迁移

db/migrate/20190507061901_migrate_exercise_quetsion_quetsion_score.rb

@@ -0,0 +1,8 @@
+class MigrateExerciseQuetsionQuetsionScore < ActiveRecord::Migration
+  def up
+    change_column :exercise_questions, :question_score, :float, :default => 0
+  end
+
+  def down
+  end
+end