Question

浏览器错误：

NoMethodError
undefined method `connect_timeout=' for #<Mysql2::Client:0x47f7570>

在我的浏览器上，出现了一个错误，即connect_timeout未定义。我很确定它与client.rb文件有关。我会告诉你这个档案。我不得不编辑其中一些以实际让Webrick运行起来。当我启动服务器时，除非我进行了更改，否则我的命令行上总会出现错误。我对我编辑的内容发表了评论。有时编辑随机的东西，其中一些工作，但他们在我的浏览器上产生不同的错误。我正在使用Windows 8机器。谢谢你的帮助。

module Mysql2
class Client
attr_reader :query_options, :read_timeout
@@default_query_options = {
  :as => :hash,                   # the type of object you want each row back as; also supports :array (an array of values)
  :async => false,                # don't wait for a result after sending the query, you'll have to monitor the socket yourself then eventually call Mysql2::Client#async_result
  :cast_booleans => false,        # cast tinyint(1) fields as true/false in ruby
  :symbolize_keys => false,       # return field names as symbols instead of strings
  :database_timezone => :local,   # timezone Mysql2 will assume datetime objects are stored in
  :application_timezone => nil,   # timezone Mysql2 will convert to before handing the object back to the caller
  :cache_rows => true,            # tells Mysql2 to use it's internal row cache for results
  #:connect_flags => REMEMBER_OPTIONS | LONG_PASSWORD | LONG_FLAG | TRANSACTIONS | PROTOCOL_41 | SECURE_CONNECTION,
  #I had to delete the line above because for some reason the command prompt said that each of the constants were undefined were not used in the right place or something
  :cast => true,
  :default_file => nil,
  :default_group => nil
}

def initialize (opts = {})
  opts = Mysql2::Util.key_hash_as_symbols( opts )
  @read_timeout = nil
  @query_options = @@default_query_options.dup
  @query_options.merge! opts

  #initialize_ext
  # the chrome page said that the above variable is undefined :P

  # Set default connect_timeout to avoid unlimited retries from signal interruption
  opts[:connect_timeout] = 120 unless opts.key?(:connect_timeout)

  [:reconnect, :connect_timeout, :local_infile, :read_timeout, :write_timeout, :default_file, :default_group, :secure_auth, :init_command].each do |key|
    next unless opts.key?(key)
    case key
    when :reconnect, :local_infile, :secure_auth
      send(:"#{key}=", !!opts[key])
    when :connect_timeout, :read_timeout, :write_timeout
      send(:"#{key}=", opts[key].to_i)
    else
      send(:"#{key}=", opts[key])
    end
  end

  # force the encoding to utf8
  self.charset_name = opts[:encoding] || 'utf8'

  ssl_options = opts.values_at(:sslkey, :sslcert, :sslca, :sslcapath, :sslcipher)
  ssl_set(*ssl_options) if ssl_options.any?

  if [:user,:pass,:hostname,:dbname,:db,:sock].any?{|k| @query_options.has_key?(k) }
    warn "============= WARNING FROM mysql2 ============="
    warn "The options :user, :pass, :hostname, :dbname, :db, and :sock will be deprecated at some point in the future."
    warn "Instead, please use :username, :password, :host, :port, :database, :socket, :flags for the options."
    warn "============= END WARNING FROM mysql2 ========="
  end

  user     = opts[:username] || opts[:user]
  pass     = opts[:password] || opts[:pass]
  host     = opts[:host] || opts[:hostname]
  port     = opts[:port]
  database = opts[:database] || opts[:dbname] || opts[:db]
  socket   = opts[:socket] || opts[:sock]
  flags    = opts[:flags] ? opts[:flags] | @query_options[:connect_flags] : @query_options[:connect_flags]

  # Correct the data types before passing these values down to the C level
  user = user.to_s unless user.nil?
  pass = pass.to_s unless pass.nil?
  host = host.to_s unless host.nil?
  port = port.to_i unless port.nil?
  database = database.to_s unless database.nil?
  socket = socket.to_s unless socket.nil?

  connect user, pass, host, port, database, socket, flags
end

def self.default_query_options
  @@default_query_options
end

def query_info
  info = query_info_string
  return {} unless info
  info_hash = {}
  info.split.each_slice(2) { |s| info_hash[s[0].downcase.delete(':').to_sym] = s[1].to_i }
  info_hash
end

private
  def self.local_offset
    ::Time.local(2010).utc_offset.to_r / 86400
  end

end
end

Answer 1

Mysql2::Client#initialize名为connect_timeout=，但客户端中没有此类attr_writer。

when :connect_timeout, :read_timeout, :write_timeout
  send(:"#{key}=", opts[key].to_i)
else

如果此客户端是您自己编写的，请在attr_accessor :connect_timeout的定义中添加Mysql2::Client并正确使用该属性。如果它来自其他库，请检查您的加载路径。您可能错过了一些打开Mysql2::Client并且猴子打了补丁的文件。

undefined方法：connect_timeout

1 个答案: