Class: Settings

Inherits:
ActiveRecord::Base
  • Object
show all
Defined in:
lib/settings.rb

Direct Known Subclasses

ScopedSettings

Defined Under Namespace

Classes: SettingNotFound

Constant Summary collapse

@@defaults = 
SettingsDefaults::DEFAULTS.with_indifferent_access

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.[](var_name) ⇒ Object

get a setting value by [] notation



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# File 'lib/settings.rb', line 55

def self.[](var_name)
  if var = target(var_name)
    var.value
  else
    @@defaults[var_name.to_s]
  end
end

.[]=(var_name, value) ⇒ Object

set a setting value by [] notation



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# File 'lib/settings.rb', line 64

def self.[]=(var_name, value)
  var_name = var_name.to_s
  
  record = target(var_name) || target_scoped.new(:var => var_name)
  record.value = value
  record.save!
  
  value
end

.all(starting_with = nil) ⇒ Object

retrieve all settings as a hash (optionally starting with a given namespace)



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# File 'lib/settings.rb', line 43

def self.all(starting_with=nil)
  options = starting_with ? { :conditions => "var LIKE '#{starting_with}%'"} : {}
  vars = target_scoped.find(:all, {:select => 'var, value'}.merge(options))
  
  result = {}
  vars.each do |record|
    result[record.var] = record.value
  end
  result.with_indifferent_access
end

.destroy(var_name) ⇒ Object

destroy the specified settings record



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# File 'lib/settings.rb', line 32

def self.destroy(var_name)
  var_name = var_name.to_s
  if self[var_name]
    target(var_name).destroy
    true
  else
    raise SettingNotFound, "Setting variable \"#{var_name}\" not found"
  end
end

.merge!(var_name, hash_value) ⇒ Object

Raises:

  • (ArgumentError) 


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# File 'lib/settings.rb', line 74

def self.merge!(var_name, hash_value)
  raise ArgumentError unless hash_value.is_a?(Hash)
  
  old_value = self[var_name] || {}
  raise TypeError, "Existing value is not a hash, can't merge!" unless old_value.is_a?(Hash)
  
  new_value = old_value.merge(hash_value)
  self[var_name] = new_value if new_value != old_value
  
  new_value
end

.method_missing(method, *args) ⇒ Object

get or set a variable with the variable as the called method



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# File 'lib/settings.rb', line 13

def self.method_missing(method, *args)
  method_name = method.to_s
  super(method, *args)
  
rescue NoMethodError
  #set a value for a variable
  if method_name =~ /=$/
    var_name = method_name.gsub('=', '')
    value = args.first
    self[var_name] = value
  
  #retrieve a value
  else
    self[method_name]
    
  end
end

.reload ⇒ Object

Deprecated!



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# File 'lib/settings.rb', line 105

def self.reload # :nodoc:
  self
end

.target(var_name) ⇒ Object 



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# File 'lib/settings.rb', line 86

def self.target(var_name)
  target_scoped.find_by_var(var_name.to_s)
end

.target_id ⇒ Object 



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# File 'lib/settings.rb', line 109

def self.target_id
  nil
end

.target_scoped ⇒ Object 



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# File 'lib/settings.rb', line 100

def self.target_scoped
  Settings.scoped_by_target_type_and_target_id(target_type, target_id)
end

.target_type ⇒ Object 



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# File 'lib/settings.rb', line 113

def self.target_type
  nil
end

Instance Method Details

#value ⇒ Object

get the value field, YAML decoded



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# File 'lib/settings.rb', line 91

def value
  YAML::load(self[:value])
end

#value=(new_value) ⇒ Object

set the value field, YAML encoded



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# File 'lib/settings.rb', line 96

def value=(new_value)
  self[:value] = new_value.to_yaml
end