Errors in strawberry

Strawberry has built-in errors for when something goes wrong with the creation and usage of the schema.

It also provides a custom exception handler for improving how errors are printed and to make it easier to find the exception source, for example the following code:

import strawberry
class Query:
def hello_world(self):
return "Hello there!"
schema = strawberry.Schema(query=Query)

will show the following exception on the command line:

error: Missing annotation for field `hello_world`
6 | @strawberry.field
❱ 7 | def hello_world(self):
^^^^^^^^^^^ resolver missing annotation
8 | return "Hello there!"
To fix this error you can add an annotation, like so `def hello_world(...) -> str:`
Read more about this error on

These errors are only enabled when rich and libcst are installed. You can install Strawberry with errors enabled by running:

Terminal window
pip install "strawberry-graphql[cli]"

If you want to disable the errors you can do so by setting the STRAWBERRY_DISABLE_RICH_ERRORS environment variable to 1 .

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