14 lines
356 B
Ruby
14 lines
356 B
Ruby
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class MigrateCourseStudents < ActiveRecord::Migration
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def change
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# 原课程的学生数据迁移成新模式
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StudentsForCourse.all.each do |student|
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project = Project.find_by_id(student.course_id)
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if project
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student.course_id = project.course_extra.id
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student.save
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end
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end
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end
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end
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