Module: Reform::Form::Sync::SkipUnchanged

Defined in:
lib/reform/form/sync.rb

Overview

This will skip unchanged properties in #sync. To use this for all nested form do as follows.

class SongForm < Reform::Form
  feature Synd::SkipUnchanged

Instance Method Summary collapse

Instance Method Details

#sync_hash(options) ⇒ Object 



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# File 'lib/reform/form/sync.rb', line 105

def sync_hash(options)
  # DISCUSS: we currently don't track if nested forms have changed (only their attributes). that's why i include them all here, which
  # is additional sync work/slightly wrong. solution: allow forms to form.changed? not sure how to do that with collections.
  scalars   = mapper.fields { |dfn| !dfn[:form] }
  unchanged = scalars - changed.keys

  # exclude unchanged scalars, nested forms and changed scalars still go in here!
  options.exclude!(unchanged.map(&:to_sym))
  super
end