使用sanic-openapi时找不到swagger.json

Question

我正在尝试使用带有sanic的Sanic-OpenAPI模块来自动记录我自己的RESTful API。因此，我通过运行以下命令来安装它们：

pip install sanic sanic-openapi

# sanic version is 19.12.2
# sanic_openapi version is 0.6.1

我创建了这个简单的项目，顺便说一句，它是在他们的官方GitHub存储库中提供的。它看起来如下所示：

from sanic import Sanic, response
from sanic_openapi import swagger_blueprint


app = Sanic("app")
app.blueprint(swagger_blueprint)


@app.route("/")
async def test(request):
    return response.json({"hello": "world"})


if __name__ == "__main__":
    app.run(host="0.0.0.0", port=8000, debug=True)

这运行得很好！但是当我尝试访问http://localhost:8000/swagger时，它抛出了以下错误：

Traceback (most recent call last):
  File "/media/anwar/E/Chatbot/NLU_engine/py3.7/lib/python3.7/site-packages/sanic/app.py", line 974, in handle_request
    response = handler(request, *args, **kwargs)
  File "/media/anwar/E/Chatbot/NLU_engine/py3.7/lib/python3.7/site-packages/sanic_openapi/swagger.py", line 263, in spec
    return json(swagger_blueprint._spec)
  File "/media/anwar/E/Chatbot/NLU_engine/py3.7/lib/python3.7/site-packages/sanic/response.py", line 234, in json
    dumps(body, **kwargs),
TypeError: <sanic_openapi.spec.Spec object at 0x7effe3d2f910> is not JSON serializable
[2020-07-12 11:34:09 +0200] - (sanic.access)[INFO][127.0.0.1:37880]: GET http://localhost:8000/swagger/swagger.json  500 2649
[2020-07-12 11:34:09 +0200] [11014] [ERROR] Exception occurred while handling uri: 'http://localhost:8000/swagger/swagger.json'
Traceback (most recent call last):
  File "/media/anwar/E/Chatbot/NLU_engine/py3.7/lib/python3.7/site-packages/sanic/app.py", line 974, in handle_request
    response = handler(request, *args, **kwargs)
  File "/media/anwar/E/Chatbot/NLU_engine/py3.7/lib/python3.7/site-packages/sanic_openapi/swagger.py", line 263, in spec
    return json(swagger_blueprint._spec)
  File "/media/anwar/E/Chatbot/NLU_engine/py3.7/lib/python3.7/site-packages/sanic/response.py", line 234, in json
    dumps(body, **kwargs),
TypeError: <sanic_openapi.spec.Spec object at 0x7effe3d2f910> is not JSON serializable

Answer 1

经过大约两个小时的搜索，我在他们的官方GitHub存储库的this issue中找到了解决方案。根据这个问题，原因是sanic-openapi与ujson的最后两个版本(2.x和3.x)不兼容。

因此，要解决此问题，您需要将您的ujson包降级为1.35，如下所示：

pip install ujson==1.35

现在，它完美地工作了：

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