89 lines
2.2 KiB
Markdown
89 lines
2.2 KiB
Markdown
## null-extended [](https://godoc.org/github.com/nullbio/null) [](http://gocover.io/github.com/nullbio/null)
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*Forked from https://github.com/nullbio/null*
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null-extended is a library with reasonable options for dealing with nullable SQL and JSON values
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Types in `null` will only be considered null on null input, and will JSON encode to `null`.
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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`.
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---
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Install:
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`go get -u "gopkg.in/nullbio/null.v6"`
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### null package
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`import "gopkg.in/nullbio/null.v6"`
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The following are all types supported in this package. All types will marshal to JSON null if Invalid or SQL source data is null.
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#### null.JSON
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Nullable []byte.
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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.
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Also has `null.JSON.Marshal` and `null.JSON.Unmarshal` helpers to marshal and unmarshal foreign objects.
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#### null.Bytes
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Nullable []byte.
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[]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.
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#### null.String
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Nullable string.
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#### null.Byte
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Nullable byte.
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#### null.Bool
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Nullable bool.
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#### null.Time
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Nullable time.Time
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Marshals to JSON null if SQL source data is null. Uses `time.Time`'s marshaler.
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#### null.Float32
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Nullable float32.
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#### null.Float64
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Nullable float64.
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#### null.Int
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Nullable int.
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#### null.Int8
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Nullable int8.
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#### null.Int16
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Nullable int16.
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#### null.Int32
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Nullable int32.
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#### null.Int64
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Nullable int64.
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#### null.Uint
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Nullable uint.
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#### null.Uint8
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Nullable uint8.
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#### null.Uint16
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Nullable uint16.
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#### null.Uint32
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Nullable int32.
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#### null.Int64
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Nullable uint64.
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### Bugs
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`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](https://github.com/golang/go/issues/4357).
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### License
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BSD
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