canvas-lms/app/models/learning_outcome_question_r...

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#
# Copyright (C) 2015 Instructure, Inc.
#
# This file is part of Canvas.
#
# Canvas is free software: you can redistribute it and/or modify it under
# the terms of the GNU Affero General Public License as published by the Free
# Software Foundation, version 3 of the License.
#
# Canvas is distributed in the hope that it will be useful, but WITHOUT ANY
# WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR
# A PARTICULAR PURPOSE. See the GNU Affero General Public License for more
# details.
#
# You should have received a copy of the GNU Affero General Public License along
# with this program. If not, see <http://www.gnu.org/licenses/>.
#
class LearningOutcomeQuestionResult < ActiveRecord::Base
include PolymorphicTypeOverride
override_polymorphic_types associated_asset_type: {'Quiz' => 'Quizzes::Quiz'}
belongs_to :learning_outcome_result
belongs_to :learning_outcome
belongs_to :associated_asset, :polymorphic => true
simply_versioned
scope :for_associated_asset, lambda {|associated_asset|
where(:associated_asset_type => associated_asset.class.to_s, :associated_asset_id => associated_asset.id)
}
before_save :infer_defaults
def infer_defaults
self.original_score ||= self.score
self.original_possible ||= self.possible
self.original_mastery = self.mastery if self.original_mastery.nil?
calculate_percent!
true
end
def calculate_percent!
if self.score && self.possible
self.percent = self.score.to_f / self.possible.to_f
end
self.percent = nil if self.percent && !self.percent.to_f.finite?
end
def save_to_version(attempt)
if self.versions.empty?
save
else
current_version = self.versions.current.model
if current_version.attempt && attempt < current_version.attempt
versions = self.versions.sort_by(&:created_at).reverse.select{|v| v.model.attempt == attempt}
unless versions.empty?
versions.all? do |version|
update_version_data(version)
end
end
else
save
end
end
end
private
def update_version_data(version)
version_data = YAML::load(version.yaml)
version_data["score"] = self.score
version_data["mastery"] = self.mastery
version_data["possible"] = self.possible
version_data["attempt"] = self.attempt
version_data["title"] = self.title
version.yaml = version_data.to_yaml
version.save
end
end