Jam_Func
Not ready.
Use It (when it's ready)
gem install "Jam_Func" require "Jam_Func"
j = Jam_Func.new
j.on "create User", lambda { |o|
User.create o[:name], o[:fav_book]
}
j.on "before create User", lambda { |o, last, jam|
if name_is_taken o[:name]
jam.error("name taken", o[:name])
end
}
j.run('create User')Alternatives
Lots. But, I could not find some this simple and down to the point. Let me know in the issues if you find something better than this.
Better == Just_As_Simple_But_Better_Maintained