'Config' object has no attribute '_metadata'

这个错误是由于在运行mmdetection训练自己的coco数据集时，配置文件中缺少了'device'属性导致的。你可以通过在tools/train.py文件的meta\['config'\] = cfg.pretty_text下面添加如下代码来解决这个问题：cfg.device='cuda'。\[1\]

另外，你提到了一个关于Flask程序生成数据库迁移文件时的错误。这个错误是由于在创建Migrate对象时，少传递了一个参数导致的。你需要在创建Migrate对象时同时传递"app"和"db"参数，例如：migrate = Migrate(app, db)。\[2\]

最后，你还提到了一个关于django序列化的问题。根据你提供的代码，看起来你在序列化数据时传递的格式不正确。你可以使用django.core.serializers下的serialize函数来序列化数据，该函数会根据指定的格式选择对应的序列器进行序列化操作。确保你传递的格式是正确的，并且在调用serialize函数时传递正确的参数。\[3\]
#### 引用[.reference_title]
- *1* [AttributeError: ‘ConfigDict‘ object has no attribute ‘device](https://blog.csdn.net/m0_60772977/article/details/125689187)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *2* [Flask：报AttributeError: 'NoneType' object has no attribute 'metadata'错误](https://blog.csdn.net/qq_25046261/article/details/79006171)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
- *3* [AttributeError: 'tuple' object has no attribute '_meta' 解决方案](https://blog.csdn.net/weixin_44266650/article/details/88991936)[target="_blank" data-report-click={"spm":"1018.2226.3001.9630","extra":{"utm_source":"vip_chatgpt_common_search_pc_result","utm_medium":"distribute.pc_search_result.none-task-cask-2~all~insert_cask~default-1-null.142^v91^insertT0,239^v3^insert_chatgpt"}} ] [.reference_item]
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