One to Many Relationships: Embedded Approach

• What is an "embedded" document?

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  • If you think of a document as an object:
    an embedded document is an object within an object
  • Example:
    {name:"Joe",address:
    {street:"Main St.",city:"New York"}}

• How do you store data using the "embedded" approach?

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  • Group the data to be embedded in a child document X
  • Add a field Y in the parent document
  • Assign the child document X to the field Y

• How would you query info contained in the embedded document?

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  • db.collection.find({"parent_field.child_field":value})