Module: VersionFu::InstanceMethods

Defined in:
lib/version_fu.rb

Instance Method Summary collapse

Instance Method Details

#as_of_version(version) ⇒ Object 



117
118
119
120
121
122
123
124
125
 
# File 'lib/version_fu.rb', line 117

def as_of_version(version)
  v = find_version(version)
  obj = self.class.new
  (versioned_columns + [:version, :updated_at]).each do |a|
    obj.send("#{a}=", v.send(a))
  end
  obj.id = id
  obj.freeze      
end

#check_for_new_version ⇒ Object 



84
85
86
87
 
# File 'lib/version_fu.rb', line 84

def check_for_new_version
  instatiate_revision if create_new_version?
  true # Never halt save
end

#create_new_version? ⇒ Boolean

This the method to override if you want to have more control over when to version



90
91
92
93
 
# File 'lib/version_fu.rb', line 90

def create_new_version?
  # Any versioned column changed?
  self.class.versioned_columns.detect {|a| __send__ "#{a}_changed?"}
end

#find_version(number) ⇒ Object 



80
81
82
 
# File 'lib/version_fu.rb', line 80

def find_version(number)
  versions.find :first, :conditions=>{:version=>number}
end

#instatiate_revision ⇒ Object 



95
96
97
98
99
100
101
102
103
 
# File 'lib/version_fu.rb', line 95

def instatiate_revision
  new_version = versions.build
  versioned_columns.each do |attribute|
    new_version.__send__ "#{attribute}=", __send__(attribute)
  end
  version_number = new_record? ? 1 : version + 1
  new_version.version = version_number
  self.version = version_number
end

#revert ⇒ Object 



105
106
107
 
# File 'lib/version_fu.rb', line 105

def revert
  revert_to(version-1) unless version == 1
end

#revert_to(version) ⇒ Object 



109
110
111
112
113
114
115
 
# File 'lib/version_fu.rb', line 109

def revert_to(version)
  revert_to_version = find_version(version)
  versioned_columns.each do |a|
    send("#{a}=", revert_to_version.send(a))
  end  
  save
end