I'm following the instructions in rails tutorial and got stuck when trying to use the scaffold command.
When running:
rails generate scaffold User name:string email:string
I get the error:
C:/RailsInstaller/Ruby1.9.2/lib/ruby/gems/1.9.1/gems/activerecord-3.1.0/lib/active_record/connection_adapters/abstract/connection_specification.rb:71:in `rescue in establish_connection': Please install the sqlite3 adapter: `gem install activerecord-sqlite3-adapter` (can't activate sqlite3 (~> 1.3.4), already activated sqlite3-1.3.3-x86-mingw32. Make sure all dependencies are added to Gemfile.) (RuntimeError)
Running:
gem install activerecord-sqlite3-adapter
I got the error:
ERROR: Could not find a valid gem 'activerecord-sqlite3-adapter' (>= 0) in any repository
ERROR: Possible alternatives: activerecord-jdbcsqlite3-adapter, activerecord-sqlserver-adapter, activerecord-nulldb-adapter, activerecord-spatialite-adapter, activerecord-simpledb-adapter
My Gemfile looks like this:
source 'http://rubygems.org'
gem 'rails', '3.1.0'
gem 'sqlite3', '1.3.3'
...
I'm running on Windows 7 x64 OS.
Any ideas?
Ok I found the problem. I noticed that my Rails installation has both SQLite 1.3.3 and 1.3.4 I changed my Gemfile from:
gem 'sqlite3', '1.3.3'
to:
gem 'sqlite3', '1.3.4'
That solved the problem. Thanks @holger-just for pointing me to the relevant line in the error message in their answer.
suggested install command:
gem install activerecord-jdbc-sqlite3-adapter
actual install command:
gem install activerecord-jdbcsqlite3-adapter
Reference: http://kenai.com/jira/browse/ACTIVERECORD_JDBC-19
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