MongoDB Learning Note 2

Document model relationships model one-to-one relationships with Embedded documents Overview

Data in MongoDB have a flexible schema. Collections does not ENFOCE document structure.

Pattern

The normalized data model, the address document contains a reference to the patron document.

If The address data is frequently RETRIVEVD with name information, then with referencing, your application needs to issue Multiple queries to resolve the reference. The better data model would to being embed the address data in the patron data, as in the following document:

Model one-to-many relationships with Embedded Documents

Overviewpatternmodel one-to-many relationships with Document References Overviewpattern

MongoDB Learning Note 2