forked from go-gorm/gorm
/
postgres.go
54 lines (44 loc) · 874 Bytes
/
postgres.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
package postgres
import (
"database/sql"
"database/sql/driver"
_ "github.com/lib/pq"
"github.com/lib/pq/hstore"
)
type Hstore map[string]*string
// Value get value of Hstore
func (h Hstore) Value() (driver.Value, error) {
hstore := hstore.Hstore{Map: map[string]sql.NullString{}}
if len(h) == 0 {
return nil, nil
}
for key, value := range h {
var s sql.NullString
if value != nil {
s.String = *value
s.Valid = true
}
hstore.Map[key] = s
}
return hstore.Value()
}
// Scan scan value into Hstore
func (h *Hstore) Scan(value interface{}) error {
hstore := hstore.Hstore{}
if err := hstore.Scan(value); err != nil {
return err
}
if len(hstore.Map) == 0 {
return nil
}
*h = Hstore{}
for k := range hstore.Map {
if hstore.Map[k].Valid {
s := hstore.Map[k].String
(*h)[k] = &s
} else {
(*h)[k] = nil
}
}
return nil
}