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Using bulkloader in App Engine, I can get properties set to certain values or to None (or null value). I can also leave them unset if I don’t include the property in bulkloader.yaml.
What I would like to do is set the property for some of the entities and leave the property unset for some other entities. Is there a way to do this?
There’s no way to do this with the standard YAML configuration of the bulkloader. Note, though, that most model frameworks, including the Python one built in to App Engine, will create any missing properties when you first write a record with them, so there’s not much point in going out of your way to leave them unspecified.