Is it possible to store multiple types of Objects into 1 mongodb collection?

Question

using document oriënted database mongodb and the Object Document Mapper (ODM) morphia

Lets say we have 3 different classes; Object, Category and Action.
These object are all stored in the collections; objects, categories and actions.

Category and Action are references of Object

@Entity("objects")
public class Object {

    @Id
    @Property("id")
    private ObjectId id;

    @Reference
    private Category category;
    private Action action;
    ...
}

@Entity("categories")
public class Category {

    @Id
    public String categoryTLA;
    public String categoryName;
    ...
}

@Entity("actions")
public class Action implements BaseEntity {

    @Id
    public String action;
    public int accesLevel;
    ...
}

The documents with the current implementation are stored like:

• Mongo (Server/location)
  • store (database)
    • objects (collection)
      • object (document)
      • object
      • object
    • categories
      • categorie
      • categorie
      • categorie
    • actions
      • action
      • action
      • action

Is it possible to store 2 different Objects, in this case Category and Action, in one collection, like shown in the next example? Both with their own identification!

• Mongo
  • store
    • objects
      • object
      • object
      • object
    • settings
      • categorie
      • categorie
      • categorie
      • action
      • action
      • action

Answer 1

yes. but probably you need to add field "documentType" to any document to distinguish documents