Just got some failing specs from our 1.8.6 test runner, when using OrderedHash#first, so we fix that…
# add {}.first if its not there (1.8.6)
unless {}.respond_to?(:first)
class Hash
def first
return if keys.empty?
[keys.first, self[keys.first]]
end
end
end
user.persons.build(:type=>’Manager’).class != Manager, which makes a lot of problems with single table inheritance, especially when dealing with accepts_nested_attributes_for / fields_for that rely on correct class of the associated.
# Make build associations have their given type
# Makes that: user.persons.build(:type=>Manager).class == Manger
class ActiveRecord::Reflection::AssociationReflection
def build_association(*options)
if options.first.is_a?(Hash) and options.first[:type].presence
options.first[:type].to_s.constantize.new(*options)
else
klass.new(*options)
end
end
end
Just build this little guy for our puppet script, maybe someone needs it too 🙂
export V=0.7.67 && wget -O /tmp/nginx-$V.tar.gz http://sysoev.ru/nginx/nginx-$V.tar.gz && cd /tmp && tar xzvf nginx-$V.tar.gz && sudo passenger-install-nginx-module --nginx-source-dir /tmp/nginx-$V --extra-configure-flags="--with-http_ssl_module" --auto --prefix=/opt/nginx-$V && rm /opt/nginx && sudo ln -s /opt/nginx-$V /opt/nginx
(If you like the stock nginx without ssl, youll need the –auto-download option)
A simple and readable alternative to update_all({:x=>y}, :id=>id)
Usage
User.update_one(id, :name=>'Pete')
Code
clas ActiveRecord::Base
def self.update_one(id, attributes)
update_all(attributes, :id => id)
end
end
A small hack to get minimum/maximum functionality on MongoMapper, its not 100% secure(can be wrong when inserting twice at the same time etc), but good enought for our usecase 😉
Usage
User.maximum(:friend_count) User.minimum(:friend_count)
Code
module MongoMapper::Document::ClassMethods
def maximum(column)
first(:order => "#{column} desc").try(column)
end
def minimum(column)
first(:order => "#{column} asc").try(column)
end
end
Michael Grosser, the Blog 