rails gem Simple_form installation is not working

Question

I am using rails 4.2.4 and I am trying to use simple_form

Right now my view gives the error:

undefined method `simple_form_for' for #<#<Class:0xbbc2748>:0xbbc1460>

Gem list returns a list of gems and it includes simple_form. I installed simple_form by typing gem install simple_form

$gem list 

returns

simple_form (3.2.1)

I have also tried and got this:

rails generate simple_form:install --bootstrap
Could not find generator 'simple_form:install'. Maybe you meant 'responders:install', 'rspec:install' or 'devise:install'
Run `rails generate --help` for more options.

Does anyone know how to fix this issue?

Answer 1

If you just installed it via gem install you didn't add it to your Rails application. Instead, you need to add it to your Gemfile , look at the documentation .

Gemfile:

gem 'simple_form'

Then run bundle install and continue with the installation from the Github page.

Answer 2

You need to add it to your Gemfile, and then bundle. Rails uses bundler for gem management, and will only include gems that are included in your Gemfile.

Answer 3

I had exactly the same problem. But I putted a gem 'simple_form' in my Gemfile. I fixed the problem with a spring stop command.