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课堂学生数为0时统计页面报错

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cxt 5 years ago
parent acdefd2930
commit 167bacabe9
1 changed files with 1 additions and 1 deletions
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app/controllers/courses_controller.rb
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@ -1539,7 +1539,7 @@ class CoursesController < ApplicationController
end end
def course_statistics course, max_exp, limit def course_statistics course, max_exp, limit
max_rate = 20.0 / max_exp max_rate = max_exp.nil? ? 0 : 20.0 / max_exp
sql_select = %Q{ SELECT a.*, (message_num*0.2 + message_reply_num*0.1 + resource_num*0.5 + homework_journal_num*0.1 + graduation_num + sql_select = %Q{ SELECT a.*, (message_num*0.2 + message_reply_num*0.1 + resource_num*0.5 + homework_journal_num*0.1 + graduation_num +
homework_num + exercise_num + poll_num*0.7 + exercise_score * 0.7 + graduation_score * 0.7 + homework_score * 0.7 + exp*#{max_rate}) homework_num + exercise_num + poll_num*0.7 + exercise_score * 0.7 + graduation_score * 0.7 + homework_score * 0.7 + exp*#{max_rate})

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