Question

我正在

BuyTagsController #index中的NoMethodError 未定义的方法`unpack＆＃39;为零：NilClass

第＃18行提取的来源（if($driver==='mssql' || $driver==='dblib') $pdoClass='CMssqlPdoAdapter'; elseif($driver==='sqlsrv') $pdoClass='CMssqlSqlsrvPdoAdapter';）：

buy_tags_controller.rb

应用程序跟踪：

  eco_producer.nreduction = eco_value['nreduction']
  str  = eco_value['image']
  eco_producer.image = Base64.decode64(str)
  eco_producer.save
end

Answer 1

>> Base64.decode64(nil)
    NoMethodError: undefined method `unpack' for nil:NilClass
      from C:/Ruby193/lib/ruby/1.9.1/base64.rb:58:in `decode64'
      from (irb):7
      from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.21/lib/rails/commands/console.rb:47:in `start'
      from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.21/lib/rails/commands/console.rb:8:in `start'
      from C:/Ruby193/lib/ruby/gems/1.9.1/gems/railties-3.2.21/lib/rails/commands.rb:41:in `<top (required)>'
      from C:/workspace/projects/YBWebFramework/director2/script/rails:11:in `require'
      from C:/workspace/projects/YBWebFramework/director2/script/rails:11:in `<top (required)>'
      from -e:1:in `load'
      from -e:1:in `<main>'

解决此问题。有一张支票，没有通过nil解码。像str .present那样的东西？然后执行下一行

未定义的方法`unpack＆＃39; for nil：NilClass image base64

1 个答案: