mirror of https://github.com/mattn/go-sqlite3.git
82 lines
1.6 KiB
Go
82 lines
1.6 KiB
Go
package main
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import (
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"database/sql"
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"database/sql/driver"
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"encoding/json"
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"fmt"
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_ "github.com/mattn/go-sqlite3"
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"log"
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"os"
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)
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type Tag struct {
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Name string `json:"name"`
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Country string `json:"country"`
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}
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func (t *Tag) Scan(value interface{}) error {
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return json.Unmarshal([]byte(value.(string)), t)
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}
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func (t *Tag) Value() (driver.Value, error) {
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b, err := json.Marshal(t)
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return string(b), err
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}
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func main() {
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os.Remove("./foo.db")
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db, err := sql.Open("sqlite3", "./foo.db")
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if err != nil {
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log.Fatal(err)
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}
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defer db.Close()
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_, err = db.Exec(`create table foo (tag jsonb)`)
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if err != nil {
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log.Fatal(err)
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}
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stmt, err := db.Prepare("insert into foo(tag) values(?)")
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if err != nil {
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log.Fatal(err)
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}
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defer stmt.Close()
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_, err = stmt.Exec(`{"name": "mattn", "country": "japan"}`)
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if err != nil {
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log.Fatal(err)
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}
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_, err = stmt.Exec(`{"name": "michael", "country": "usa"}`)
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if err != nil {
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log.Fatal(err)
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}
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var country string
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err = db.QueryRow("select tag->>'country' from foo where tag->>'name' = 'mattn'").Scan(&country)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Println(country)
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var tag Tag
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err = db.QueryRow("select tag from foo where tag->>'name' = 'mattn'").Scan(&tag)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Println(tag.Name)
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tag.Country = "日本"
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_, err = db.Exec(`update foo set tag = ? where tag->>'name' == 'mattn'`, &tag)
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if err != nil {
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log.Fatal(err)
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}
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err = db.QueryRow("select tag->>'country' from foo where tag->>'name' = 'mattn'").Scan(&country)
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if err != nil {
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log.Fatal(err)
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}
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fmt.Println(country)
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}
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