我目前正处理一个非常奇怪的问题。我有一个ExportFile模型。在测试中的byebug控制台内，如果我拨打.all，我会看到：
>>> ExportFile.all
#<ActiveRecord::Relation [#<ExportFile id: 189, sequence_number: 1, filename: "DB_EXPORT_20151106173840.zip", status: 3, content: 2, created_at: "2015-12-09 12:54:56", updated_at: "2015-12-09 12:54:56", first_transfer_date: nil, failed_transfer_count: 0, successful_transfer_date: "2015-12-01 12:54:56">, #<ExportFile id: 190, sequence_number: 2, filename: "DB_EXPORT_20151106173840.zip", status: 3, content: 2, created_at: "2015-12-09 12:54:56", updated_at: "2015-12-09 12:54:56", first_transfer_date: nil, failed_transfer_count: 0, successful_transfer_date: "2015-12-01 12:54:56">, #<ExportFile id: 191, sequence_number: 3, filename: "DB_EXPORT_20151106173840.zip", status: 3, content: 2, created_at: "2015-12-09 12:54:56", updated_at: "2015-12-09 12:54:56", first_transfer_date: nil, failed_transfer_count: 0, successful_transfer_date: "2015-12-01 12:54:56">, #<ExportFile id: 192, sequence_number: 4, filename: "DB_EXPORT_20151106173840.zip", status: 3, content: 2, created_at: "2015-12-09 12:54:56", updated_at: "2015-12-09 12:54:56", first_transfer_date: nil, failed_transfer_count: 0, successful_transfer_date: "2015-12-01 12:54:56">, #<ExportFile id: 193, sequence_number: 5, filename: "DB_EXPORT_20151106173840.zip", status: 3, content: 2, created_at: "2015-12-09 12:54:56", updated_at: "2015-12-09 12:54:56", first_transfer_date: nil, failed_transfer_count: 0, successful_transfer_date: "2015-12-01 12:54:56">]>
但如果我尝试.count或.all.to_a，我什么也得不到：
>>> ExportFile.count
0
>>> ExportFile.all.to_a
[]
为什么会发生这种情况，我做错了什么？在运行上述代码段之前，我使用FactoryGirl.create_list(:export_file, 5)，如果它确实有所作为。
答案 0 :(得分：1)
我假设您在开发模式下处于控制台，但FactoryGirl在测试数据库中创建记录，因此您无权访问它们。
我认为，如果您使用ExportData记录为开发数据库设定种子，那么他们就会为您服务。
答案 1 :(得分：1)
升级byebug似乎解决了这个问题。我已经从8.1.0升级到8.2.1。很奇怪......