fromJson static method

Implementation

// ignore: prefer_constructors_over_static_methods
static MathQuestionWithAnswer? fromJson(dynamic value) {
  if (value is Map) {
    final json = value.cast<String, dynamic>();

    // Ensure that the map contains the required keys.
    // Note 1: the values aren't checked for validity beyond being non-null.
    // Note 2: this code is stripped in release mode!
    assert(() {
      requiredKeys.forEach((key) {
        assert(json.containsKey(key), 'Required key "MathQuestionWithAnswer[$key]" is missing from JSON.');
        assert(json[key] != null, 'Required key "MathQuestionWithAnswer[$key]" has a null value in JSON.');
      });
      return true;
    }());

    return MathQuestionWithAnswer(
      id: mapValueOfType<int>(json, r'id')!,
      topic: Topic.fromJson(json[r'topic'])!,
      subTopic: SubTopic.fromJson(json[r'sub_topic'])!,
      skillsAssessed: Skill.listFromJson(json[r'skills_assessed']),
      content: mapValueOfType<String>(json, r'content')!,
      createdAt: mapDateTime(json, r'created_at', r'')!,
      updatedAt: mapDateTime(json, r'updated_at', r'')!,
      difficulty: mapValueOfType<int>(json, r'difficulty'),
      cognitiveSkills: MathQuestionCognitiveSkills.fromJson(json[r'cognitive_skills']),
      grade: mapValueOfType<int>(json, r'grade'),
      expectedTimeToSolve: mapValueOfType<String>(json, r'expected_time_to_solve'),
      relatedConcepts: mapValueOfType<String>(json, r'related_concepts'),
      hintsProvided: mapValueOfType<String>(json, r'hints_provided'),
      learningOutcomes: mapValueOfType<String>(json, r'learning_outcomes'),
      prerequisites: mapValueOfType<String>(json, r'prerequisites'),
      recommendedGradeLevel: mapValueOfType<String>(json, r'recommended_grade_level'),
      expectedAnswer: mapValueOfType<String>(json, r'expected_answer'),
      image: mapValueOfType<String>(json, r'image'),
      answerImage: mapValueOfType<String>(json, r'answer_image'),
      platform: mapValueOfType<int>(json, r'platform'),
    );
  }
  return null;
}