Class: PaperTrailDiff::ActivityEventRecordResolver

Inherits:
Object
  • Object
show all
Defined in:
lib/paper_trail_diff/activity_event_record_resolver.rb,
sig/generated/paper_trail_diff/activity_event_record_resolver.rbs

Overview

Reconstructs an event's post-change record or immutable scalar delta.

Constant Summary collapse

RECORD_AFTER_HANDLERS =

Returns:

  • (Object) 
{
  'create' => :created_record_after,
  'update' => :updated_record_after
}.freeze

Instance Method Summary collapse

Constructor Details

#initialize(record_transition: nil) ⇒ ActivityEventRecordResolver

: (?record_transition: untyped) -> void

Parameters:

  • record_transition: (Object) (defaults to: nil) 


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# File 'lib/paper_trail_diff/activity_event_record_resolver.rb', line 14

def initialize(record_transition: nil)
  @record_transition = record_transition
end

Instance Method Details

#after_attributes(changes, model_class) ⇒ Hash[untyped, untyped]

: (untyped, untyped) -> Hash[untyped, untyped]

Parameters:

  • (Object)
  • (Object)

Returns:

  • (Hash[untyped, untyped]) 


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# File 'lib/paper_trail_diff/activity_event_record_resolver.rb', line 87

def after_attributes(changes, model_class)
  names = model_class.attribute_names
  attributes = {} #: Hash[untyped, untyped]
  changes.each do |name, values|
    next unless names.include?(name.to_s)

    attributes[name] = values.last
  end
  attributes
end

#apply_changes(record, changes) ⇒ Object

: (untyped, untyped) -> untyped

Parameters:

  • (Object)
  • (Object)

Returns:

  • (Object) 


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# File 'lib/paper_trail_diff/activity_event_record_resolver.rb', line 99

def apply_changes(record, changes)
  return unless record && changes.respond_to?(:each) && !changes.empty?

  changes.each do |name, values|
    next unless record.has_attribute?(name) && values.respond_to?(:last)

    record[name] = values.last
  end
  record
end

#changed_record_after(version) ⇒ Object

: (untyped) -> untyped

Parameters:

  • (Object)

Returns:

  • (Object) 


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# File 'lib/paper_trail_diff/activity_event_record_resolver.rb', line 48

def changed_record_after(version)
  handler = RECORD_AFTER_HANDLERS[version.event.to_s]
  send(handler, version) if handler
end

#created_record_after(version) ⇒ Object

: (untyped) -> untyped

Parameters:

  • (Object)

Returns:

  • (Object) 


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# File 'lib/paper_trail_diff/activity_event_record_resolver.rb', line 54

def created_record_after(version)
  model_class = Endpoint.model_class(version)
  changes = deserialized_changeset(version, model_class)
  return unless changes.respond_to?(:each) && !changes.empty?

  model_class.new(after_attributes(changes, model_class))
end

#deserialized_changeset(version, model_class) ⇒ Object

Mirrors PaperTrail's changeset deserialization without resolving version.item, which would issue one live-record query per event. : (untyped, untyped) -> untyped

Parameters:

  • (Object)
  • (Object)

Returns:

  • (Object) 


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# File 'lib/paper_trail_diff/activity_event_record_resolver.rb', line 72

def deserialized_changeset(version, model_class)
  return unless model_class && version.class.column_names.include?('object_changes')

  paper_trail = Object.const_get(:PaperTrail) #: untyped
  adapter = paper_trail.config.object_changes_adapter
  return adapter.load_changeset(version) if adapter.respond_to?(:load_changeset)

  standard_changeset(paper_trail, version, model_class)
end

#record_after(version) ⇒ Object

: (untyped) -> untyped

Parameters:

  • (Object)

Returns:

  • (Object) 


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# File 'lib/paper_trail_diff/activity_event_record_resolver.rb', line 19

def record_after(version)
  return if version.event.to_s == 'destroy'

  changed_record = changed_record_after(version)
  return changed_record if changed_record

  successor = version.next
  record = successor&.reify(dup: true)
  return record if record

  model_class = Endpoint.model_class(version)
  criteria = { model_class.primary_key => version.item_id } #: Hash[untyped, untyped]
  model_class.unscoped.find_by(criteria)
end

#snapshot_delta(version) ⇒ ActivitySnapshotDelta?

: (untyped) -> ActivitySnapshotDelta?

Parameters:

  • (Object)

Returns:



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# File 'lib/paper_trail_diff/activity_event_record_resolver.rb', line 35

def snapshot_delta(version)
  return unless version.event.to_s == 'update' && version.object

  transition = @record_transition&.call(version)
  return unless transition

  ActivitySnapshotDelta.new(
    before_attributes: transition.fetch(0),
    after_attributes: transition.fetch(1)
  )
end

#standard_changeset(paper_trail, version, model_class) ⇒ Object

: (untyped, untyped, untyped) -> untyped

Parameters:

  • (Object)
  • (Object)
  • (Object)

Returns:

  • (Object) 


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# File 'lib/paper_trail_diff/activity_event_record_resolver.rb', line 111

def standard_changeset(paper_trail, version, model_class)
  raw_changes = version.send(:object_changes_deserialized)
  active_support = Object.const_get(:ActiveSupport) #: untyped
  changes = active_support.const_get(:HashWithIndifferentAccess).new(raw_changes)
  serializers = paper_trail.const_get(:AttributeSerializers)
  serializers.const_get(:ObjectChangesAttribute).new(model_class).deserialize(changes)
  changes
end

#updated_record_after(version) ⇒ Object

: (untyped) -> untyped

Parameters:

  • (Object)

Returns:

  • (Object) 


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# File 'lib/paper_trail_diff/activity_event_record_resolver.rb', line 63

def updated_record_after(version)
  record = version.reify(dup: true)
  changes = deserialized_changeset(version, record&.class)
  apply_changes(record, changes)
end