thank you. it is good. 在 2012年6月25日星期一UTC+8上午3时54分56秒，Guido van Rossum写道： > > On Sunday, June 24, 2012 5:40:15 AM UTC-7, saintthor wrote: >> >> are there a more ops for the StructuredProperty? > > > StructuredProperty is essentially just a bunch of properties with funny > names. The cost depends on how many indexed properties you have in total in > an entity (including in structured properties). So e.g. these two (Flat and > Nested) below have the same cost: > > class Flat(ndb.Model): > name = ndb.StringProperty() > address_line1 = ndb.StringProperty() > address_line2 = ndb.StringProperty() > > and > > class Addres(ndb.Model): > line1 = ndb.StringProperty() > line2 = ndb.StringProperty() > > class Nested(ndb.Model): > name = ndb.StringProperty() > address = ndb.StructuredProperty(Address) > >
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