Error Handling

spangle provides minimum error response by default. You can make custom error handler for any type of Exception .

Define handler

An error handler looks like normal view class, but has on_error method.

@api.handle(ValueError)
class Handle:
    # note: response body like `Response.text` are initialized.
    async def on_error(self, req, resp, e: ValueError):
        resp.status_code = 400
        resp.text = "Invalid request body."
        # to catch exceptions on server, set `reraise=True` .
        resp.reraise = True

You can also use ErrorHandler instance.

from spangle import Api, ErrorHandler

eh = ErrorHandler()

@eh.handle("TypeError")
class Handle:
    ...

api = Api()

api.add_error_handler(eh)