Implementation is unclean if architect's birth/death year is known only

[normade]

Implementation how it works if only the death year or birth year is known of a person is unclean.

It would be good to come up with a better solution or at least return clear data via the endpoints that the mobile apps can consume and display clean and correct data. which is not the case yet.

At the moment it is handled by a flag and the birthday and deathday is a datefield in the database each. That's why it always needs a day and month if it is set.