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课程推荐

This commit is contained in:
huang 2016-01-20 15:43:33 +08:00
parent 610b54b27c
commit 18c3c23d2c
4 changed files with 63 additions and 15 deletions
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37
app/helpers/courses_helper.rb
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@ -12,19 +12,38 @@ module CoursesHelper
#AllPeople = StudentRoles+TeacherRoles
## return people count
# 推荐的精品课程
def excellent_course_recommend course
q = "%#{course.name.strip}%"
result = find_excelletn_course(q, course)
def excellent_course_recommend new_course
q = "%#{new_course.name.strip}%"
result = find_excelletn_course(q, new_course)
end
# 查询符合条件的精品课程
def find_excelletn_course keywords, course
# 用新课程名去匹配精品课程中按课程名和Tag名
sql = "SELECT distinct c.* FROM `courses` c, tags t, taggings ts where t.id = ts.tag_id and ts.taggable_id = c.id and c.is_excellent = 1 and is_delete = 0 and
ts.taggable_type = 'Course' and (t.name like '%#{keywords}%'or c.name like '%#{keywords}%')"
resultSetTag = Course.find_by_sql(sql).select{|e_course| e_course.is_public ==1 unless User.current.member_of_course?(e_course)}.first(3)
resultSetTag
# 用新课程名去匹配精品课程中按课程名和Tag名
def find_excelletn_course keywords, current_course
# 获取tag匹配结果ID
a_tags = []
# kc = keywords.to_a
Course.visible.where("is_excellent =?", 2).each do |ec|
if ec.tags.any?{|value| current_course.name.include?(value.to_s)}
#if ec.tags.find_all{|ect| kc.include? ect}.length != 0
a_tags << ec.id
end
end
# sql = "SELECT distinct c.* FROM `courses` c, tags t, taggings ts where t.id = ts.tag_id and ts.taggable_id = c.id and c.is_excellent = 1 and is_delete = 0 and
# ts.taggable_type = 'Course' and t.name like '%#{keywords}%'"
# a_tags = Course.find_by_sql(sql).select{|course| course.is_public ==1 unless User.current.member_of_course?(course)}
# 通过elastic结果获取精品课程
a_courses = []
courses = Course.search(keywords)
courses.each do |c|
a_courses << c.id unless current_course.id != c.id
end
a_courses << a_tags unless a_tags.length == 0
# 过滤条件：精品课程、本身不在搜索范围
e_courses = Course.where("is_excellent =? and id in (?)",1,a_courses.uniq).where("id !=?",current_course.id)
e_courses
end
# 判断精品课程是否可见，非课程成员无法查看私有课程

30
app/models/course.rb
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@ -72,7 +72,7 @@ class Course < ActiveRecord::Base
before_save :self_validate
# 公开课程变成私有课程，所有资源都变成私有
after_update :update_files_public,:update_course_ealasticsearch_index,:update_activity
after_create :create_board_sync, :act_as_course_activity, :act_as_course_message,:create_course_ealasticsearch_index
after_create :create_board_sync, :act_as_course_activity, :act_as_course_message,:create_course_ealasticsearch_index, :add_course_ead
before_destroy :delete_all_members,:delete_course_ealasticsearch_index
safe_attributes 'extra',
@ -145,6 +145,26 @@ class Course < ActiveRecord::Base
)
end
def self.e_search(query)
__elasticsearch__.search(
{
query: {
multi_match: {
query: query,
type:"most_fields",
operator: "or",
fields: ['name', 'description^0.5']
}
},
sort: {
_score:{order: "desc" },
updated_at:{order:"desc"}
}
}
)
end
def visible?(user=User.current)
user.allowed_to?(:view_course, self)
end
@ -385,6 +405,14 @@ class Course < ActiveRecord::Base
self.course_messages << CourseMessage.new(:user_id => self.tea_id, :course_id => self.id, :viewed => false)
end
# 发布新课导语
def add_course_ead
name = Redmine::Configuration['course_message_lead_subject']
content = Redmine::Configuration['course_message_lead_content']
# message的status状态为0为正常，为1表示创建课程时发送的message
Message.create(:subject => name, :content => content, :board_id => self.boards.first.id, :author_id => self.tea_id , :sticky => true, :status => true )
end
#项目与课程分离后，很多课程的名称等信息为空，这些数据信息存储在项目表中！！就是数据兼容的问题
#def name
# read_attribute('name') || Project.find_by_identifier(self.extra).try(:name)

10
app/views/courses/_recommendation.html.erb
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@ -1,13 +1,13 @@
<% unless excellent_course_recommend(course).count == 0 %>
<ul class="courseR mb10">
<p class="fontGrey2 f14"><%= l(:label_homework_recommendation) %></p>
<% excellent_course_recommend(course).each do |c_course| %>
<li class="mt15"> <%= image_tag(url_to_avatar(c_course), :width => "40", :height => "40", :class => "fl mr10 rankPortrait", :alt => "logo") %>
<% excellent_course_recommend(course).each do |e_course| %>
<li class="mt15"> <%= image_tag(url_to_avatar(e_course), :width => "40", :height => "40", :class => "fl mr10 rankPortrait", :alt => "logo") %>
<div class="fl">
<p class="f12 mb5"><a href="javascript:void:(0);" class="hidden fl w170"><%=link_to c_course.name, course_path(c_course) %> </a></p>
<p class="f12 mb5"><%=link_to e_course.name, course_path(e_course.id), :class => "hidden fl w170" %></p>
<p class="f12">
<span class="fl mr15 fontGrey4"><%= l(:project_module_attachments) %>(<%= link_to c_course.attachments.count, course_files_path(c_course), :class => "linkBlue2" %>)</span>
<span class="fl fontGrey4"><%= l(:label_homework_commont) %>(<%= link_to c_course.homework_commons.count, homework_common_index_path(c_course), :class => "linkBlue2" %>)</span></p>
<span class="fl mr15 fontGrey4"><%= l(:project_module_attachments) %>(<%= link_to e_course.attachments.count, course_files_path(e_course), :class => "linkBlue2" %>)</span>
<span class="fl fontGrey4"><%= l(:label_homework_commont) %>(<%= link_to e_course.homework_commons.count, homework_common_index_path(e_course), :class => "linkBlue2" %>)</span></p>
</div>
<div class="cl"></div>
</li>

1
public/stylesheets/public.css
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@ -141,6 +141,7 @@ h4{ font-size:14px; color:#3b3b3b;}
.w100{width: 100px;}
.w210{ width:210px;}
.w150{ width:150px;}
.w170{width:170px;}
.w230{width:230px !important;}
.w235{ width:235px !important;}
.w280{ width:280px;}