Hi all,
At the beginning of the year I decided to take up coding. I’ve heard that RoR is a great way to start, and so my searches led me to the getting started guide on the rubyonrails website. I started working through the getting started guide today and came across two points in which I experienced problems.
Problem 1.) When executing the rake db:create command I received the following error:
Michaels-MacBook:config username$ rake db:create
(in /Users/username/Documents/experiments/blog)
rake aborted!
Please install the postgresql adapter: gem install activerecord-postgresql-adapter (pg is not part of the bundle. Add it to Gemfile.)
/Users/username/.rvm/gems/ruby-1.9.3-p385@global/gems/bundler-1.2.4/lib/bundler/rubygems_integration.rb:147:in block in replace_gem' /Users/username/.rvm/gems/ruby-1.9.3-p385/gems/activerecord-3.2.12/lib/active_record/connection_adapters/postgresql_adapter.rb:7:in <top (required)>’
/Users/username/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require' /Users/username/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in block in require’
/Users/username/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:236:in load_dependency' /Users/username/.rvm/gems/ruby-1.9.3-p385/gems/activesupport-3.2.12/lib/active_support/dependencies.rb:251:in require’
/Users/username/.rvm/gems/ruby-1.9.3-p385/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/connection_specification.rb:50:in resolve_hash_connection' /Users/username/.rvm/gems/ruby-1.9.3-p385/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/connection_specification.rb:29:in spec’
/Users/username/.rvm/gems/ruby-1.9.3-p385/gems/activerecord-3.2.12/lib/active_record/connection_adapters/abstract/connection_specification.rb:130:in establish_connection' /Users/username/.rvm/gems/ruby-1.9.3-p385/gems/activerecord-3.2.12/lib/active_record/railties/databases.rake:90:in create_database’
/Users/username/.rvm/gems/ruby-1.9.3-p385/gems/activerecord-3.2.12/lib/active_record/railties/databases.rake:62:in block (3 levels) in <top (required)>' /Users/username/.rvm/gems/ruby-1.9.3-p385/gems/activerecord-3.2.12/lib/active_record/railties/databases.rake:62:in each’
/Users/username/.rvm/gems/ruby-1.9.3-p385/gems/activerecord-3.2.12/lib/active_record/railties/databases.rake:62:in block (2 levels) in <top (required)>' /Users/username/.rvm/gems/ruby-1.9.3-p385/bin/ruby_noexec_wrapper:14:in eval’
/Users/username/.rvm/gems/ruby-1.9.3-p385/bin/ruby_noexec_wrapper:14:in `’
Tasks: TOP => db:create
(See full trace by running task with --trace)
I attempted to execute the command gem install activerecord-postgresql-adapter to fix the problem, and as far as I can tell the gem install happens with no problem. I don’t know if this issue affects the second issue I’m having right now.
2.) After successfully starting my server and viewing the “Welcome Aboard” page, I execute the command to generate the controller home index, write in html to the index.html.erb file, execute the code to remove the public/index.html file, and uncomment the specified line in my routes.rb file (unlike the guide, the line in my routes.rb file reads "root :to => ‘welcome#index’ "). I save and when I try to navigate to my localhost:3000 page, I get the following error:
I’m really not sure what is going on here. I did my best to follow the instructions exactly as specified on the guide, but as far as I can tell either postgresql is the source of my problem or there is something that I am not understanding in the guide.
Thanks in advance for the help!
~Michael Vezzani