detect if a form is submitted with ruby on rails?
forms, ruby-on-rails-3, submit
Solution
If your form data is submitted through fields with `name` attributes like `user[profile_attributes][gender]` (all having the `user` prefix), you can check if the `:user` exists in `params`.
... if params.include?(:user)
If for some reason (like coming from the route) `params[:user]` is already going to have a value even for `GET` requests, you can look for a specific form field having a value. For example, you could add a hidden field
<%= f.hidden_field :some_field, :value => true %>
and check for it in your condition
... if params[:user].include?(:some_field)
You can alternatively check if the request is via the `POST` method
... if request.post?
This works for other methods as well, like `request.put?` for an update method.
Problem
Is there a way to detect if a form is submitted? Im trying to set a class based on a custom validation something like below example, is that possible? ``` .control-group{ :class => ("error" if form_is_submitted ) } ``` Now trying : ``` .control-group{ :class => ("error" if params[:user][:profile_attributes][:gender] == nil) } ``` This fails if the form is not submitted because then the params are nill and throws an error