-
Notifications
You must be signed in to change notification settings - Fork 33
/
driver.go
89 lines (71 loc) · 1.74 KB
/
driver.go
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
package mysql
import (
"database/sql"
"fmt"
"github.com/elwinar/rambler/driver"
_ "github.com/mattn/go-sqlite3"
)
func init() {
driver.Register("sqlite", Driver{})
}
type Driver struct{}
func (d Driver) New(dsn, schema, table string) (driver.Conn, error) {
db, err := sql.Open("sqlite3", dsn)
if err != nil {
return nil, err
}
return Conn{
db: db,
schema: schema,
table: table,
}, nil
}
type Conn struct {
db *sql.DB
schema string
table string
}
func (c Conn) HasTable() (bool, error) {
var table string
err := c.db.QueryRow(`SELECT name FROM sqlite_master WHERE type = 'table' AND name = ?`, c.table).Scan(&table)
if err != nil && err != sql.ErrNoRows {
return false, err
}
if err == sql.ErrNoRows {
return false, nil
}
return true, nil
}
func (c Conn) CreateTable() error {
_, err := c.db.Exec(fmt.Sprintf(`CREATE TABLE %s ( migration VARCHAR(255) NOT NULL );`, c.table))
return err
}
func (c Conn) GetApplied() ([]string, error) {
rows, err := c.db.Query(fmt.Sprintf(`SELECT migration FROM %s ORDER BY migration ASC`, c.table))
if err != nil {
return nil, err
}
defer rows.Close()
var migrations []string
for rows.Next() {
var migration string
err := rows.Scan(&migration)
if err != nil {
return nil, err
}
migrations = append(migrations, migration)
}
return migrations, nil
}
func (c Conn) AddApplied(migration string) error {
_, err := c.db.Exec(fmt.Sprintf(`INSERT INTO %s (migration) VALUES (?)`, c.table), migration)
return err
}
func (c Conn) RemoveApplied(migration string) error {
_, err := c.db.Exec(fmt.Sprintf(`DELETE FROM %s WHERE migration = ?`, c.table), migration)
return err
}
func (c Conn) Execute(statement string) error {
_, err := c.db.Exec(statement)
return err
}