upgrade from go-pg to bun

database/migrations/1_initial.go

@@ -0,0 +1,66 @@
+package migrations
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/uptrace/bun"
+)
+
+const accountTable = `
+CREATE TABLE accounts (
+id serial NOT NULL,
+created_at timestamp with time zone NOT NULL DEFAULT current_timestamp,
+updated_at timestamp with time zone DEFAULT current_timestamp,
+last_login timestamp with time zone NOT NULL DEFAULT current_timestamp,
+email text NOT NULL UNIQUE,
+name text NOT NULL,
+active boolean NOT NULL DEFAULT TRUE,
+roles text[] NOT NULL DEFAULT '{"user"}',
+PRIMARY KEY (id)
+)`
+
+const tokenTable = `
+CREATE TABLE tokens (
+id serial NOT NULL,
+created_at timestamp with time zone NOT NULL DEFAULT current_timestamp,
+updated_at timestamp with time zone NOT NULL DEFAULT current_timestamp,
+account_id int NOT NULL REFERENCES accounts(id),
+token text NOT NULL UNIQUE,
+expiry timestamp with time zone NOT NULL,
+mobile boolean NOT NULL DEFAULT FALSE,
+identifier text,
+PRIMARY KEY (id)
+)`
+
+func init() {
+	up := []string{
+		accountTable,
+		tokenTable,
+	}
+
+	down := []string{
+		`DROP TABLE tokens`,
+		`DROP TABLE accounts`,
+	}
+
+	Migrations.MustRegister(func(ctx context.Context, db *bun.DB) error {
+		fmt.Println("creating initial tables")
+		for _, q := range up {
+			_, err := db.Exec(q)
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	}, func(ctx context.Context, db *bun.DB) error {
+		fmt.Println("dropping initial tables")
+		for _, q := range down {
+			_, err := db.Exec(q)
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+}

database/migrations/2_bootstrap_users.tx.down.sql

@@ -0,0 +1 @@
+TRUNCATE accounts CASCADE

database/migrations/2_bootstrap_users.up.sql

@@ -0,0 +1,8 @@
+INSERT INTO accounts (id, email, name, active, roles)
+VALUES (DEFAULT, 'admin@example.com', 'Admin Example', true, '{admin}');
+
+--bun:split
+
+INSERT INTO accounts (id, email, name, active)
+VALUES (DEFAULT, 'user@example.com', 'User Example', true);
+

database/migrations/3_add_profile_table.go

@@ -0,0 +1,53 @@
+package migrations
+
+import (
+	"context"
+	"fmt"
+
+	"github.com/uptrace/bun"
+)
+
+const profileTable = `
+CREATE TABLE profiles (
+id serial NOT NULL,
+updated_at timestamp with time zone NOT NULL DEFAULT current_timestamp,
+account_id int NOT NULL REFERENCES accounts(id),
+theme text NOT NULL DEFAULT 'default',
+PRIMARY KEY (id)
+)`
+
+const bootstrapAccountProfiles = `
+INSERT INTO profiles(account_id) VALUES(1);
+INSERT INTO profiles(account_id) VALUES(2);
+`
+
+func init() {
+	up := []string{
+		profileTable,
+		bootstrapAccountProfiles,
+	}
+
+	down := []string{
+		`DROP TABLE profiles`,
+	}
+
+	Migrations.MustRegister(func(ctx context.Context, db *bun.DB) error {
+		fmt.Println("create profile table")
+		for _, q := range up {
+			_, err := db.Exec(q)
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	}, func(ctx context.Context, db *bun.DB) error {
+		fmt.Println("drop profile table")
+		for _, q := range down {
+			_, err := db.Exec(q)
+			if err != nil {
+				return err
+			}
+		}
+		return nil
+	})
+}

database/migrations/main.go

@@ -0,0 +1,49 @@
+package migrations
+
+import (
+	"context"
+	"embed"
+	"fmt"
+	"log"
+
+	"github.com/dhax/go-base/database"
+	"github.com/uptrace/bun/migrate"
+)
+
+//go:embed *.sql
+var sqlMigrations embed.FS
+
+var Migrations = migrate.NewMigrations()
+
+func init() {
+	if err := Migrations.Discover(sqlMigrations); err != nil {
+		panic(err)
+	}
+}
+
+// Migrate runs all migrations
+func Migrate() {
+	db, err := database.DBConn()
+	if err != nil {
+		log.Fatal(err)
+	}
+	defer db.Close()
+
+	migrator := migrate.NewMigrator(db, Migrations)
+
+	err = migrator.Init(context.Background())
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	group, err := migrator.Migrate(context.Background())
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	if group.ID == 0 {
+		fmt.Printf("there are no new migrations to run\n")
+	} else {
+		fmt.Printf("migrated to %s\n", group)
+	}
+}