attr_accessor 上没有方法错误

Question

Model.rb

class BaseTable < ApplicationRecord
before_save :ConverterArray
serialize :conF_string
attr_accessor :valv

def initialize(valv)
    @valv = valv
end
#  def self.Conf_count  # self. is used when u have to call the method on te whole class example User.Conf_count
#      Confirmer.count
#  end

def ConverterArray  # self. is not used when u have to call the method on the instance variable for example user = User.new, user.ConverterArray
    count = Confirmer.count
    index = Array.new(count, 0)
    conf = conF_string.map(&:to_i)
    conf.each do |n|
        index[n] = 1
    end
    index = index*""
    self.conF_string = index
end

def DecoderArray
    count = Confirmer.count
    value = []
    conf = conF_string.split("")
    i = 0
    conf.each_with_index do |n,index|
        if n=="1"
            value[i] = index
            i+=1
        end
    end
    @valv = value
end
end

尝试使用 rails 控制台中的 object.DecoderArray.valv 获取值数组，但出现无方法错误。我是不是用错了attr_accessor。

Answer 1

每当您编辑文件并打开 rails console 时，您需要重新启动才能将更改应用到控制台。重启可以使用方法Rails::ConsoleMethods#reload!.

您可以在 rails console.

中简单地运行 reload!

attr_accessor 上没有方法错误

Getting no method error on attr_accessor

ruby-on-rails

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