40 lines
838 B
Go
40 lines
838 B
Go
package sqlite
|
|
|
|
import (
|
|
"database/sql/driver"
|
|
"encoding/json"
|
|
"errors"
|
|
"reflect"
|
|
)
|
|
|
|
// JSONBlob type for marshaling/unmarshaling inner type to json.
|
|
type JSONBlob struct {
|
|
Data interface{}
|
|
}
|
|
|
|
// Scan implements interface.
|
|
func (blob *JSONBlob) Scan(value interface{}) error {
|
|
dataVal := reflect.ValueOf(blob.Data)
|
|
if value == nil || dataVal.Kind() == reflect.Ptr && dataVal.IsNil() {
|
|
return nil
|
|
}
|
|
bytes, ok := value.([]byte)
|
|
if !ok {
|
|
return errors.New("not a byte slice")
|
|
}
|
|
if len(bytes) == 0 {
|
|
return nil
|
|
}
|
|
err := json.Unmarshal(bytes, blob.Data)
|
|
return err
|
|
}
|
|
|
|
// Value implements interface.
|
|
func (blob *JSONBlob) Value() (driver.Value, error) {
|
|
dataVal := reflect.ValueOf(blob.Data)
|
|
if blob.Data == nil || dataVal.Kind() == reflect.Ptr && dataVal.IsNil() {
|
|
return nil, nil
|
|
}
|
|
return json.Marshal(blob.Data)
|
|
}
|