检查 Rails 中数组是否包含 true

Question

我试图限制每个失败的登录尝试ip。

我有以下内容：

  def validate(email, context)
    attempt = insert_into_attempts(email, context)
    return nil unless allow_login_by_ip(context.ip_address)
    flag_successful_attempt(attempt, context.ip_address)
    load_data
  end

  def allow_login_by_ip(ip_address)
    limit = LoginLimits.new(ip_address).limit
    last_5_attempts = AuthenticationAttempt.select("id","successful").where(ip: ip_address).last(5)
    last_5_attempts.include?("true")
  end 

  def insert_into_attempts(email, context)
    attempt = AuthenticationAttempt.new(
      :email => email,
      :ip => context.ip_address)
    attempt.save
  end 

  def flag_successful_attempt(attempt, ip_address)
    AuthenticationAttempt.where(ip: ip_address).last.update(successful: '1')
  end

我遇到的问题是它总是返回fasle。我一定是搜索array错误，但我不知道为什么。last_5_attempts是：

#<AuthenticationAttempt id: 1, successful: false>, 
#<AuthenticationAttempt id: 2, successful: false>, 
#<AuthenticationAttempt id: 3, successful: true>,
#<AuthenticationAttempt id: 4, successful: false>, 
#<AuthenticationAttempt id: 5, successful: false>]

Answer 1

如果你的意思是true，那么你的意思是：

last_5_attempts.include?(true)

因为：

true == "true"
# => false

但这还不够，因为您询问值数组是否有任何实际上只是, ( )[id, successful]的条目，所以您想要：true[1,true] != true

last_5_attempts.any? |id, successful|
  successful
end

您还可以id从列获取中省略，因为您不使用它，而是：

AuthenticationAttempt.where(ip: ip_address).pluck(:successful).last(5).any?

如果pluck使用单个参数，则返回一个“平面”数组，而不是数组的数组。

要检查最近 5 次中是否至少有一次成功登录或没有登录历史记录：

attempts = AuthenticationAttempt.where(ip: ip_address)
!attempts.any? or attempts.pluck(:successful).last(5).any?