Golang database/sql/driver.NotNull type and ConvertValue function example

package database/sql/driver

NotNull is a type that implements ValueConverter by disallowing nil values but otherwise delegating to another ValueConverter.

Golang database/sql/driver.NotNull type usage and ConvertValue function example

 type NotNull struct {
 Converter ValueConverter
 }

 func (n NotNull) ConvertValue(v interface{}) (Value, error) {
 if v == nil {
  return nil, fmt.Errorf("nil value not allowed")
 }
 return n.Converter.ConvertValue(v)
 }

References :

https://golang.org/src/pkg/database/sql/driver/types.go

http://golang.org/pkg/database/sql/driver/#NotNull

http://golang.org/pkg/database/sql/driver/#NotNull.ConvertValue