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require 'active_record'
module I18n
module Backend
# ActiveRecord model used to store actual translations to the database.
#
# This model expects a table like the following to be already set up in
# your the database:
#
# create_table :translations do |t|
# t.string :locale
# t.string :key
# t.text :value
# t.text :interpolations
# t.boolean :is_proc, :default => false
# end
#
# This model supports to named scopes :locale and :lookup. The :locale
# scope simply adds a condition for a given locale:
#
# I18n::Backend::ActiveRecord::Translation.locale(:en).all
# # => all translation records that belong to the :en locale
#
# The :lookup scope adds a condition for looking up all translations
# that either start with the given keys (joined by an optionally given
# separator or I18n.default_separator) or that exactly have this key.
#
# # with translations present for :"foo.bar" and :"foo.baz"
# I18n::Backend::ActiveRecord::Translation.lookup(:foo)
# # => an array with both translation records :"foo.bar" and :"foo.baz"
#
# I18n::Backend::ActiveRecord::Translation.lookup([:foo, :bar])
# I18n::Backend::ActiveRecord::Translation.lookup(:"foo.bar")
# # => an array with the translation record :"foo.bar"
#
# When the StoreProcs module was mixed into this model then Procs will
# be stored to the database as Ruby code and evaluated when :value is
# called.
#
# Translation = I18n::Backend::ActiveRecord::Translation
# Translation.create \
# :locale => 'en'
# :key => 'foo'
# :value => lambda { |key, options| 'FOO' }
# Translation.find_by_locale_and_key('en', 'foo').value
# # => 'FOO'
class ActiveRecord
class Translation < ::ActiveRecord::Base
TRUTHY_CHAR = "\001"
FALSY_CHAR = "\002"
set_table_name 'translations'
attr_protected :is_proc, :interpolations
serialize :value
serialize :interpolations, Array
class << self
def locale(locale)
scoped(:conditions => { :locale => locale.to_s })
end
def lookup(keys, *separator)
column_name = connection.quote_column_name('key')
keys = Array(keys).map! { |key| key.to_s }
unless separator.empty?
warn "[DEPRECATION] Giving a separator to Translation.lookup is deprecated. " <<
"You can change the internal separator by overwriting FLATTEN_SEPARATOR."
end
namespace = "#{keys.last}#{I18n::Backend::Flatten::FLATTEN_SEPARATOR}%"
scoped(:conditions => ["#{column_name} IN (?) OR #{column_name} LIKE ?", keys, namespace])
end
def available_locales
Translation.find(:all, :select => 'DISTINCT locale').map { |t| t.locale.to_sym }
end
end
def interpolates?(key)
self.interpolations.include?(key) if self.interpolations
end
def value
value = read_attribute(:value)
if is_proc
Kernel.eval(value)
elsif value == FALSY_CHAR
false
elsif value == TRUTHY_CHAR
true
else
value
end
end
def value=(value)
if value === false
value = FALSY_CHAR
elsif value === true
value = TRUTHY_CHAR
end
write_attribute(:value, value)
end
end
end
end
end
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