合并两个相同的作业
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@ -0,0 +1,20 @@
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class MergeTwoHomeworks < ActiveRecord::Migration
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def up
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student_works = StudentWork.where("homework_common_id = 3387 and user_id in (11256, 11259, 11252, 11499)")
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unless student_works.nil?
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student_works.each do |work|
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work.update_column('homework_common_id', 3463)
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end
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end
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homework = HomeworkCommon.find 3387
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homework.destroy if homework
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stu_works = StudentWork.where("homework_common_id = 3387")
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stu_work_ids = stu_works.empty? ? "(-1)" : "(" + stu_works.map{|work| work.id}.join(',') + ")"
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stu_work_tests = StudentWorkTest.where("student_work_id in #{stu_work_ids}")
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stu_work_tests.destroy_all if stu_work_tests
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stu_works.destroy_all if stu_works
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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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19
db/schema.rb
19
db/schema.rb
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@ -11,7 +11,7 @@
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#
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#
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# It's strongly recommended to check this file into your version control system.
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# It's strongly recommended to check this file into your version control system.
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ActiveRecord::Schema.define(:version => 20160509025404) do
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ActiveRecord::Schema.define(:version => 20160511055221) do
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create_table "activities", :force => true do |t|
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create_table "activities", :force => true do |t|
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t.integer "act_id", :null => false
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t.integer "act_id", :null => false
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@ -1107,23 +1107,6 @@ ActiveRecord::Schema.define(:version => 20160509025404) do
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t.integer "viewed_count", :default => 0
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t.integer "viewed_count", :default => 0
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end
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end
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create_table "mess", :id => false, :force => true do |t|
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t.string "课程名"
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t.integer "课程ID", :default => 0, :null => false
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t.string "教师姓", :default => "", :null => false
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t.string "教师名", :limit => 30, :default => "", :null => false
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t.string "主贴名", :default => "", :null => false
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t.integer "主贴或回帖ID", :default => 0, :null => false
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t.integer "回帖对应主贴ID"
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t.integer "帖子点赞数"
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t.integer "主贴回复数", :default => 0, :null => false
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t.text "主贴或回帖内容"
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t.datetime "发帖时间", :null => false
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t.integer "发帖或回帖用户ID", :default => 0, :null => false
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t.string "发帖或回帖用户姓", :default => "", :null => false
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t.string "发帖或回帖用户名", :limit => 30, :default => "", :null => false
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end
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create_table "message_alls", :force => true do |t|
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create_table "message_alls", :force => true do |t|
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t.integer "user_id"
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t.integer "user_id"
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t.integer "message_id"
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t.integer "message_id"
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