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What are GORM relationships in Go?

An example of an AI chatbot conversation about GORM relationships in Go programming.

😀
You

Can you explain what GORM relationships are in Go?

MagicBuddy
MagicBuddy

GORM relationships define how different models interact with each other in a database. They include one-to-one, one-to-many, and many-to-many relationships.

😀
You

How do I set up a one-to-many relationship in GORM?

MagicBuddy
MagicBuddy

To set up a one-to-many relationship, you can define a foreign key in the child model that references the parent model. For example, if you have a User and Post model, the Post model would have a UserID field.

😀
You

Can you show me a code example for that?

MagicBuddy
MagicBuddy

Sure! Here's a simple example:

type User struct {
    ID   uint   `gorm:"primaryKey"`
    Name string
    Posts []Post `gorm:"foreignKey:UserID"`
}

type Post struct {
    ID     uint   `gorm:"primaryKey"`
    Title  string
    UserID uint
}

This sets up a one-to-many relationship where a user can have multiple posts.

😀
You

What about many-to-many relationships?

MagicBuddy
MagicBuddy

For many-to-many relationships, you need a join table. For example, if you have Student and Course models, you would create a StudentCourse join table to link them.

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