Module: CouchRest::Mixins::Properties

Defined in:
lib/couchrest/mixins/properties.rb

Defined Under Namespace

Modules: ClassMethods Classes: IncludeError

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.included(base) ⇒ Object

Raises:



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# File 'lib/couchrest/mixins/properties.rb', line 29

def self.included(base)
  base.class_eval <<-EOS, __FILE__, __LINE__ + 1
      extlib_inheritable_accessor(:properties) unless self.respond_to?(:properties)
      self.properties ||= []
  EOS
  base.extend(ClassMethods)
  raise CouchRest::Mixins::Properties::IncludeError, "You can only mixin Properties in a class responding to [] and []=, if you tried to mixin CastedModel, make sure your class inherits from Hash or responds to the proper methods" unless (base.new.respond_to?(:[]) && base.new.respond_to?(:[]=))
end

Instance Method Details

#apply_defaults ⇒ Object 



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# File 'lib/couchrest/mixins/properties.rb', line 38

def apply_defaults
  return if self.respond_to?(:new?) && (new? == false)
  return unless self.class.respond_to?(:properties) 
  return if self.class.properties.empty?
  # TODO: cache the default object
  self.class.properties.each do |property|
    key = property.name.to_s
    # let's make sure we have a default
    unless property.default.nil?
        if property.default.class == Proc
          self[key] = property.default.call
        else
          self[key] = Marshal.load(Marshal.dump(property.default))
        end
      end
  end
end

#associate_casted_to_parent(casted, assigned) ⇒ Object 



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# File 'lib/couchrest/mixins/properties.rb', line 94

def associate_casted_to_parent(casted, assigned)
  casted.casted_by = self if casted.respond_to?(:casted_by)
  casted.document_saved = true if !assigned && casted.respond_to?(:document_saved)
end

#cast_float(value) ⇒ Object 



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# File 'lib/couchrest/mixins/properties.rb', line 121

def cast_float(value)
  begin 
    Float(value)
  rescue
    value
  end
end

#cast_keys ⇒ Object 



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# File 'lib/couchrest/mixins/properties.rb', line 56

def cast_keys
  return unless self.class.properties
  self.class.properties.each do |property|
    cast_property(property)
  end
end

#cast_property(property, assigned = false) ⇒ Object 



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# File 'lib/couchrest/mixins/properties.rb', line 63

def cast_property(property, assigned=false)
  return unless property.casted
  key = self.has_key?(property.name) ? property.name : property.name.to_sym
  # Don't cast the property unless it has a value
  return unless self[key]
  if property.type.is_a?(Array)
    klass = ::CouchRest.constantize(property.type[0])
    arr = self[key].dup.collect do |value|
      unless value.instance_of?(klass)
        value = convert_property_value(property, klass, value)
      end
      associate_casted_to_parent(value, assigned)
      value
    end
    self[key] = klass != String ? CastedArray.new(arr) : arr
    self[key].casted_by = self if self[key].respond_to?(:casted_by)
  else
    if property.type == 'boolean'
      klass = TrueClass
    else
      klass = ::CouchRest.constantize(property.type)
    end
    
    unless self[key].instance_of?(klass)
      self[key] = convert_property_value(property, klass, self[property.name])
    end
    associate_casted_to_parent(self[property.name], assigned)
  end
  
end

#cast_property_by_name(property_name) ⇒ Object 



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# File 'lib/couchrest/mixins/properties.rb', line 114

def cast_property_by_name(property_name)
  return unless self.class.properties
  property = self.class.properties.detect{|property| property.name == property_name}
  return unless property
  cast_property(property, true)
end

#convert_property_value(property, klass, value) ⇒ Object 



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# File 'lib/couchrest/mixins/properties.rb', line 99

def convert_property_value(property, klass, value)
  if ((property.init_method == 'new') && klass == Time)
    # Using custom time parsing method because Ruby's default method is toooo slow
    value.is_a?(String) ? Time.mktime_with_offset(value.dup) : value
  # Float instances don't get initialized with #new
  elsif ((property.init_method == 'new') && klass == Float)
    cast_float(value)
    # 'boolean' type is simply used to generate a property? accessor method
  elsif ((property.init_method == 'new') && klass == TrueClass)
    value
  else
    klass.send(property.init_method, value.dup)
  end
end