```ruby
class IntegrityCheck

  def check!
    begin
      has_data?
      has_valid_data?
      puts 'All good!'
    rescue => error
      puts 'Uh oh! Data check failed:'
      puts error.message
    end
  end

  private

  def has_data?
    raise "no students" unless Student.count > 0
    raise "no schools" unless School.count > 0
    raise "no assesments" unless Assessment.count > 0
    raise "no homerooms" unless Homeroom.count > 0
    raise "no student assessments" unless StudentAssessment.count > 0
    raise "no educators" unless Educator.count > 0
  end

  def has_valid_data?
    StudentAssessment.find_each(&:save!)
    Educator.find_each(&:save!)
    Student.find_each(&:save!)
  end

end
```

Add StudentSchoolYears to data integrity check
user
```ruby
class IntegrityCheck

  def check!
    begin
      has_data?
      has_valid_data?
      puts 'All good!'
    rescue => error
      puts 'Uh oh! Data check failed:'
      puts error.message
    end
  end

  private

  def has_data?
    raise "no students" unless Student.count > 0
    raise "no schools" unless School.count > 0
    raise "no assesments" unless Assessment.count > 0
    raise "no homerooms" unless Homeroom.count > 0
    raise "no student assessments" unless StudentAssessment.count > 0
    raise "no educators" unless Educator.count > 0
  end

  def has_valid_data?
    StudentAssessment.find_each(&:save!)
    Educator.find_each(&:save!)
    Student.find_each(&:save!)
    StudentSchoolYear.find_each(&:save!)
  end

end
```
assistant