18 lines
359 B
Ruby
18 lines
359 B
Ruby
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class DeleteNullCourseActivity < ActiveRecord::Migration
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def up
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count = CourseActivity.all.count / 30 + 2
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transaction do
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for i in 1 ... count do i
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CourseActivity.page(i).per(30).each do |activity|
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unless activity.course_act
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activity.destroy
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end
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end
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end
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end
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end
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def down
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end
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end
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