Using Observable from standard library

Artur_Beljajev · January 3, 2019, 2:34pm

Did anybody have any success using Observable module from stdlib with Rails? (version doesn’t matter).

The problem I encountered is that changed method from ActiveModel::Dirty conflicts with changed from Observable.

Artur_Beljajev · January 3, 2019, 2:35pm

github.com

rails/rails/blob/5bc90022eb024bd6979497e12091d4a16e8288ff/activemodel/lib/active_model/dirty.rb#L137


      
          #   person.changed? # => true
          def changed?
            changed_attributes.present?
          end
          
          
# Returns an array with the name of the attributes with unsaved changes.
          #
          #   person.changed # => []
          #   person.name = 'bob'
          #   person.changed # => ["name"]
          def changed
            changed_attributes.keys
          end
          
          
# Returns a hash of changed attributes indicating their original
          # and new values like <tt>attr => [original value, new value]</tt>.
          #
          #   person.changes # => {}
          #   person.name = 'bob'
          #   person.changes # => { "name" => ["bill", "bob"] }
          def changes

Artur_Beljajev · January 3, 2019, 2:54pm

I wonder if there is any reasonable alternative rather than re-implementing Observable.

Topic		Replies	Views
How can I make a property aware of changes on another? rubyonrails-talk	0	123	August 30, 2006
Lohan the observable rubyonrails-talk	1	81	July 26, 2007
How to check if an attribute has changed? rubyonrails-talk	1	124	June 14, 2010
`changes` method in ActiveModel::Dirty is not working rubyonrails-core	1	208	April 8, 2010
Use callbacks to determine model field changes? rubyonrails-talk	3	213	May 28, 2009

Using Observable from standard library

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