ambition/app/models/mission.rb

class Mission < ActiveRecord:: Base

    has_many :comments
    
    validates :name, presence: true
    validates :deadline, presence: true
    validates :priority, presence: true
    validates :status, presence: true
    validates :content, presence: true
    
    validate :priority_is_among_valid_values
    validate :status_is_among_valid_values
    
    private 
    
        def priority_is_among_valid_values
            
            if priority != 1 and  priority != 2 and priority != 3
                errors[:priority] = "priority is not among valid values"
            end
        end
        
        def status_is_among_valid_values
        
            values = ["未开始","进行中","已完成","已测试"]
            
            if !values.include?(status)
                errors[:status] = "status is not among valid values"
            end
        end
    
    
end