[RUBY] [Rails] Types of associations (one-to-many / many-to-many)

For organizing the brain

The first time programming beginners started learning Rails, huh? The association that is (should) be the point. There are many individual articles about associations, so I tried to sort out the types as a whole.

Types of associations

アソシエーション表.png It can be classified as shown in the table. (This time, the one-to-one association was omitted.)

Summary

--Many-to-many requires an intermediate table --Self-join requires a foreign key that references the same model

Recommended Posts

[Rails] Types of associations (one-to-many / many-to-many)

[Rails] Implementation of many-to-many category functions

[Rails] Many-to-many creation

[Rails] Introduction of PAY.JP

Rails Tutorial/Significance of Indexing

[Rails] Implement community membership application / approval function using many-to-many associations

Rails implementation of ajax removal

[Swift] Types of types-Basic knowledge-

[Rails] Introduction of devise Basics

[Ruby] Various types of each

Utilization of Rails Boolean type

[Rails 6] Implementation of search function

About types of code coverage

[Rails] Implementation of category function

[Rails] Implementation of like function