在不知道祖先的情况下从数据存储表中删除实体

Question

Is it possible to delete entities from a datastore table without knowing their ancestor? I wish to delete all entities older than a specific date, but there are many different ancestors.

Answer 1

Provided you have indexed them to be queried by date, you can query the entities by date.

The query will return the entities of interest. You can find out the ancestor of a given entity from its key - the ancestor's key is part of the entity's key.