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33 lines
981 B
33 lines
981 B
6 years ago
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class CourseGroup < ApplicationRecord
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default_scope { order("course_groups.position ASC") }
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belongs_to :course, counter_cache: true
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has_many :course_members
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has_many :exercise_group_settings,:dependent => :destroy
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has_many :attachment_group_settings, :dependent => :destroy
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has_many :homework_group_reviews, :dependent => :destroy
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scope :by_group_ids, lambda { |ids| where(id: ids)}
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validates :name, length: { maximum: 20 }
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after_create :generate_invite_code
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# 延迟生成邀请码
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def invite_code
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return generate_invite_code
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end
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# 生成邀请码
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CODES = %W(2 3 4 5 6 7 8 9 A B C D E F G H J K L N M O P Q R S T U V W X Y Z)
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def generate_invite_code
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code = read_attribute(:invite_code)
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if !code || code.size < 6
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code = CODES.sample(6).join
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return generate_invite_code if CourseGroup.where(invite_code: code).present?
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update_attribute(:invite_code, code)
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end
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code
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end
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end
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