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Call tagify() early to intercept AttributeErrors #941

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Merged
merged 1 commit into from
Jan 2, 2024
Merged

Call tagify() early to intercept AttributeErrors #941

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10 changes: 10 additions & 0 deletions shiny/express/_run.py
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Original file line number Diff line number Diff line change
Expand Up @@ -39,6 +39,16 @@ def wrap_express_app(file: Path) -> App:
)

app_ui = run_express(file)
try:
# We tagify here, instead of waiting for the App object to do it when it wraps
# the UI in a HTMLDocument and calls render() on it. This is because
# AttributeErrors can be thrown during the tagification process, and we need to
# catch them here and convert them to a different type of error, because uvicorn
# specifically catches AttributeErrors and prints an error message that is
# misleading for Shiny Express. https://github.com/posit-dev/py-shiny/issues/937
app_ui = run_express(file).tagify()
except AttributeError as e:
raise RuntimeError(e) from e

def express_server(input: Inputs, output: Outputs, session: Session):
try:
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