Rails在保存時截斷散列：

Question

我有一個帶有哈希密碼字段的滑軌模型（驚喜，驚喜），經過一些操作後，它的長度爲40個字符。我生成腳本/控制檯的用戶，並顯示如下：

#<User id: 1, firstname: "true", lastname: "false", username: "chaines51", hashed_password: "2Gr0GWvPunB3x5jomRTSTZJRIelC2RW103d7f3db"> 

我然後運行user_instance.save，返回true，然後用戶看起來是這樣的：

#<User id: 1, firstname: "true", lastname: "false", username: "chaines51", hashed_password: "103d7f3db"> 

任何想法正在發生其他30多個字符？我從字符串文本遷移變化的領域，但它仍然被截斷

編輯：型號代碼：

require 'digest/sha1' 

class User < ActiveRecord::Base 
    validates_presence_of :username, :password, :password_confirmation, :firstname, :lastname 
    validates_length_of :username, :within => 3..40 
    validates_length_of :password, :within => 5..40 
    validates_uniqueness_of :username 
    validates_confirmation_of :password 
    belongs_to :school 

    attr_protected :id, :salt 
    attr_accessor :password, :password_confirmation 

    def self.random_string(len) 
    #generate a random salt consisting of digits and letters. 
    chars = ("a".."z").to_a + ("A".."Z").to_a + ("0".."9").to_a 
    salt = "" 
    1.upto(len) { |i| salt << chars[rand(chars.size-1)] } 
    return salt 
    end 

    def password=(pass) 
    @password=pass 
    @salt = User.random_string(40-pass.length) 
    self.hashed_password = User.encrypt(@password, @salt) 
    end 

    def self.encrypt(pass, salt) 
    hash = Digest::SHA1.hexdigest(pass+salt) 
    hash.slice!(0..(40-pass.length-1)) 
    hash = salt+hash; 
    end 

    def self.checkhash(pass, hash) 
    salt = hash.slice!(0..40-pass.length-1) 
    rehash = User.encrypt(pass, salt) 
    return rehash == (salt+hash) 
    end 

    def self.authenticate(login, pass) 
    u = User.find_by_username(login) 
    return nil if u.nil? 
    return u if User.checkhash(pass, u.hashed_password) 
    nil 
    end 
end 

和DB/schema.rb是：

ActiveRecord::Schema.define(:version => 20100127034504) do 

    create_table "categories", :force => true do |t| 
    t.string "title" 
    end 

    create_table "questions", :force => true do |t| 
    t.string "question" 
    t.string "a" 
    t.string "b" 
    t.string "c" 
    t.string "d" 
    t.string "e" 
    t.datetime "created_at" 
    t.datetime "updated_at" 
    end 

    create_table "questions_quizzes", :id => false, :force => true do |t| 
    t.integer "app_id" 
    t.integer "category_id" 
    t.datetime "created_at" 
    t.datetime "updated_at" 
    end 

    create_table "quizzes", :force => true do |t| 
    t.string "title" 
    t.integer "category_id" 
    end 

    create_table "schools", :force => true do |t| 
    t.string "name" 
    t.integer "coach_id" 
    end 

    create_table "users", :force => true do |t| 
    t.string "firstname",       :null => false 
    t.string "lastname",       :null => false 
    t.string "username",       :null => false 
    t.boolean "needs_pass",  :default => false 
    t.integer "school_id" 
    t.datetime "created_at" 
    t.datetime "updated_at" 
    t.boolean "confirmed",  :default => false 
    t.text  "hashed_password" 
    end 

end 

Answer 1

顯示模型代碼和表格信息表格db/schema.rb將會非常有用。馬上，我可以告訴你，一個字符串列最多可以容納255個字符，沒有問題，所以可能有其他問題。如果有什麼限制，它很可能會出現在我上面提到的兩個地方之一中。