stephencelis / acts_as_singleton Goto Github PK
View Code? Open in Web Editor NEWA lightweight singleton library for your Active Record models.
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logicaltext lannon whalec cratz lemmycaution iquest prabode crmaxx pmq20 yuszuv kouyaf77 sameertotey mtakac2 noiges kevin-klein prmtech kickback alessandro7 nytmarkservices jeffborg 4ormat davidlbean onlinetocodeacts_as_singleton's Issues
Possible thread-safety issue
the instance method should be
def instance
self.transaction { first || create }
endthereby preventing more than one record from being create'ed
Form Helpers
Trying to make a form with a singleton model using form_for doesn't really work. It'd be nice if it did work.
rails 3 compatibility
The code below is running perfectly well with rails 2.3.5 but not with rails 3.0.0.4beta:
class FeaturedMember < ActiveRecord::Base
acts_as_singleton
belongs_to :user
end
( $ ) rails c
Loading development environment (Rails 3.0.0.beta4)
irb(main):001:0> FeaturedMember.instance
NoMethodError: private method find_by_sql' called for #<Class:0xb5bde13c> from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/base.rb:1016:inmethod_missing' from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/relation.rb:64:in to_a' from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/relation/finder_methods.rb:324:infind_first' from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/relation/finder_methods.rb:117:in first' from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/base.rb:403:insend' from /usr/lib/ruby/gems/1.8/gems/activerecord-3.0.0.beta4/lib/active_record/base.rb:403:in first' from /usr/lib/ruby/gems/1.8/gems/acts_as_singleton-0.0.4/lib/acts_as_singleton.rb:43:ininstance' from (irb):1
irb(main):002:0>
SubclassNotFound when using acts_as_singleton with ActiveRecord inheritance
Hi,
I have the following setup:
class VirtualPlaylist < ActiveRecord::Base; acts_as_singleton; end
class MyFavorites < VirtualPlaylist; end
class RecentlyPlayedSongs < VirtualPlaylist; end
Accessing the singletons fails in this case with the following error:
musicsocial> VirtualPlaylist.instance
=> #<VirtualPlaylist name: nil, type: nil>
musicsocial> MyFavorites.instance
=> #<MyFavorites name: nil, type: "MyFavorites">
musicsocial> MyFavorites.instance
ActiveRecord::SubclassNotFound: The single-table inheritance mechanism failed to locate the subclass: 'MyFavorites'. This error is raised because the column 'type' is reserved for storing the class in case of inheritance. Please rename this column if you didn't intend it to be used for storing the inheritance class or overwrite MyFavorites.inheritance_column to use another column for that information.
from /Users/karl/projects/musicsocial/vendor/rails/activerecord/lib/active_record/base.rb:1637:in `instantiate_without_polymorphic_checks'
from /Users/karl/projects/musicsocial/vendor/plugins/has_many_polymorphs/lib/has_many_polymorphs/base.rb:52:in `instantiate'
from /Users/karl/projects/musicsocial/vendor/rails/activerecord/lib/active_record/base.rb:661:in `find_by_sql'
from /Users/karl/projects/musicsocial/vendor/rails/activerecord/lib/active_record/base.rb:661:in `collect!'
from /Users/karl/projects/musicsocial/vendor/rails/activerecord/lib/active_record/base.rb:661:in `find_by_sql'
from /Users/karl/projects/musicsocial/vendor/rails/activerecord/lib/active_record/base.rb:1548:in `find_every'
from /Users/karl/projects/musicsocial/vendor/rails/activerecord/lib/active_record/base.rb:1505:in `find_initial'
from /Users/karl/projects/musicsocial/vendor/rails/activerecord/lib/active_record/base.rb:613:in `find'
from /Users/karl/projects/musicsocial/vendor/rails/activerecord/lib/active_record/base.rb:623:in `first'
from /Users/karl/projects/musicsocial/vendor/plugins/acts_as_singleton/lib/acts_as_singleton.rb:42:in `instance'
from (irb):4
However if I comment out the line in acts_as_singleton.rb which privatizes a bunch of the instance methods, it works.
#private_class_method *methods.grep(PRIVATE) # Deny existent others.
musicsocial> VirtualPlaylist.instance
=> #<VirtualPlaylist name: nil, type: nil>
musicsocial> MyFavorites.instance
=> #<MyFavorites name: nil, type: "MyFavorites">
musicsocial> RecentlyPlayedSongs.instance
=> #<RecentlyPlayedSongs name: nil, type: "RecentlyPlayedSongs">
I'm not sure which method it is that is causing the problem.
Regards,
Karl
rails 3.1 is out
...and bundle update rails fails with:
bundle update rails
Fetching source index for http://rubygems.org/
Bundler could not find compatible versions for gem "activesupport":
In Gemfile:
railties (~> 3.1.0.rc1) depends on
activesupport (= 3.1.0.rc1)
acts_as_singleton (= 0.0.6.beta) depends on
activesupport (3.1.0.rc4)
Rails 3 Compatibility
ActiveRecord in Rails 3 needs to be able to call find_by_sql in order for acts_as_singleton to work. See this commit for a patch.
This gem doesn't play fine with rails 3.2
When invoking ::instance
ArgumentError: wrong number of arguments (2 for 1)
from /.rvm/gems/ruby-1.8.7-p357/gems/activerecord-3.2.1/lib/active_record/relation.rb:170:in find_by_sql' from /.rvm/gems/ruby-1.8.7-p357/gems/activerecord-3.2.1/lib/active_record/relation.rb:170:inexec_queries'
from /.rvm/gems/ruby-1.8.7-p357/gems/activerecord-3.2.1/lib/active_record/relation.rb:159:in to_a' from /.rvm/gems/ruby-1.8.7-p357/gems/activerecord-3.2.1/lib/active_record/explain.rb:40:inlogging_query_plan'
from /.rvm/gems/ruby-1.8.7-p357/gems/activerecord-3.2.1/lib/active_record/relation.rb:158:in to_a' from /.rvm/gems/ruby-1.8.7-p357/gems/activerecord-3.2.1/lib/active_record/relation/finder_methods.rb:377:infind_first'
from /.rvm/gems/ruby-1.8.7-p357/gems/activerecord-3.2.1/lib/active_record/relation/finder_methods.rb:122:in first' from /.rvm/gems/ruby-1.8.7-p357/gems/activerecord-3.2.1/lib/active_record/querying.rb:5:insend'
from /.rvm/gems/ruby-1.8.7-p357/gems/activerecord-3.2.1/lib/active_record/querying.rb:5:in first' from /.rvm/gems/ruby-1.8.7-p357/gems/acts_as_singleton-0.0.5/lib/acts_as_singleton.rb:43:ininstance'
rails 3 compatibility issues with find_by_sql again
Given this simple model
class Platform < ActiveRecord::Base
acts_as_singleton
end
and using 3.1.0.rc4 I get the following error when doing a
Platform.instance
in the rails console:
>> Platform.instance
ArgumentError: wrong number of arguments (2 for 1)
from /home/wtf/.rvm/gems/ruby-1.9.2-p180@satellite/bundler/gems/acts_as_singleton-4229bec5929a/lib/acts_as_singleton.rb:58:in `find_by_sql'
from /home/wtf/.rvm/gems/ruby-1.9.2-p180@satellite/gems/activerecord-3.1.0.rc4/lib/active_record/relation.rb:109:in `to_a'
from /home/wtf/.rvm/gems/ruby-1.9.2-p180@satellite/gems/activerecord-3.1.0.rc4/lib/active_record/relation/finder_methods.rb:370:in `find_first'
from /home/wtf/.rvm/gems/ruby-1.9.2-p180@satellite/gems/activerecord-3.1.0.rc4/lib/active_record/relation/finder_methods.rb:122:in `first'
from /home/wtf/.rvm/gems/ruby-1.9.2-p180@satellite/gems/activerecord-3.1.0.rc4/lib/active_record/base.rb:444:in `first'
from /home/wtf/.rvm/gems/ruby-1.9.2-p180@satellite/bundler/gems/acts_as_singleton-4229bec5929a/lib/acts_as_singleton.rb:43:in `instance'
from (irb):1
from /home/wtf/.rvm/gems/ruby-1.9.2-p180@satellite/gems/railties-3.1.0.rc4/lib/rails/commands/console.rb:45:in `start'
from /home/wtf/.rvm/gems/ruby-1.9.2-p180@satellite/gems/railties-3.1.0.rc4/lib/rails/commands/console.rb:8:in `start'
from /home/wtf/.rvm/gems/ruby-1.9.2-p180@satellite/gems/railties-3.1.0.rc4/lib/rails/commands.rb:40:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>
Even when using the most recent version via adding this line
gem 'acts_as_singleton', :git => 'https://github.com/stephencelis/acts_as_singleton.git'
to my Gemfile.
It seems to be the same issue as here: #3
Any ideas?
acts_as_single fails when polymorphic association uses validates_associated
Given
class God
acts_as_singleton
has_many :children, :as => :parent
end
class Child
belongs_to :parent, :polymorphic => true
validates_associated :parent
end
Child create seems to fail because the validation is calling 'find' on God which is now a private acts_as_singlton method.
Rails 4.1.10 & acts_as_singleton 0.0.8 - NoMethodError: private method `find_generated_attribute_method'
Rails 4.1.10 & acts_as_singleton 0.0.8
I'm getting the following error when calling an instance:
rails c test
Loading test environment (Rails 4.1.10)
irb: warn: can't alias context from irb_context.
2.1.5 :001 > GlobalSetting.instance
GlobalSetting Load (2.8ms) SELECT "global_settings".* FROM "global_settings" ORDER BY "global_settings"."id" ASC LIMIT 1
(1.1ms) BEGIN
(0.3ms) ROLLBACK
NoMethodError: private method `find_generated_attribute_method' called for #<Class:0x007fc79903bea8>
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