Tarique questions

Tarique answers

• Cannot install spree gem - ERROR: invalid gem: package is corrupt
• Form_for "First argument in form cannot contain nil or be empty" error
• -bash: /usr/bin/virtualenvwrapper.sh: No such file or directory
• Cannot install postgres on Ubuntu (E: Unable to locate package postgresql)
• How to fix "Your Ruby version is 2.3.0, but your Gemfile specified 2.2.5" while server starting
• ImportError: No module named psycopg2