, like blind users with a screenreader.

Related Solutions

Javascript – How to get jQuery to perform a synchronous, rather than asynchronous, Ajax request

From the jQuery documentation: you specify the asynchronous option to be false to get a synchronous Ajax request. Then your callback can set some data before your mother function proceeds.

Here's what your code would look like if changed as suggested:

beforecreate: function (node, targetNode, type, to) {
    jQuery.ajax({
        url: 'http://example.com/catalog/create/' + targetNode.id + '?name=' + encode(to.inp[0].value),
        success: function (result) {
            if (result.isOk == false) alert(result.message);
        },
        async: false
    });
}

Javascript – How to manage a redirect request after a jQuery Ajax call

I read this question and implemented the approach that has been stated regarding setting the response HTTP status code to 278 in order to avoid the browser transparently handling the redirects. Even though this worked, I was a little dissatisfied as it is a bit of a hack.

After more digging around, I ditched this approach and used JSON. In this case, all responses to AJAX requests have the status code 200 and the body of the response contains a JSON object that is constructed on the server. The JavaScript on the client can then use the JSON object to decide what it needs to do.

I had a similar problem to yours. I perform an AJAX request that has 2 possible responses: one that redirects the browser to a new page and one that replaces an existing HTML form on the current page with a new one. The jQuery code to do this looks something like:

$.ajax({
    type: "POST",
    url: reqUrl,
    data: reqBody,
    dataType: "json",
    success: function(data, textStatus) {
        if (data.redirect) {
            // data.redirect contains the string URL to redirect to
            window.location.href = data.redirect;
        } else {
            // data.form contains the HTML for the replacement form
            $("#myform").replaceWith(data.form);
        }
    }
});

The JSON object "data" is constructed on the server to have 2 members: data.redirect and data.form. I found this approach to be much better.

Best Answer

Related Solutions

Javascript – How to get jQuery to perform a synchronous, rather than asynchronous, Ajax request

Javascript – How to manage a redirect request after a jQuery Ajax call

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