The completed codebase for the gorm many-to-many project

gorm_complete.go

package main

import (
	"fmt"
	"gorm.io/gorm"
	"log"
)

type User struct {
	gorm.Model

	Name   string  `json:"name"`
	Skills []Skill `gorm:"many2many:job_skill;"`
}

type Skill struct {
	Name string `gorm:"primary_key"`
}

func main() {

	// Connect to our local Postgres database
	db, err := gorm.Open("postgres", "postgres://localhost:5432/dev?sslmode=disable")
	if err != nil {
		log.Fatal(err)
	}
	defer db.Close()

	// Auto-generates our tables and schema!
	err = db.AutoMigrate(&User{}, &Skill{})
	if err != nil {
		log.Fatal(err)
	}

	// Create a User
	user := &User{
		Name: "Ari",
		Skills: []Skill{{Name: "Go"}, {Name: "Gorm"}},
	}

	// Add the user to the database
	db.Create(&user)

	// Print the users new ID from the database
	fmt.Println(user.ID)

  package main

import (
	"fmt"
	_ "github.com/lib/pq"
	"gorm.io/driver/postgres"
	"gorm.io/gorm"
	"log"
)

type User struct {
	gorm.Model

	Name   string  `json:"name"`
	Skills []Skill `gorm:"many2many:job_skill;"`
}

type Skill struct {
	Name string `gorm:"primary_key"`
}

func main() {


	db, err := gorm.Open(postgres.New(postgres.Config{
		DriverName: "postgres",
		DSN:        "postgres://localhost:5432/dev?sslmode=disable",
	}), &gorm.Config{})
	if err != nil {
		fmt.Printf("Error: %v\n", err)
	}


	// Auto-generates our tables and schema!
	err = db.AutoMigrate(&User{}, &Skill{})
	if err != nil {
		log.Fatal(err)
	}

	// Create a User
	user := &User{
		Name: "Ari",
		Skills: []Skill{{Name: "Go"}, {Name: "Gorm"}},
	}

	// Add the user to the database
	db.Create(&user)

	// Print the users new ID from the database
	fmt.Println(user.ID)

	// Update our users skills
	user.Skills = []Skill{{Name: "Python"}, {Name: "JavaScript"}}

	// Update user in db EXCEPT skills
	db.Omit("Skills").Updates(&user)

	// Now update just the Skills
	err = db.Session(&gorm.Session{FullSaveAssociations: true}).Model(&user).Association("Skills").Replace(&user.Skills)
	if err != nil {
		 fmt.Println(err)
	}

	// Print the users new ID from the database
	fmt.Println(user.Skills)
}
}