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json.exercises_counts do
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json.exercises_total_counts @exercises_count #全部试卷数
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json.exercises_all_counts @exercises_select_count #选择后的全部试卷数
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json.exercises_unpublish_counts @exercises_unpublish_counts #未发布试卷数
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json.exercises_published_counts @exercises_published_counts #已发布试卷数
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json.exercises_ended_counts @exercises_ended_counts #已截止试卷数
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json.left_banner_id @left_banner_id
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json.left_banner_name @left_banner_name
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end
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json.course_types do
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json.course_status @course.is_end ? 1 : 0 #课堂的当前是否结束，如结束，则为1，否则为0
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json.course_end_time @course.end_date #课堂的截止时间
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json.course_is_public @course.is_public #判断课堂是否为公开，只有公开课才有设为公开的按钮
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json.user_permission @is_teacher_or # 当前用户存在且为课堂教师/管理员/超级管理员时为1 ，课堂成员为2，否则为0
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end
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if @exercises_count > 0
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json.exercises do
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json.array! @exercises do |exercise|
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ex_index = exercise_index_show(exercise,@course,@is_teacher_or,@current_user_)
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json.extract! exercise, :id, :exercise_name,:is_public,:created_at,:time
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json.exercise_status ex_index[:ex_status]
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json.lock_status ex_index[:lock_icon]
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json.publish_time ex_index[:publish_time] # 试卷的发布时间
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json.end_time ex_index[:end_time] # 试卷的截止时间
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json.exercise_answer ex_index[:exercise_answer] # 已提交试卷的用户
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json.exercise_unanswer ex_index[:exercise_unanswer] # 已查看试卷/开始答题，但是未提交试卷的用户
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json.exercise_left_time ex_index[:ex_left_time]
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json.current_status ex_index[:current_status] #答题的状态
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json.unreview_count ex_index[:unreview_count]
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json.exercise_tips ex_index[:ex_tips]
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end
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end
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else
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json.exercises []
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end
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