J'ai deux méthodes dans mon modèle d'application rails.La méthode correcte pour implémenter des objets Query pour des requêtes AR similaires
def questions_mastered_for(user_id, question_group_ids)
res = UserAnswer
.joins('INNER JOIN question_group_questions ON user_answers.question_id = question_group_questions.question_id')
.joins('INNER JOIN marks ON user_answers.id = marks.user_answer_id')
.group('question_group_questions.question_group_id')
.where(question_group_questions: { question_group_id: question_group_ids })
.where(user_answers: { user_id: user_id })
.where("(marks.boolean_mark_correct = true AND marks.mark_type = 'boolean') OR (marks.fraction_numerator = marks.fraction_denominator AND marks.mark_type = 'fraction')")
.pluck('question_group_questions.question_group_id', 'COUNT(DISTINCT(user_answers.question_id))')
question_group_mastery = {}
question_group_ids.each { |question_group_id| question_group_mastery[question_group_id] = 0 }
res.each { |data| question_group_mastery[data.first] = data.second }
question_group_mastery
end
def questions_attempted_for(user_id, question_group_ids)
res = UserAnswer
.joins('INNER JOIN question_group_questions ON user_answers.question_id = question_group_questions.question_id')
.group('question_group_questions.question_group_id')
.where(question_group_questions: { question_group_id: question_group_ids })
.where(user_answers: { user_id: user_id })
.pluck('question_group_questions.question_group_id', 'COUNT(DISTINCT(user_answers.question_id))')
question_group_attempted = {}
question_group_ids.each { |question_group_id| question_group_attempted[question_group_id] = 0 }
res.each { |data| question_group_attempted[data.first] = data.second }
question_group_attempted
end
Si nous pouvons voir des méthodes ci-dessus, les deux ne interrogent presque similaire, la seule différence est dans questions_mastered_for
il y a jointure supplémentaire et où la condition à la table marks
.
J'ai lu quelques articles que ce cas d'utilisation particulier peut généralement être résolu en utilisant l'objet de requête, mais je me demande comment l'implémenter correctement?
Toutes les suggestions que j'apprécie aimablement.