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解决空数据库问题

This commit is contained in:
huang 2016-08-30 15:30:01 +08:00
parent ee2ae456ac
commit e2c0237fcd
1 changed files with 11 additions and 7 deletions
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18
db/migrate/20160511055221_merge_two_homeworks.rb
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@ -6,13 +6,17 @@ class MergeTwoHomeworks < ActiveRecord::Migration
work.update_column('homework_common_id', 3463)
end
end
homework = HomeworkCommon.find 3387
homework.destroy if homework
stu_works = StudentWork.where("homework_common_id = 3387")
stu_work_ids = stu_works.empty? ? "(-1)" : "(" + stu_works.map{|work| work.id}.join(',') + ")"
stu_work_tests = StudentWorkTest.where("student_work_id in #{stu_work_ids}")
stu_work_tests.destroy_all if stu_work_tests
stu_works.destroy_all if stu_works
begin
homework = HomeworkCommon.find 3387
homework.destroy if homework
stu_works = StudentWork.where("homework_common_id = 3387")
stu_work_ids = stu_works.empty? ? "(-1)" : "(" + stu_works.map{|work| work.id}.join(',') + ")"
stu_work_tests = StudentWorkTest.where("student_work_id in #{stu_work_ids}")
stu_work_tests.destroy_all if stu_work_tests
stu_works.destroy_all if stu_works
rescue Exception => e
puts e
end
end
def down