Make One-to-Many Association

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Task

• Add one-to-many association between User and BlogPost as per diagram below.
  • Each User object has many BlogPost objects.
  • Each BlogPost object belongs to exactly one User object.

Steps

① Add association declaration

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

② Add roles and multiplicities to association

• Add "author 1" on User side to specify multiplicity 1 and role name author.
• Add "post *" on BlogPost side to specify multiplicity * and role name post.

③ Add association name and reading direction

• Add : has > on end of declaration to specify association name has with reading-direction triangle pointing toward BlogPost class.

Reference Code

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