wrong number of arguments (3 for 2) in rails 4

Question

i am updating my app to rails 4 i am using

<%= form_for @application do |f|%>
<%end-%>

for the form tag but it always gives me

wrong number of arguments (3 for 2)

Answer 1

To install "Client side validations" with simple_form successfully, you should check for latest versions direct from Github with latest branch.

The released gems don't work with Rails >= 4.0

gem 'client_side_validations', github: 'DavyJonesLocker/client_side_validations'
gem 'client_side_validations-simple_form', github: 'DavyJonesLocker/client_side_validations-simple_form'

Make sure your gem file does not use these versions

client-side Validation 3.2.5
client_side_validations-simple_form 2.1.0

These versions does not support rails 4.2.0

For more detail please check this link, https://github.com/DavyJonesLocker/client_side_validations-simple_form/issues/41

Answer 2

If your using Rails 4 then Client Side validation is outdated. You can check here

http://railscasts.com/episodes/263-client-side-validations?view=comments

and also if you go to the github page

https://github.com/bcardarella/client_side_validations

you can see that it says its no longer maintained.

Alternatively you can try using the CSV gem from this branch, by replacing the CSV line in your Gemfile by this

gem 'client_side_validations', github: "bcardarella/client_side_validations", :branch => "4-0-beta"

Not sure even if this will work though. Since its outdated.

Or you can check this gem out,

https://github.com/kalkov/rails4_client_side_validations

Its just a modified version of Client Side Validations

And for the whitespace stuff. lol. It can be used both at the beginning or at the end of the <% end %> tag. Its only for earlier version of Rails since in Rails 3 its no longer necessary.If an erb tag has no output it will automatically be stripped away so there’s no unnecessary whitespace where the erb tags were.

Answer 3

I got the same error, it was due to client_side_validation gem. This gem is conflicting with form_for in rails 4

Answer 4

the problem could be here

<%end-%>

as it should be

<%end%> #no hyphen after the 'd'

However, I'm not sure why it would throw that error if that were the case. Is there anything between form_for and end?