Contents

# the events method is a developer's tool for visualizing the event order for a given card.
# For example, from a console you might run
#
#   puts mycard.events :update
#
# to see the order of events that will be executed on mycard.
# The indention and arrows (^v) indicate event dependencies.
#
# Note: as of yet, the functionality is a bit rough.  It does not display events
# that are called directly from within other events (like :stored), and certain event
# requirements (like the presence of a "current_act") may prevent events from showing
# up in the tree.
def events action
  @action = action
  events = [ events_tree(:validation), events_tree(:save) ]
  @action = nil
  puts_events events
end

#private

def puts_events events, prefix='', depth=0
  r = ''
  depth += 1
  events.each do |e|
    space = ' ' * (depth * 2)

    #FIXME - this is not right.  before and around callbacks are processed in declaration order regardless of kind.
    # not all befores then all arounds

    if e[:before]
      r += puts_events( e[:before], space+'v  ', depth)
    end
    if e[:around]
      r += puts_events( e[:around], space+'vv ', depth )
    end


    output = "#{prefix}#{e[:name]}"
    #warn output
    r+= "#{output}\n"

    if e[:after]
      r += puts_events( e[:after ].reverse, space+'^  ', depth )
    end
  end
  r
end

def events_tree filt
  hash = {:name => filt }
  if respond_to? "_#{filt}_callbacks"
    send( "_#{filt}_callbacks" ).each do |callback|
      next unless callback.applies? self
      hash[callback.kind] ||= []
      hash[callback.kind] << events_tree( callback.filter )
    end
  end

  hash
end


class ::ActiveSupport::Callbacks::Callback
  def applies? object
    conditions_lambdas.all? { |c| c.call(object, nil) }
  end
end

Version data entries

5 entries across 5 versions & 1 rubygems

Version	Path
card-1.16.6	mod/05_standard/set/all/event_viz.rb
card-1.16.5	mod/05_standard/set/all/event_viz.rb
card-1.16.4	mod/05_standard/set/all/event_viz.rb
card-1.16.3	mod/05_standard/set/all/event_viz.rb
card-1.16.2	mod/05_standard/set/all/event_viz.rb