python - How can I know when I need another entity instead of a property? -


i making project in gae in have work orders have products. these products in turn have transactions associated them, may happen in different days , areas. have thought of different ways accomplish this, range 1 extreme other.

the first extreme store transactions dates , areas 1 big json object in jsonproperty of product. other 1 have entity each product/area, entity each transaction associated product/area.

i don't either of those, since first 1 @ risk of reaching 1mb limit per entity (although it's unlikely) , may require unnecessary processing, while second 1 sounds terribly wasteful (way many objects minimal content, generate indices).

there many options in between, instance having entity per product/area smaller json object in them, don't know how choose. there key questions can ask myself determine when entity needed or when property can enough?


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