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-23,25
+23,28
class Setting < ActiveRecord::Base
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23
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validates_uniqueness_of :name
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23
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validates_uniqueness_of :name
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validates_inclusion_of :name, :in => @@available_settings.keys
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validates_inclusion_of :name, :in => @@available_settings.keys
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25
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validates_numericality_of :value, :only_integer => true, :if => Proc.new { |setting| @@available_settings[setting.name]['format'] == 'int' }
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25
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validates_numericality_of :value, :only_integer => true, :if => Proc.new { |setting| @@available_settings[setting.name]['format'] == 'int' }
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26
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26
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def self.get(name)
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# Hash used to cache setting values
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name = name.to_s
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28
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@cached_settings = {}
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setting = find_by_name(name)
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@cached_cleared_on = Time.now
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setting ||= new(:name => name, :value => @@available_settings[name]['default']) if @@available_settings.has_key? name
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30
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setting
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# Returns the value of the setting named name
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end
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def self.[](name)
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def self.[](name)
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get(name).value
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value = @cached_settings[name]
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value ? value : (@cached_settings[name] = find_or_default(name).value)
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end
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end
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36
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def self.[]=(name, value)
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def self.[]=(name, value)
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setting = get(name)
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setting = find_or_default(name)
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setting.value = (value ? value.to_s : "")
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setting.value = (value ? value.to_s : "")
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@cached_settings[name] = nil
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setting.save
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setting.save
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setting.value
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setting.value
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end
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end
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# Defines getter and setter for each setting
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# Then setting values can be read using: Setting.some_setting_name
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# or set using Setting.some_setting_name = "some value"
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@@available_settings.each do |name, params|
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@@available_settings.each do |name, params|
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src = <<-END_SRC
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src = <<-END_SRC
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def self.#{name}
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def self.#{name}
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@@
-58,4
+61,26
class Setting < ActiveRecord::Base
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END_SRC
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END_SRC
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class_eval src, __FILE__, __LINE__
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class_eval src, __FILE__, __LINE__
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end
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end
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# Checks if settings have changed since the values were read
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# and clears the cache hash if it's the case
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# Called once per request
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def self.check_cache
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settings_updated_on = Setting.maximum(:updated_on)
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if settings_updated_on && @cached_cleared_on <= settings_updated_on
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@cached_settings.clear
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@cached_cleared_on = Time.now
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logger.info "Settings cache cleared." if logger
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end
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end
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private
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# Returns the Setting instance for the setting named name
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# (record found in database or new record with default value)
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def self.find_or_default(name)
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name = name.to_s
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raise "There's no setting named #{name}" unless @@available_settings.has_key?(name)
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setting = find_by_name(name)
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setting ||= new(:name => name, :value => @@available_settings[name]['default']) if @@available_settings.has_key? name
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end
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61
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end
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86
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end
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