Ruby错误：未定义的局部变量或方法“ c”

Question

我正在处理ruby应用程序，但遇到一个奇怪的错误，我相信可能是由activerecord / activemodel引起的。错误如下：

Error on PaymentTransaction::Normal: undefined local variable or method `c' for #<Deposits::Mobitglobal:0x0055995b000b78>
/home/deploy/peatio/vendor/bundle/ruby/2.2.0/gems/activemodel-4.0.12/lib/active_model/attribute_methods.rb:439:in `method_missing'
/home/deploy/peatio/vendor/bundle/ruby/2.2.0/gems/activerecord-4.0.12/lib/active_record/attribute_methods.rb:168:in `method_missing'

我尝试使用ruby-2.3.0作为建议的解决方案，认为该版本中的activerecord / activemodel处理它的方式有所不同。但是结果是一样的。

该过程从以下文件开始：coin_rpc.rb

require 'net/http'
require 'uri'
require 'json'

class CoinRPC

  class JSONRPCError < RuntimeError; end
  class ConnectionRefusedError < StandardError; end

  def initialize(uri)
    @uri = URI.parse(uri)
  end

  def self.[](currency)
    c = Currency.find_by_code(currency.to_s)
    if c && c.rpc
      name = c.family || 'BTC'
      "::CoinRPC::#{name}".constantize.new(c.rpc)
    end
  end

  def method_missing(name, *args)
    handle name, *args
  end

  def handle
    raise "Not implemented"
  end
  class BTC < self
    def handle(name, *args)
      post_body = { 'method' => name, 'params' => args, 'id' => 'jsonrpc' }.to_json
      resp = JSON.parse( http_post_request(post_body) )
      raise JSONRPCError, resp['error'] if resp['error']
      result = resp['result']
      result.symbolize_keys! if result.is_a? Hash
      result
    end
    def http_post_request(post_body)
      http    = Net::HTTP.new(@uri.host, @uri.port)
      request = Net::HTTP::Post.new(@uri.request_uri)
      request.basic_auth @uri.user, @uri.password
      request.content_type = 'application/json'
      request.body = post_body
      http.request(request).body
    rescue Errno::ECONNREFUSED => e
      raise ConnectionRefusedError
    end

    def safe_getbalance
      begin
        getbalance
      rescue
        'N/A'
      end
    end
  end

  class ETH < self
    def handle(name, *args)
      post_body = {"jsonrpc" => "2.0", 'method' => name, 'params' => args, 'id' => '1' }.to_json
      resp = JSON.parse( http_post_request(post_body) )
      raise JSONRPCError, resp['error'] if resp['error']
      result = resp['result']
      result.symbolize_keys! if result.is_a? Hash
      result
    end
    def http_post_request(post_body)
      http    = Net::HTTP.new(@uri.host, @uri.port)
      request = Net::HTTP::Post.new(@uri.request_uri)
      request.basic_auth @uri.user, @uri.password
      request.content_type = 'application/json'
      request.body = post_body
      http.request(request).body
    rescue Errno::ECONNREFUSED => e
      raise ConnectionRefusedError
    end

    def safe_getbalance
      begin
        (open(@uri.host + '/cgi-bin/total.cgi').read.rstrip.to_f)
      rescue
        'N/A'
      end
    end
  end
end

错误似乎出现在上述文件的两个定义之间：

def self.[](currency)
    c = Currency.find_by_code(currency.to_s)
    if c && c.rpc
      name = c.family || 'BTC'
      "::CoinRPC::#{name}".constantize.new(c.rpc)
    end
  end

  def method_missing(name, *args)
    handle name, *args
  end

关于文件的文件名为“家族”名称，在以下文件中为“ BTC”：currency.yml

- id: 9
  key: mobitglobal
  code: mbg
  symbol: "฿"
  coin: true
  family: BTC
  quick_withdraw_max: 1000
  rpc: http://username:password@127.0.0.1:11111
  blockchain: http://cryptoid.net/explorer/MBGL?txid=#{txid}
  address_url: http://cryptoid.net/explorer/MBGL?txid=#{address}

此时，呼叫应在寻找“家庭”，然后将其设置为BTC，然后继续在coin_rpc.rb中进行操作：

class BTC < self
    def handle(name, *args)
      post_body = { 'method' => name, 'params' => args, 'id' => 'jsonrpc' }.to_json
      resp = JSON.parse( http_post_request(post_body) )
      raise JSONRPCError, resp['error'] if resp['error']
      result = resp['result']
      result.symbolize_keys! if result.is_a? Hash
      result
    end
    def http_post_request(post_body)
      http    = Net::HTTP.new(@uri.host, @uri.port)
      request = Net::HTTP::Post.new(@uri.request_uri)
      request.basic_auth @uri.user, @uri.password
      request.content_type = 'application/json'
      request.body = post_body
      http.request(request).body
    rescue Errno::ECONNREFUSED => e
      raise ConnectionRefusedError
    end

    def safe_getbalance
      begin
        getbalance
      rescue
        'N/A'
      end
    end

出于安全原因混淆了一些信息。 （用户名/密码）

预期结果为null，表示没有错误。但是相反，我得到了错误：

Error on PaymentTransaction::Normal: undefined local variable or method `c' for #<Deposits::Mobitglobal:0x0055995b000b78>
/home/deploy/peatio/vendor/bundle/ruby/2.2.0/gems/activemodel-4.0.12/lib/active_model/attribute_methods.rb:439:in `method_missing'
/home/deploy/peatio/vendor/bundle/ruby/2.2.0/gems/activerecord-4.0.12/lib/active_record/attribute_methods.rb:168:in `method_missing'

对于我可能会出错的任何帮助或见解，将不胜感激