entity-groups

When to use entity groups in GAE's Datastore

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问题 Following up on my earlier question regarding GAE Datastore entity hierarchies, I'm still confused about when to use entity groups . Take this simple example: Every Company has one or more Employee entities An Employee cannot be moved to another Company , and users that deal with one Company can never see the Employee s of another Company This looks like a case where I could make Employee a child entity of Company , but what are the practical consequences? Does this improve scalability, hurt

When to use entity groups in GAE's Datastore

阅读更多关于 When to use entity groups in GAE's Datastore

Following up on my earlier question regarding GAE Datastore entity hierarchies , I'm still confused about when to use entity groups . Take this simple example: Every Company has one or more Employee entities An Employee cannot be moved to another Company , and users that deal with one Company can never see the Employee s of another Company This looks like a case where I could make Employee a child entity of Company , but what are the practical consequences? Does this improve scalability, hurt scalability, or have no impact? What are other advantages/disadvantages of using or not using an

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