Method: ContentData.remove_instances

Defined in:
lib/content_data/content_data.rb

.remove_instances(a, b) ⇒ Object

B - A : Remove instances of A content from B content data B and return the new content data. If all instances are removed then the content record itself will be removed e.g A db:

Content_1 ->
               Instance_1
               Instance_2

Content_2 ->
               Instance_3

B db:

Content_1 ->
               Instance_1
               Instance_2

Content_2 ->
               Instance_3
               Instance_4

B-A db:

Content_2 ->
                Instance_4



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# File 'lib/content_data/content_data.rb', line 796

def self.remove_instances(a, b)
  return nil if b.nil?
  return ContentData.new(b) if a.nil?
  c = ContentData.new(b)  # create new cloned content C from B
  # remove contents of A from newly cloned content A
  a.each_instance { |_, _, _, _, server, path|
    c.remove_instance(server, path)
  }
  c
end