bootstrap_form error undefined method

Question

1- I installed gem bootstrap_form
2- I wrote in application.css that line *= require bootstrap_form before the */
3- in my html.erb

<%= bootstrap_form_for(@guardian, :url => student_guardians_path(@student),
html: { class: 'form-horizontal' },
method: :post) do |f| %>

And I am getting the following error : undefined methodbootstrap_form_for' for #<#:0xb31a80c>`

Answer 1

I was getting the same error. Fixed it by replacing

gem 'bootstrap-form'

by

gem 'bootstrap_form'

in my gemfile

Answer 2

I recently had this issue and my problem was that bundle install seemed to be pulling v3.0.0, yet the most recent version on GitHub is listed as 2.3.0. Changing the appropriate line in my Gemfile to:

gem 'bootstrap_form', '~> 2.3.0'

Fixed the issue.

Answer 3

I too was getting this error until I realized that I didn't restart the rails server. When I restarted the server, the error disappeared.