Forum: Ruby on Rails confirm on Post under certain conditions

Rails 3.2.11

When users click a "submit" button, the app can show a confirm dialog by
adding

  :confirm => "Are you sure?"

I need to let it appear if certain conditions are met. It does not
appear if the conditions are not met although the submit action would
get executed.

Say, I have a checkbox, then some JavaScript function detects if the
checkbox is checked or not.
Then, when users decide to click the submit button, the javascript
function sees if the checkbox status: the dialog appears if checked and
submit action follows as users confirm it. The dialog does not appear
but submit action gets executed without confirmation.

Could anyone give me some ideas how to implement something described?

soichi

On Feb 13, 2013, at 2:27 AM, Soichi Ishida wrote:

>
> Say, I have a checkbox, then some JavaScript function detects if the
> checkbox is checked or not.
> Then, when users decide to click the submit button, the javascript
> function sees if the checkbox status: the dialog appears if checked and
> submit action follows as users confirm it. The dialog does not appear
> but submit action gets executed without confirmation.
>
> Could anyone give me some ideas how to implement something described?

Sure. Set up two buttons on a scratch form page, look at the output in a 
browser, and note the differences between them. (Depending on the 
version of Rails you are using, it will be something like 
data-confirm="Are you sure?" or it might be a blodge of inline 
JavaScript hooked to the click event.)

What you'll need to do -- in JavaScript -- is observe the form for 
changes, and programmatically add that property or listener depending on 
the current state of the form. In Prototype, I would use the 
Form.Observer method. I'm not sure what the equivalent is in jQuery, but 
I'm sure there's something like it.

Walter

Thanks for your help!