Method GetMapKey

model/value_map.go:85–134

GetMapKey returns the value at the specified key in the map.

(key string)

// GetMapKey returns the value at the specified key in the map.
func (v *Value) GetMapKey(key string) (*Value, error) {
	switch {
	case v.isDencodingMap():
		m, err := v.dencodingMapValue()
		if err != nil {
			return nil, fmt.Errorf("error getting map: %w", err)
		}
		val, ok := m.Get(key)
		if !ok {
			return nil, MapKeyNotFound{Key: key}
		}
		if modelValue, isValue := val.(*Value); isValue {
			modelValue.setFn = func(newValue *Value) error {
				m.Set(key, newValue)
				return nil
			}
			return modelValue, nil
		}
		res := NewValue(val)
		res.setFn = func(newValue *Value) error {
			m.Set(key, newValue)
			return nil
		}
		return res, nil
	case v.isStandardMap():
		unpacked, err := v.UnpackUntilKind(reflect.Map)
		if err != nil {
			return nil, fmt.Errorf("error unpacking value: %w", err)
		}
		i := unpacked.value.MapIndex(reflect.ValueOf(key))
		if !i.IsValid() {
			return nil, MapKeyNotFound{Key: key}
		}
		res := NewValue(i)
		res.setFn = func(newValue *Value) error {
			mapRv, err := v.UnpackUntilKind(reflect.Map)
			if err != nil {
				return fmt.Errorf("error unpacking value: %w", err)
			}
			mapRv.value.SetMapIndex(reflect.ValueOf(key), newValue.value)
			return nil
		}
		return res, nil
	default:
		return nil, ErrUnexpectedType{
			Expected: TypeMap,
			Actual:   v.Type(),
		}
	}
}

// DeleteMapKey deletes the key from the map.
func (v *Value) DeleteMapKey(key string) error {