what are different types of associations?

Question

Accepted Answer

Different types of associations include one-to-one, one-to-many, many-to-many, and polymorphic associations.

One-to-one association: each record in one table is associated with one and only one record in another table.
One-to-many association: each record in one table is associated with one or more records in another table.
Many-to-many association: each record in one table is associated with one or more records in another table, and vice versa.
Polymorphic association: a single association that can belong to multiple models.
Examples: a user has one profile (one-to-one), a blog post has many comments (one-to-many), a user can have many roles and a role can belong to many users (many-to-many), an image can belong to a user or a post (polymorphic).

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