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30 lines
593 B
Go
30 lines
593 B
Go
package models
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import (
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"encoding/json"
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"time"
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)
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// NullableTime distinguishes an absent JSON field from an explicit null in
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// PATCH payloads. Absent leaves the column untouched; null clears it.
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type NullableTime struct {
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Set bool `json:"-"`
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Value *time.Time `json:"-"`
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}
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func (n *NullableTime) UnmarshalJSON(b []byte) error {
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n.Set = true
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if string(b) == "null" {
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n.Value = nil
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return nil
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}
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return json.Unmarshal(b, &n.Value)
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}
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func (n NullableTime) MarshalJSON() ([]byte, error) {
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if n.Value == nil {
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return []byte("null"), nil
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}
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return json.Marshal(n.Value)
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}
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