RedisNil 没有值.

SpanFromContext returns the Transport value stored in ctx, if any.

ConfValidationError is the validation error returned by Conf.Validate if the designated constraints aren't met.

TlsValidationError is the validation error returned by Tls.Validate if the designated constraints aren't met.

ConfMultiError is an error wrapping multiple validation errors returned by Conf.ValidateAll() if the designated constraints aren't met.

TlsMultiError is an error wrapping multiple validation errors returned by Tls.ValidateAll() if the designated constraints aren't met.