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class EcYear < ActiveRecord::Base
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default_scope :order => 'year desc'
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validates_uniqueness_of :year, :scope => :ec_major_school_id
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belongs_to :ec_major_school
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# 学生列表
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has_many :ec_year_students, :dependent => :destroy
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# 毕业要求
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has_many :ec_graduation_requirements, :dependent => :destroy
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# 培养目标
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has_one :ec_training_objective, :dependent => :destroy
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# 课堂配置
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has_many :ec_courses, :dependent => :destroy
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acts_as_attachable
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def prev_year
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ec_major_school.ec_years.find_by_year(year - 1)
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end
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end
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