29 lines
1.3 KiB
Ruby
29 lines
1.3 KiB
Ruby
class CoursesService
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include ApplicationHelper
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#参数school_id为0或不传时返回所有课程，否则返回对应学校的课程
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#参数per_page_count分页功能，每页显示的课程数
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#参数page分页功能，当前页码
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def course_list params
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@school_id = params[:school_id]
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per_page_option = params[:per_page_count] || 10
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page_no = params[:page] || 1
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if @school_id == "0" || @school_id.nil?
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@courses_all = Course.active.visible.
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joins("LEFT JOIN #{CourseStatus.table_name} ON #{Course.table_name}.id = #{CourseStatus.table_name}.course_id")
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else
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@courses_all = Course.active.visible.
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joins("LEFT JOIN #{CourseStatus.table_name} ON #{Course.table_name}.id = #{CourseStatus.table_name}.course_id").
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where("#{Course.table_name}.school_id = ?", @school_id)
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end
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@course_count = @courses_all.count
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@course_pages = Redmine::Pagination::Paginator.new @course_count, per_page_option,page_no
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@courses = @courses_all.order("created_at desc")
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@courses = @courses.offset(@course_pages.offset).limit(@course_pages.per_page)
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course_list = []
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@courses.each do |course|
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course_list << {:course => course,:img_url => url_to_avatar(course)}
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end
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course_list
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end
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end |