> On Feb 28, 2016, at 10:18 PM, Le Hung <li...@ruby-forum.com> wrote:
>
> I'm new in Rails.
>
> I'm trying to add a form with ajax.It's just typing a text and submit to
> file 'ex/act' and show the param in form.
>
> My code:
>
> <script>
> function loadDoc(url, cfunc) {
> var xhttp;
> xhttp=new XMLHttpRequest();
> xhttp.onreadystatechange = function() {
> if (xhttp.readyState == 4 && xhttp.status == 200) {
> cfunc(xhttp);
> }
> };
> xhttp.open("POST", url, true);
> xhttp.send();
> }
> function myFunction(xhttp) {
> document.getElementById("demo").innerHTML = xhttp.responseText;
> }
> </script>
>
> And the form:
>
> <%= form_for :ex,url:ex_act_path,remote:true do |f|%>
> <%= f.text_field :text%>
> <button onclick="loadDoc('ex/act',myFunction)">abc</button>
> <%end%>
>
> In the 'ex/act' controller:
>
> def act
> @a = get_param
> end
> private
> def get_param
> params.require(:ex).permit(:text)
> end
>
> In the Console of browser:
>
> POST http://localhost:3000/ex/act 422 Unprocessable Entity
> GET http://localhost:3000/ex/act 200 OK
Rails has full support for Ajax form submission baked in. Have you tried just
adding remote: true to your form_for declaration, and see what happens? Watch
in the console as you submit the form, see how the correct controller handles
the request. If you write a JS view (name it the same as the controller method
that is invoked by your form, so create.js.erb or update.js.erb, whichever is
appropriate) then you will have access to your updated model object, and you
can use it to re-paint the page with updated data. Here's a very nice write-up
on this approach: http://www.korenlc.com/remote-true-in-rails-forms/
Walter
>
> --
> Posted via http://www.ruby-forum.com/.
>
> --
> You received this message because you are subscribed to the Google Groups
> "Ruby on Rails: Talk" group.
> To unsubscribe from this group and stop receiving emails from it, send an
> email to rubyonrails-talk+unsubscr...@googlegroups.com.
> To post to this group, send email to rubyonrails-talk@googlegroups.com.
> To view this discussion on the web visit
> https://groups.google.com/d/msgid/rubyonrails-talk/befb8748915a530c9f2e920b494f844c%40ruby-forum.com.
> For more options, visit https://groups.google.com/d/optout.
--
You received this message because you are subscribed to the Google Groups "Ruby
on Rails: Talk" group.
To unsubscribe from this group and stop receiving emails from it, send an email
to rubyonrails-talk+unsubscr...@googlegroups.com.
To post to this group, send email to rubyonrails-talk@googlegroups.com.
To view this discussion on the web visit
https://groups.google.com/d/msgid/rubyonrails-talk/3B618ED8-0DB9-4461-B03E-F3EF70AED383%40wdstudio.com.
For more options, visit https://groups.google.com/d/optout.
