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__
      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_document?) && (new_document? == 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

#cast_float(value) ⇒ Object 



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# File 'lib/couchrest/mixins/properties.rb', line 93

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|
    next 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
    next unless self[key]   
    target = property.type
    if target.is_a?(Array)
      klass = ::CouchRest.constantize(target[0])
      self[property.name] = self[key].collect do |value|
        # Auto parse Time objects
        obj = ( (property.init_method == 'new') && klass == Time) ? Time.parse(value) : klass.send(property.init_method, value)
        obj.casted_by = self if obj.respond_to?(:casted_by)
        obj 
      end
    else
      # Auto parse Time objects
      self[property.name] = if ((property.init_method == 'new') && target == 'Time')
        # Using custom time parsing method because Ruby's default method is toooo slow 
        self[key].is_a?(String) ? Time.mktime_with_offset(self[key].dup) : self[key]
      # Float instances don't get initialized with #new
      elsif ((property.init_method == 'new') && target == 'Float')
        cast_float(self[key])
      # 'boolean' type is simply used to generate a property? accessor method
      elsif ((property.init_method == 'new') && target == 'boolean')
        self[key]
      else
        # Let people use :send as a Time parse arg
        klass = ::CouchRest.constantize(target)
        klass.send(property.init_method, self[key].dup)   
      end  
      self[property.name].casted_by = self if self[property.name].respond_to?(:casted_by)
    end 
    
  end
  
  def cast_float(value)
    begin 
      Float(value)
    rescue 
      value
    end
  end
  
end