CODEWITHSUNDEEP
ruby-on-rails
Slevin
Slevin

Reputation: 4232

Rails: validate form fields step by step

I'm trying to validate different input values. For example "domain" and "email". Both have to have a value and must be unique. So i try to validate them with

validates :domain,
          :presence => true,
          :uniqueness => { :case_sensitive => true }
validates :email,
          :presence => true,
          :uniqueness => { :case_sensitive => true }

But when i display the flash messages, i get four errors:

["Domain can't be blank", "Domain has already been taken", "Email can't be blank", "Email has already been taken"]

Is it possible to check them gradually? If the input field has no value, the user gets

["Domain can't be blank"]

but if the input field has a value and isn't unique, the user gets

["Domain has already been taken"]

How can i implement it?

Edit

Heres the code that prints the error messages:

<% [:error].each do |key| %>
  <% if flash[key] %>
    <div class="<%= key %>" id="flash">
      <%= flash[key] %>
    </div>
  <% end %>
<% end %>

And here the controller that creates the errors:

def create

  respond_to do |format|
    # save form data
    @login = Login.new(params[:login])

    # if validation fails, throw error messages
    if [email protected]
      flash[:error] = @login.errors.to_a
    end

    # redirect to landingpage
   format.html { redirect_to :root }

  end

end

Upvotes: 0

Views: 1799

Answers (1)

knownasilya
knownasilya

Reputation: 6153

flash[:error] will display all errors if you don't first call @user.valid? or @user.invalid? which will then return the errors that pertain to that @person object.

See the Rails guides on how to use the Flash. Also the validation errors section.

Give this a try:

if [email protected]       
  flash[:error] = @login.errors.to_a if @login.invalid?
end

Upvotes: 2

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