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class Department < ActiveRecord::Base
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belongs_to :school
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has_many :department_members, :dependent => :destroy
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# apply_add_departments 不能关联删除 tidings表有关联
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has_many :apply_add_departments
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has_many :tidings, as: :container, dependent: :destroy
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attr_accessible :name, :school_id, :is_auth, :identifier, :is_delete, :host_count
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scope :is_active, lambda{where(:is_delete => false)}
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scope :is_delete, lambda{where(:is_delete => true)}
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# 如果 identifier 字段存在就取identifier 否则取id
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def to_param
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self.identifier.present? ? identifier : id
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end
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end
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