A quick example of tagging using Postgres in Golang

main.go

package main

import (
	"bytes"
	"database/sql"
	"encoding/csv"
	"errors"
	"fmt"
	_ "github.com/lib/pq"
)

type Post struct {
	Id   int64
	Name string
	Tags TagList
}

type TagList []string

func (self *TagList) Scan(src interface{}) error {
	asBytes, ok := src.([]byte)
	if !ok {
		return error(errors.New("Scan source was not []bytes"))
	}
	buf := bytes.NewBuffer(asBytes[1 : len(asBytes)-1])
	res, _ := csv.NewReader(buf).Read()
	*self = TagList(res)
	return nil
}

func main() {
	db, _ := sql.Open("postgres", "postgres://localhost/ttaylor?sslmode=disable")
	err := db.Ping()
	if err != nil {
		panic(err)
	}
	defer db.Close()

	db.Exec("CREATE TABLE IF NOT EXISTS posts (id serial PRIMARY KEY, name varchar(255), tags varchar[]);")
	db.Exec("TRUNCATE TABLE posts")
	db.Exec("INSERT INTO posts (name, tags) VALUES ('My First Post', ARRAY['tone.silly', 'topic.intro']);")

	row := db.QueryRow("SELECT * FROM posts LIMIT 1;")
	var post Post
	err = row.Scan(&post.Id, &post.Name, &post.Tags)
	if err != nil {
		panic(err)
	}

	for _, tag := range post.Tags {
		fmt.Println("Tag:", tag)
	}

	fmt.Printf("%+v\n", post)
}