Module: Relaxo::Model::Base

Defined in:
lib/relaxo/model/base.rb

Constant Summary collapse

DEFAULT_VIEW_OPTIONS = 
{:include_docs => true}
DEFAULT_RELATIONSHIP_OPTIONS = 
{
	:key => lambda {|object, query| query[:key] = object.id},
	:include_docs => true
}

Instance Attribute Summary collapse

Class Method Summary collapse

Instance Method Summary collapse

Instance Attribute Details

#properties ⇒ Object (readonly)

Returns the value of attribute properties.



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# File 'lib/relaxo/model/base.rb', line 40

def properties
  @properties
end

#relationships ⇒ Object (readonly)

Returns the value of attribute relationships.



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# File 'lib/relaxo/model/base.rb', line 41

def relationships
  @relationships
end

#type ⇒ Object (readonly)

Returns the value of attribute type.



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# File 'lib/relaxo/model/base.rb', line 39

def type
  @type
end

Class Method Details

.extended(child) ⇒ Object 



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# File 'lib/relaxo/model/base.rb', line 26

def self.extended(child)
	# $stderr.puts "#{self} extended -> #{child} (setup Base)"
	child.instance_variable_set(:@properties, {})
	child.instance_variable_set(:@relationships, {})

	default_type = child.name.split('::').last.gsub(/(.)([A-Z])/,'\1_\2').downcase!
	child.instance_variable_set(:@type, default_type)
end

Instance Method Details

#metaclass ⇒ Object 



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# File 'lib/relaxo/model/base.rb', line 35

def metaclass
	class << self; self; end
end

#property(name, klass = nil) ⇒ Object 



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# File 'lib/relaxo/model/base.rb', line 94

def property(name, klass = nil)
	name = name.to_s

	@properties[name] = klass

	self.send(:define_method, name) do
		if @changed.include? name
			return @changed[name]
		elsif @attributes.include? name
			if klass
				value = @attributes[name]

				@changed[name] = klass.convert_from_primative(@database, value)
			else
				@changed[name] = @attributes[name]
			end
		else
			nil
		end
	end

	self.send(:define_method, "#{name}=") do |value|
		@changed[name] = value
	end
	
	self.send(:define_method, "#{name}?") do
		value = self.send(name)
		
		if value == nil || value == false
			false
		elsif value.respond_to? :empty?
			!value.empty?
		else
			true
		end
	end
end

#relationship(name, path, *args, &block) ⇒ Object 



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# File 'lib/relaxo/model/base.rb', line 60

def relationship(name, path, *args, &block)
	options = Hash === args.last ? args.pop : DEFAULT_RELATIONSHIP_OPTIONS
	klass = block || args.pop || options[:class]

	@relationships[name] = options

	# This reduction returns a single result, so just provide the first row directly:
	reduction = options.delete(:reduction)

	options = options.dup

	update_key_function(options, :key)
	update_key_function(options, :startkey)
	update_key_function(options, :endkey)

	self.send(:define_method, name) do |query = {}|
		query = query.merge(options)

		[:key, :startkey, :endkey].each do |name|
			if options[name].respond_to? :call
				options[name].call(self, query)
			end
		end

		recordset = Recordset.new(@database, @database.view(path, query), klass)

		if reduction == :first
			recordset.first
		else
			recordset
		end
	end
end

#view(name, path, *args) ⇒ Object 



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# File 'lib/relaxo/model/base.rb', line 45

def view(name, path, *args)
	options = Hash === args.last ? args.pop : DEFAULT_VIEW_OPTIONS
	klass = args.pop || options[:class]

	self.metaclass.send(:define_method, name) do |database, query = {}|
		records = database.view(path, query.merge(options))
		Recordset.new(database, records, klass)
	end
end