You have to store both A and B. At least in Python, and I assume in Java, storing A will not auto-persist B.
Robert On Wed, Sep 1, 2010 at 06:39, ping <[email protected]> wrote: > Hello, > I wonder whats the exact approach of storing one-to-many related > entities into the datastore. > for example having a Entity "A" which holds a list of entities "B" and > the entity "B" refers back to the entity "A". so they are related as 1- > to-many :) > Do i have to persist all "B" entities first when i want to persist a > "A" entity or is it enough to add the "B" entities to the List in "A" > and call the makePesistent() method just on the "A" entity? > Are the B entities stored automatically? because this is not the case > for me :/ > > greets > > -- > You received this message because you are subscribed to the Google Groups > "Google App Engine" group. > To post to this group, send email to [email protected]. > To unsubscribe from this group, send email to > [email protected]. > For more options, visit this group at > http://groups.google.com/group/google-appengine?hl=en. > > -- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To post to this group, send email to [email protected]. To unsubscribe from this group, send email to [email protected]. For more options, visit this group at http://groups.google.com/group/google-appengine?hl=en.
