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46 lines
817 B
46 lines
817 B
3 months ago
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package dts
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import (
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"database/sql"
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"database/sql/driver"
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"encoding/json"
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)
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type NullString sql.NullString
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// Scan implements the [Scanner] interface.
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func (ns *NullString) Scan(value any) error {
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ss := new(sql.NullString)
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err := ss.Scan(value)
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ns.String = ss.String
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ns.Valid = ss.Valid
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return err
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}
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// Value implements the [driver.Valuer] interface.
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func (ns NullString) Value() (driver.Value, error) {
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if !ns.Valid {
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return nil, nil
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}
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return ns.String, nil
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}
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func (ns NullString) MarshalJSON() ([]byte, error) {
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if ns.Valid {
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return json.Marshal(ns.String)
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}
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return json.Marshal(nil)
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}
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func (ns *NullString) UnmarshalJSON(b []byte) error {
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if string(b) == "null" {
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ns.Valid = false
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return nil
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}
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err := json.Unmarshal(b, &ns.String)
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if err == nil {
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ns.Valid = true
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}
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return err
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}
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