method.signature_mismatch

A pipe differs from its signature


Type	`https://mthds.ai/errors/method.signature_mismatch`
Family	`method`: The method as written, the validation vocabulary included.
Domain	`method`: the method's author acts, by changing the method
Retry	`no`: repeating the operation fails the same way
HTTP status	`422`
Raised as	a problem document, sent as the body of an HTTP response or kept in a run's record

What it means

A concrete pipe's inputs or output differ from those of the signature it implements.

What to do

Compare the pipe with its signature's inputs and output, and change one or the other so that they agree.

Next steps

A problem carries the step aimed at whoever reads it: the first when its reader is the domain's actor, the method's author, and the second for any other reader.

Reader	Kind	Detail
The domain's actor	`change_method`	Make pipe '`{pipe}`' take the inputs and give the output its signature declares, then validate the method again.
Any other reader	`contact_owner`	Ask the method's owner to make pipe '`{pipe}`' match its signature.

Detail

The problem's detail is written from this template, filled with the occurrence's parameters:

Pipe '{pipe}' differs from the signature it implements ({finding}).

Parameters

Every parameter is present on every occurrence of the code.

Name	Type	Description
`pipe`	`identifier`	The concrete pipe.
`finding`	`caller_text`	How the pipe differs from its signature.