CREATE TABLE "my_table" (
  "id" serial PRIMARY KEY
);

// configuration.go
package main

import (
	"flag"

	"gorm.io/driver/postgres"
	"gorm.io/gen"
	"gorm.io/gorm"
)

func main() {
	var outPath string
	var dsn string
	flag.StringVar(&outPath, "outPath", "", "outPath")
	flag.StringVar(&dsn, "dsn", "", "dsn")
	flag.Parse()

	// Initialize the generator with configuration
	g := gen.NewGenerator(gen.Config{
		OutPath:       outPath, // output directory, default value is ./query
		Mode:          gen.WithDefaultQuery | gen.WithQueryInterface,
		FieldNullable: true,
	})

	// Initialize a *gorm.DB instance
	db, err := gorm.Open(postgres.Open(dsn), &gorm.Config{})
	if err != nil {
		panic(err)
	}

	g.UseDB(db)
	g.ApplyBasic(g.GenerateModel("my_table", gen.WithMethod(CommonMethod{})))
	g.Execute()
}

type CommonMethod struct {
	ID int32
}

func (m *CommonMethod) IsEmpty() bool {
	if m == nil {
		return true
	}
	return m.ID == 0
}

func (m *CommonMethod) GetID() int {
	return int(m.ID)
}

// Code generated by gorm.io/gen. DO NOT EDIT.
// Code generated by gorm.io/gen. DO NOT EDIT.
// Code generated by gorm.io/gen. DO NOT EDIT.

package model

const TableNameMyTable = "my_table"

// MyTable mapped from table <my_table>
type MyTable struct {
	ID int32 `gorm:"column:id;primaryKey;autoIncrement:true" json:"id"`
}

// TableName MyTable's table name
func (*MyTable) TableName() string {
	return TableNameMyTable
}