This is the inverse of
db:fixtures:load. I modified the version I found to take the
FIXTURES environment variable as a parameter. Saved as
gist 440058.
# extract_fixtures.rake
# by Paul Schreiber <paulschreiber at gmail.com>
# 15 June 2010
#
# I got this from Peter Gulezian <http://metoca.net/>
# Looks like another version is here
# <http: //redmine.rubyforge.org/svn/trunk/lib/tasks/extract_fixtures.rake>
#
# This is the inverse of the built-in rake db:fixtures:load
#
# Usage: rake db:fixtures:extract
# rake db:fixtures:extract FIXTURES=foo
# rake db:fixtures:extract FIXTURES=foo,bar
#
desc ‘Create YAML test fixtures from data in an existing database.
Defaults to development database. Set RAILS_ENV to override.’
namespace :db do
namespace :fixtures do
task :extract => :environment do
sql = “SELECT * FROM %s”
skip_tables = [“schema_migrations”]
ActiveRecord::Base.establish_connection
if ENV[“FIXTURES”]
tables = ENV[“FIXTURES”].split(“,”)
else
tables = (ActiveRecord::Base.connection.tables – skip_tables)
end
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