Returns the original value of an attribute before the last save. Behaves similarly to attribute_was
. This method is useful in after callbacks to get the original value of an attribute before the save that just occurred
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 164 def attribute_before_last_save(attr_name) mutations_before_last_save.original_value(attr_name) end
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 218 def attribute_change(*) emit_warning_if_needed("attribute_change", "saved_change_to_attribute") super end
Alias for `attribute_change`
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 184 def attribute_change_to_be_saved(attr_name) mutations_from_database.change_to_attribute(attr_name) end
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 223 def attribute_changed?(*) emit_warning_if_needed("attribute_changed?", "saved_change_to_attribute?") super end
Alias for `attribute_was`
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 189 def attribute_in_database(attr_name) mutations_from_database.original_value(attr_name) end
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 213 def attribute_was(*) emit_warning_if_needed("attribute_was", "attribute_before_last_save") super end
Alias for `changed_attributes`
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 209 def attributes_in_database changes_to_save.transform_values(&:first) end
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 233 def changed(*) emit_warning_if_needed("changed", "saved_changes.keys") super end
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 228 def changed?(*) emit_warning_if_needed("changed?", "saved_changes?") super end
Alias for `changed`
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 204 def changed_attribute_names_to_save changes_to_save.keys end
Alias for `changes`
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 199 def changes_to_save mutations_from_database.changes end
Alias for `changed?`
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 194 def has_changes_to_save? mutations_from_database.any_changes? end
reload
the record and clears changed attributes.
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 48 def reload(*) super.tap do @previous_mutation_tracker = nil clear_mutation_trackers @changed_attributes = ActiveSupport::HashWithIndifferentAccess.new end end
Attempts to save
the record and clears changed attributes if successful.
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 33 def save(*) if status = super changes_applied end status end
Attempts to save!
the record and clears changed attributes if successful.
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 41 def save!(*) super.tap do changes_applied end end
Returns the change to an attribute during the last save. If the attribute was changed, the result will be an array containing the original value and the saved value.
Behaves similarly to attribute_change
. This method is useful in after callbacks, to see the change in an attribute that just occurred
This method can be invoked as `saved_change_to_name` in instead of `saved_change_to_attribute(“name”)`
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 156 def saved_change_to_attribute(attr_name) mutations_before_last_save.change_to_attribute(attr_name) end
Did this attribute change when we last saved? This method can be invoked as `saved_change_to_name?` instead of `saved_change_to_attribute?(“name”)`. Behaves similarly to attribute_changed?
. This method is useful in after callbacks to determine if the call to save changed a certain attribute.
from
When passed, this method will return false unless the original value is equal to the given option
to
When passed, this method will return false unless the value was changed to the given value
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 143 def saved_change_to_attribute?(attr_name, **options) mutations_before_last_save.changed?(attr_name, **options) end
Returns a hash containing all the changes that were just saved.
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 174 def saved_changes mutations_before_last_save.changes end
Did the last call to `save` have any changes to change?
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 169 def saved_changes? mutations_before_last_save.any_changes? end
Alias for `attribute_changed?`
# File activerecord/lib/active_record/attribute_methods/dirty.rb, line 179 def will_save_change_to_attribute?(attr_name, **options) mutations_from_database.changed?(attr_name, **options) end
© 2004–2017 David Heinemeier Hansson
Licensed under the MIT License.