/
decimal.go
62 lines (53 loc) · 1.52 KB
/
decimal.go
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package mongodb
import (
"fmt"
"go.mongodb.org/mongo-driver/bson"
"reflect"
"github.com/shopspring/decimal"
"go.mongodb.org/mongo-driver/bson/bsoncodec"
"go.mongodb.org/mongo-driver/bson/bsonrw"
"go.mongodb.org/mongo-driver/bson/primitive"
)
type Decimal decimal.Decimal
func (d Decimal) DecodeValue(dc bsoncodec.DecodeContext, vr bsonrw.ValueReader, val reflect.Value) error {
decimalType := reflect.TypeOf(decimal.Decimal{})
if !val.IsValid() || !val.CanSet() || val.Type() != decimalType {
return bsoncodec.ValueDecoderError{
Name: "decimalDecodeValue",
Types: []reflect.Type{decimalType},
Received: val,
}
}
var value decimal.Decimal
switch vr.Type() {
case bson.TypeDecimal128:
dec, err := vr.ReadDecimal128()
if err != nil {
return err
}
value, err = decimal.NewFromString(dec.String())
if err != nil {
return err
}
default:
return fmt.Errorf("received invalid BSON type to decode into decimal.Decimal: %s", vr.Type())
}
val.Set(reflect.ValueOf(value))
return nil
}
func (d Decimal) EncodeValue(ec bsoncodec.EncodeContext, vw bsonrw.ValueWriter, val reflect.Value) error {
decimalType := reflect.TypeOf(decimal.Decimal{})
if !val.IsValid() || val.Type() != decimalType {
return bsoncodec.ValueEncoderError{
Name: "decimalEncodeValue",
Types: []reflect.Type{decimalType},
Received: val,
}
}
dec := val.Interface().(decimal.Decimal)
dec128, err := primitive.ParseDecimal128(dec.String())
if err != nil {
return err
}
return vw.WriteDecimal128(dec128)
}