Custom Rake Task To Unload Fixtures
I made a revised version of a rake task that I have used quite often, for unloading existing DB tables into fixture data and thought I would share. This rake task is the in correct name space and adds a "rake db:fixtures:unload" command to your rails project when you put this in "lib/tasks/foo.rake". It can take an optional TABLES variable or if none is present the whole array of DB tables are converted. I find this rake task helpful when dealing with LARGE databases.
namespace :db do
namespace :fixtures do
desc 'Create YAML test fixtures from data in specifed tables. Set table names by TABLES=foos,bars,etc'
task :unload => :environment do
sql = "SELECT * FROM %s"
tables = ["schema_info"]
ActiveRecord::Base.establish_connection
(ENV['TABLES'] ? ENV['TABLES'].split(/,/) : ActiveRecord::Base.connection.tables).each do |table_name|
i = "000"
File.open("#{RAILS_ROOT}/test/fixtures/#{table_name}.yml", 'w') do |file|
data = ActiveRecord::Base.connection.select_all(sql % table_name)
file.write data.inject({}) { |hash, record|
hash["#{table_name}_#{i.succ!}"] = record
hash
}.to_yaml
end
end
end
end
end