null-extended

import "gopkg.in/nullbio/null.v6"

null-extended is a library with reasonable options for dealing with nullable SQL and JSON values

There are two packages: null and its subpackage zero.

Types in null will only be considered null on null input, and will JSON encode to null. If you need zero and null be considered separate values, use these.

Types in zero are treated like zero values in Go: blank string input will produce a null zero.String, and null Strings will JSON encode to "". Zero values of these types will be considered null to SQL. If you need zero and null treated the same, use these.

All types implement sql.Scanner and driver.Valuer, so you can use this library in place of sql.NullXXX. All types also implement: encoding.TextMarshaler, encoding.TextUnmarshaler, json.Marshaler, json.Unmarshaler and sql.Scanner.

null package

import "gopkg.in/nullbio/null.v6"

null.JSON

Nullable []byte.

Will marshal to JSON null if Invalid. []byte{} input will not produce an Invalid JSON, but []byte(nil) will. This should be used for storing raw JSON in the database.

Also has null.JSON.Marshal and null.JSON.Unmarshal helpers to marshal and unmarshal foreign objects.

null.Bytes

Nullable []byte.

Will marshal to JSON null if Invalid. []]byte{} input will not produce an Invalid Bytes, but []byte(nil) will. This should be used for storing binary data (bytea in PSQL for example) in the database.

null.String

Nullable string.

Marshals to JSON null if SQL source data is null. Zero (blank) input will not produce a null String. Can unmarshal from sql.NullString JSON input or string input.

null.Bool

Nullable bool.

Marshals to JSON null if SQL source data is null. False input will not produce a null Bool. Can unmarshal from sql.NullBool JSON input.

null.Time

Marshals to JSON null if SQL source data is null. Uses time.Time's marshaler. Can unmarshal from pq.NullTime and similar JSON input.

null.Float32

Nullable float32.

Marshals to JSON null if SQL source data is null. Zero input will not produce a null Float32. Can unmarshal from null.NullFloat32 JSON input.

null.Float64

Nullable float64.

Marshals to JSON null if SQL source data is null. Zero input will not produce a null Float64. Can unmarshal from sql.NullFloat64 JSON input.

null.Int

Nullable int.

Marshals to JSON null if SQL source data is null. Zero input will not produce a null Int. Can unmarshal from null.NullInt JSON input.

null.Int8

Nullable int8.

Marshals to JSON null if SQL source data is null. Zero input will not produce a null Int8. Can unmarshal from null.NullInt8 JSON input.

null.Int16

Nullable int16.

Marshals to JSON null if SQL source data is null. Zero input will not produce a null Int16. Can unmarshal from null.NullInt16 JSON input.

null.Int32

Nullable int32.

Marshals to JSON null if SQL source data is null. Zero input will not produce a null Int32. Can unmarshal from null.NullInt32 JSON input.

null.Int64

Nullable int64.

Marshals to JSON null if SQL source data is null. Zero input will not produce a null Int64. Can unmarshal from sql.NullInt64 JSON input.

null.Uint

Nullable uint.

Marshals to JSON null if SQL source data is null. Zero input will not produce a null Uint. Can unmarshal from null.NullUint JSON input.

null.Uint8

Nullable uint8.

Marshals to JSON null if SQL source data is null. Zero input will not produce a null Uint8. Can unmarshal from null.NullUint8 JSON input.

null.Uint16

Nullable uint16.

Marshals to JSON null if SQL source data is null. Zero input will not produce a null Uint16. Can unmarshal from null.NullUint16 JSON input.

null.Uint32

Nullable int32.

Marshals to JSON null if SQL source data is null. Zero input will not produce a null Uint32. Can unmarshal from null.NullUint32 JSON input.

null.Int64

Nullable uint64.

Marshals to JSON null if SQL source data is null. Zero input will not produce a null Uint64. Can unmarshal from null.NullUint64 JSON input.

Bugs

json's ",omitempty" struct tag does not work correctly right now. It will never omit a null or empty String. This might be fixed eventually.

License

BSD