Make Many-to-Many Association

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Task

• Add many-to-many association between User and BlogPost as per diagram below.
  • Each User object has many BlogPost objects.
  • Each BlogPost object has many User objects.
  • With association class Favorite.

Steps

① Add Favorite class

• Add class declaration for Favorite.

② Add association declaration

• Add --- declaration to specify new association between User and BlogPost classes.

③ Add roles and multiplicities to association

• Add "user *" on User side to specify multiplicity * and role name user.
• Add "post *" on BlogPost side to specify multiplicity * and role name post.

④ Add association class declaration

• Add (User, BlogPost) to specify that association class will be on preceding association between these classes.
• Add .. Favorite on end of declaration to specify Favorite class as association class.

Reference Code

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