When implementing configuration checking in a custom connector using the python cdk, can I assume that the config contains all the values listed in my spec? Or do I have to validate they exist as well?

When implementing the

check

operation in your custom connector using the Python CDK, you can assume that the user-supplied configuration contains the values described in the

spec.yaml

. This means if your

spec.yaml

specifies that the source requires certain inputs, such as a

username

and

password

, the config object should contain these values. However, it's important to note that while the config object should contain the values, it doesn't guarantee that these values are valid or can be used to successfully connect to the underlying data source. Therefore, your

check

operation should verify the validity of these inputs. For example, if you're checking the validity of a currency input, you might have something like this:

python def check_connection(self, logger, config) -> Tuple[bool, any]:    accepted_currencies = {"USD", "JPY", "BGN", "CZK", "DKK"} # assume these are the only allowed currencies    input_currency = config['base']    if input_currency not in accepted_currencies:    return False, f"Input currency {input_currency} is invalid. Please input one of the following currencies: {accepted_currencies}"    else:    return True, None

In this example, the

check_connection

function is checking if the

input_currency

from the config is in the list of

accepted_currencies

. If it's not, it returns

False

and an error message. If it is, it returns

True

and

None

. You can find more details about implementing the

check

operation in the [Airbyte documentation](https://docs.airbyte.com/connector-development/tutorials/cdk-tutorial-python-http/connection-checking).

@kapa.ai in other words, using that example, I do not need to check that

config

contains

base

because that has been validated somewhere upstream already?

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