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couchrest_model
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Refinements to dirty tracking so always enabled unless loading from the database

master
Sam Lown 2011-04-20 12:31:46 +02:00
parent 1bced3b207 634813858e
commit b3e8fbadc6
13 changed files with 54 additions and 124 deletions
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2
VERSION
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@ -1 +1 @@
1.1.0.beta2
1.1.0.beta3

2
benchmarks/dirty.rb
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@ -111,8 +111,8 @@ begin
run_benchmark
end
set_dirty(false)
puts "\nwith use_dirty false"
end
puts "\nwith use_dirty false"
run_benchmark
end

1
history.txt
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@ -1,6 +1,7 @@
== 1.1.0.beta3
* Major changes:
* Fast Dirty Tracking! Many thanks to @sobakasu (Andrew Williams)
* Default CouchRest Model type field now set to 'model' instead of 'couchrest-type'.
* Minor enhancements:

4
lib/couchrest/model/base.rb
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@ -40,10 +40,6 @@ module CouchRest
subclasses << subklass
end
# Accessors
attr_accessor :casted_by
# Instantiate a new CouchRest::Model::Base by preparing all properties
# using the provided document hash.
#

14
lib/couchrest/model/casted_model.rb
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@ -11,31 +11,31 @@ module CouchRest::Model
include CouchRest::Model::Associations
include CouchRest::Model::Validations
include CouchRest::Model::Dirty
attr_accessor :casted_by
# attr_accessor :casted_by
end
def initialize(keys = {})
raise StandardError unless self.is_a? Hash
prepare_all_attributes(keys)
super()
end
def []= key, value
couchrest_attribute_will_change!(key) if use_dirty && self[key] != value
couchrest_attribute_will_change!(key) if self[key] != value
super(key.to_s, value)
end
def [] key
super(key.to_s)
end
# Gets a reference to the top level extended
# document that a model is saved inside of
def base_doc
return nil unless @casted_by
@casted_by.base_doc
end
# False if the casted model has already
# been saved in the containing document
def new?

2
lib/couchrest/model/configuration.rb
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@ -11,13 +11,11 @@ module CouchRest
add_config :model_type_key
add_config :mass_assign_any_attribute
add_config :auto_update_design_doc
add_config :use_dirty
configure do |config|
config.model_type_key = 'model' # was 'couchrest-type'
config.mass_assign_any_attribute = false
config.auto_update_design_doc = true
config.use_dirty = true
end
end

6
lib/couchrest/model/dirty.rb
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@ -22,7 +22,7 @@ module CouchRest
def use_dirty?
bdoc = base_doc
bdoc && bdoc.use_dirty && !bdoc.disable_dirty
bdoc && !bdoc.disable_dirty
end
def couchrest_attribute_will_change!(attr)
@ -30,13 +30,13 @@ module CouchRest
attribute_will_change!(attr)
couchrest_parent_will_change!
end
def couchrest_parent_will_change!
@casted_by.couchrest_attribute_will_change!(casted_by_attribute) if @casted_by
end
private
# return the attribute name this object is referenced by in the parent
def casted_by_attribute
return @casted_by_attribute if @casted_by_attribute

2
lib/couchrest/model/persistence.rb
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@ -30,7 +30,7 @@ module CouchRest
def update(options = {})
raise "Calling #{self.class.name}#update on document that has not been created!" if self.new?
return false unless perform_validations(options)
return true if use_dirty? && !self.changed?
return true if !self.changed?
_run_update_callbacks do
_run_save_callbacks do
result = database.save_doc(self)

53
lib/couchrest/model/properties.rb
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@ -6,9 +6,9 @@ module CouchRest
included do
extlib_inheritable_accessor(:properties) unless self.respond_to?(:properties)
extlib_inheritable_accessor(:prop_by_name) unless self.respond_to?(:prop_by_name)
extlib_inheritable_accessor(:property_by_name) unless self.respond_to?(:property_by_name)
self.properties ||= []
self.prop_by_name ||= {}
self.property_by_name ||= {}
raise "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 (method_defined?(:[]) && method_defined?(:[]=))
end
@ -39,19 +39,12 @@ module CouchRest
end
# Store a casted value in the current instance of an attribute defined
# with a property.
# with a property and update dirty status
def write_attribute(property, value)
prop = find_property!(property)
self[prop.to_s] = prop.is_a?(String) ? value : prop.cast(self, value)
end
# write property, update dirty status
def write_attribute_dirty(property, value)
prop = find_property!(property)
value = prop.is_a?(String) ? value : prop.cast(self, value)
propname = prop.to_s
attribute_will_change!(propname) if use_dirty? && self[propname] != value
self[propname] = value
attribute_will_change!(prop.name) if use_dirty? && self[prop.name] != value
self[prop.name] = value
end
def []=(key,value)
@ -82,34 +75,47 @@ module CouchRest
# Remove any protected and update all the rest. Any attributes
# which do not have a property will simply be ignored.
attrs = remove_protected_attributes(hash)
directly_set_attributes(attrs, :dirty => true)
directly_set_attributes(attrs)
end
alias :attributes= :update_attributes_without_saving
# 'attributes' needed for Dirty
alias :attributes :properties_with_values
def set_attributes(hash)
attrs = remove_protected_attributes(hash)
directly_set_attributes(attrs)
end
protected
def find_property(property)
property.is_a?(Property) ? property : self.class.prop_by_name[property.to_s]
property.is_a?(Property) ? property : self.class.property_by_name[property.to_s]
end
# The following methods should be accessable by the Model::Base Class, but not by anything else!
def apply_all_property_defaults
return if self.respond_to?(:new?) && (new? == false)
# TODO: cache the default object
# Never mark default options as dirty!
dirty, self.disable_dirty = self.disable_dirty, true
self.class.properties.each do |property|
write_attribute(property, property.default_value)
end
self.disable_dirty = dirty
end
def prepare_all_attributes(doc = {}, options = {})
self.disable_dirty = !!options[:directly_set_attributes]
apply_all_property_defaults
if options[:directly_set_attributes]
directly_set_read_only_attributes(doc)
else
doc = remove_protected_attributes(doc)
end
directly_set_attributes(doc) unless doc.nil?
res = doc.nil? ? doc : directly_set_attributes(doc)
self.disable_dirty = false
res
end
def find_property!(property)
@ -120,9 +126,8 @@ module CouchRest
# Set all the attributes and return a hash with the attributes
# that have not been accepted.
def directly_set_attributes(hash, options = {})
self.disable_dirty = !options[:dirty]
ret = hash.reject do |attribute_name, attribute_value|
def directly_set_attributes(hash)
hash.reject do |attribute_name, attribute_value|
if self.respond_to?("#{attribute_name}=")
self.send("#{attribute_name}=", attribute_value)
true
@ -133,8 +138,6 @@ module CouchRest
false
end
end
self.disable_dirty = false
ret
end
def directly_set_read_only_attributes(hash)
@ -147,10 +150,6 @@ module CouchRest
end
end
def set_attributes(hash)
attrs = remove_protected_attributes(hash)
directly_set_attributes(attrs)
end
module ClassMethods
@ -206,14 +205,14 @@ module CouchRest
end
type = [type] # inject as an array
end
property = Property.new(name, type, options.merge(:use_dirty => use_dirty))
property = Property.new(name, type, options)
create_property_getter(property)
create_property_setter(property) unless property.read_only == true
if property.type_class.respond_to?(:validates_casted_model)
validates_casted_model property.name
end
properties << property
prop_by_name[property.to_s] = property
property_by_name[property.to_s] = property
property
end
@ -247,7 +246,7 @@ module CouchRest
property_name = property.name
class_eval <<-EOS
def #{property_name}=(value)
write_attribute_dirty('#{property_name}', value)
write_attribute('#{property_name}', value)
end
EOS

7
lib/couchrest/model/property.rb
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@ -4,7 +4,7 @@ module CouchRest::Model
include ::CouchRest::Model::Typecast
attr_reader :name, :type, :type_class, :read_only, :alias, :default, :casted, :init_method, :use_dirty, :options
attr_reader :name, :type, :type_class, :read_only, :alias, :default, :casted, :init_method, :options
# Attribute to define.
# All Properties are assumed casted unless the type is nil.
@ -38,8 +38,8 @@ module CouchRest::Model
end
arr = value.collect { |data| cast_value(parent, data) }
# allow casted_by calls to be passed up chain by wrapping in CastedArray
value = (use_dirty || type_class != String) ? CastedArray.new(arr, self) : arr
value.casted_by = parent if value.respond_to?(:casted_by)
value = CastedArray.new(arr, self)
value.casted_by = parent
elsif (type == Object || type == Hash) && (value.class == Hash)
# allow casted_by calls to be passed up chain by wrapping in CastedHash
value = CouchRest::Model::CastedHash[value]
@ -94,7 +94,6 @@ module CouchRest::Model
@alias = options.delete(:alias) if options[:alias]
@default = options.delete(:default) unless options[:default].nil?
@init_method = options[:init_method] ? options.delete(:init_method) : 'new'
@use_dirty = options.delete(:use_dirty)
@options = options
end

77
spec/couchrest/dirty_spec.rb
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@ -14,88 +14,25 @@ class WithCastedModelMixin < Hash
end
class DummyModel < CouchRest::Model::Base
use_database TEST_SERVER.default_database
raise "Default DB not set" if TEST_SERVER.default_database.nil?
use_database DB
property :casted_attribute, WithCastedModelMixin
property :title, :default => 'Sample Title'
property :details, Object, :default => { 'color' => 'blue' }
property :keywords, [String], :default => ['default-keyword']
property :sub_models do |child|
child.property :title
property :sub_models do
property :title
end
end
# set dirty configuration, return previous configuration setting
def set_dirty(value)
orig = nil
CouchRest::Model::Base.configure do |config|
orig = config.use_dirty
config.use_dirty = value
end
Card.instance_eval do
self.use_dirty = value
end
orig
end
describe "With use_dirty(off)" do
before(:all) do
@use_dirty_orig = set_dirty(false)
end
# turn dirty back to default
after(:all) do
set_dirty(@use_dirty_orig)
end
describe "changes" do
it "should not respond to the changes method" do
@card = Card.new
@card.first_name = "andrew"
@card.changes.should == {}
end
end
describe "changed?" do
it "should not record changes" do
@card = Card.new
@card.first_name = "andrew"
@card.changed?.should be_false
end
end
describe "save" do
it "should save unchanged records" do
@card = Card.create!(:first_name => "matt")
@card = Card.find(@card.id)
@card.database.should_receive(:save_doc).and_return({"ok" => true})
@card.save
end
end
end
describe "With use_dirty(on)" do
before(:all) do
@use_dirty_orig = set_dirty(true)
end
# turn dirty back to default
after(:all) do
set_dirty(@use_dirty_orig)
end
describe "Dirty" do
describe "changes" do
it "should return changes on an attribute" do
@card = Card.new(:first_name => "matt")
@card.first_name = "andrew"
@card.first_name_changed?.should be_true
@card.changes.should == { "first_name" => ["matt", "andrew"] }
end

4
spec/couchrest/property_spec.rb
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@ -357,10 +357,10 @@ describe "Property Class" do
property.cast(parent, ["2010-06-01", "2010-06-02"]).class.should eql(CouchRest::Model::CastedArray)
end
it "should not set a CastedArray on array of Strings" do
it "should set a CastedArray on array of Strings" do
property = CouchRest::Model::Property.new(:test, [String])
parent = mock("FooObject")
property.cast(parent, ["2010-06-01", "2010-06-02"]).class.should_not eql(CouchRest::Model::CastedArray)
property.cast(parent, ["2010-06-01", "2010-06-02"]).class.should eql(CouchRest::Model::CastedArray)
end
it "should raise and error if value is array when type is not" do

4
spec/fixtures/more/card.rb vendored
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@ -7,10 +7,10 @@ class Card < CouchRest::Model::Base
property :last_name, :alias => :family_name
property :read_only_value, :read_only => true
property :cast_alias, Person, :alias => :calias
property :fg_color, :default => '#000'
timestamps!
# Validation
validates_presence_of :first_name