from_pretrained加载本地模型报错

[fly2]

• 版本、环境信息 1）PaddleNLP和PaddlePaddle版本：PaddleNLP 2.3.5，PaddlePaddle2.3.1 2）系统环境：Linux:Debian GNU/Linux 11，python：3.8.12
• 复现信息：如为报错，请给出复现环境、复现步骤

下载ernie-3.0-medium-zh模型到本地后加载报错， 文件本地存放路径：

os.listdir('/model/ernie-3.0-medium-zh/')
['ernie_3.0_medium_zh_vocab.txt', 'model_config.json', 'special_tokens_map.json', 'tokenizer_config.json', 'vocab.txt', 'ernie_3.0_medium_zh.pdparams']

错误信息：

from paddlenlp.transformers import *
ernie = AutoModel.from_pretrained('/model/ernie-3.0-medium-zh/')
[2022-08-17 06:07:26,217] [    INFO] - We are using <class 'paddlenlp.transformers.ernie.modeling.ErnieModel'> to load '/model/ernie-3.0-medium-zh/'.
[2022-08-17 06:07:26,218] [    INFO] - Downloading /model/ernie-3.0-medium-zh/model_state.pdparams and saved to /model/ernie-3.0-medium-zh/
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
  File "/usr/local/lib/python3.8/site-packages/paddlenlp/transformers/auto/modeling.py", line 390, in from_pretrained
    return cls._from_pretrained(pretrained_model_name_or_path, task,
  File "/usr/local/lib/python3.8/site-packages/paddlenlp/transformers/auto/modeling.py", line 251, in _from_pretrained
    return model_class.from_pretrained(
  File "/usr/local/lib/python3.8/site-packages/paddlenlp/transformers/model_utils.py", line 272, in from_pretrained
    resolved_resource_files[file_id] = get_path_from_url(
  File "/usr/local/lib/python3.8/site-packages/paddlenlp/utils/downloader.py", line 156, in get_path_from_url
    assert is_url(url), "downloading from {} not a url".format(url)
AssertionError: downloading from /model/ernie-3.0-medium-zh/model_state.pdparams not a url

[guoshengCS]

抱歉，这里有些不太完善。您那边是直接使用的下载缓存的目录是吗，可以先save_pretrained保存一次然后使用保存的目录来加载，save过程中有些转换适配的处理，之前是考虑from_pretrained加载本地目录的话需要是保存适配过的，我们也看看完善下

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[songsurging]

需要先save_pretrained,直接从缓存目录中下载下来的信息不齐全，无法直接使用