canvas-lms/db/migrate/20110307163027_add_ungraded...

26 lines
816 B
Ruby

class AddUngradedCountToAssignments < ActiveRecord::Migration
def self.up
add_column :assignments, :needs_grading_count, :integer, :default => 0
execute <<-SQL
UPDATE assignments SET needs_grading_count = COALESCE((
SELECT COUNT(*)
FROM submissions s
INNER JOIN enrollments e ON e.user_id = s.user_id AND e.workflow_state = 'active'
WHERE s.assignment_id = assignments.id
AND e.course_id = assignments.context_id
AND (s.score IS NULL
OR NOT grade_matches_current_submission
OR s.workflow_state = 'submitted'
OR s.workflow_state = 'pending_review'
)
AND s.submission_type IS NOT NULL
), 0)
SQL
end
def self.down
remove_column :assignments, :needs_grading_count
end
end