Problem
You are using the script/dbconsole utility in Rails (with sqlite), and you want to exit the application but the usual keystrokes/commands like quit, exit, Ctrl + C don’t work.
Solution
You have to use the following keyword, paying particular notice in the leading dot (.exit):
.exit
Problem
You want to work with sqlite3 in Mandriva (2009), but the standard installation doesn’t work, and you cannot use urpmi sqlite3.
Solution
You need to install the sqlite3 command line tools, like:
urpmi sqlite3-tools
Problem
You have recently installed Mandriva 2009 and you want to install phusion passenger.
Solution
urpmi apache
On the selection question about the dependencies select option 1 (apache-prefork)
gem install passenger
passenger-install-apache2-module
urpmi gcc_c++
urpmi apache-devel
<VirtualHost *:80> ServerName www.yourhost.com DocumentRoot /somewhere/public </VirtualHost>
Problem
Trying to use the assert_difference with Rails 2.1.0 produces errors if trying to use it with the syntax of another rails version.
Solution
The correct syntax for using assert_difference with rails 2.1.0 is:
def test_should_create_user
assert_difference(User, :count, 1) do
user = create_user
assert !user.new_record?, "#{user.errors.full_messages.to_sentence}"
end
end
Problem
When trying to use the acts_as_ferret plugin in a search page by using the find_by_contents method then the following error appears:
undefined method `find_by_contents'
Solution
It seems that the API of the plugin has changed, and the
find_by_contents
method should be replaced with the:
find_with_ferret
method
Problem
After a recent upgrade to a newer rails version the gem package manager seems to be broken. Everytime you try to use gem install gem_name, you get the following error:
ERROR: While executing gem ... (Gem::GemNotFoundException)
Deleting the cached files as suggested in other posts results in the error:
ERROR: While executing gem ... (ArgumentError)
Solution
As suggested here, you need to do:
gem install rubygems-update update_rubygems
which should be updating the gem version to the latest one, ie 1.3.0
Problem
When trying to use facebooker according to the Developing facebook platform applications with rails book, in the network_test step you are getting the following error:
FBML Error (line 5): illegal tag "body" under "fb:canvas"
Solution
It should be caused because you are using the facebooker gem instead of the plugin.
Install the plugin:
ruby script/plugin install git://github.com/mmangino/facebooker.git
Problem
You want to install the git (Fast version control system) in Mandriva, but using:
urpmi git
installs the GNU Interactive Tools.
Solution
Use the following to install the version control system
urpmi git-core
Problem
Following from a previous post about email scheduling with runner and cron, it turns out that the runner default behaviour is to run in the development environment.
Solution
Although by reading the help for the script/runner, there is a suggestion to run it with the -e production
added to the end, it doesn’t seem to be working.
The solution to make it running in the production environment was to delete the first line (shebang) from step 3 on this post
#!/usr/bin/env /path_to_your_app/script/runner
and then use the following in the cron setup:
RAILS_ENV=production /path/to/your_ror_project/script/runner /path/to/your_ror_project/lib/email_scheduler.rb
Have a look on paragraph Alternative Usage here
Problem
With the imminent upgrade in Dreamhost to Rails 2.1.1 (dreamhost blog post here), you may want to freeze your Rails version to a previous version, using capistrano.
Solution
On your local development pc freeze the rails:
rake rails:freeze:gems
Add the new code to your svn repository:
svn commit -m 'freeze rails'
And then deploy to dreamhost using capistrano:
cap deploy
Your rails project located on dreamhost should be frozen to your current Rails version.