Beispiel #1
0
func SerializeModel(backend db.Backend, m kit.Model) (*ApiModel, []*ApiModel, apperror.Error) {
	modelData, err := backend.ModelToMap(m, true, false)
	if err != nil {
		return nil, nil, apperror.Wrap(err, "model_convert_error", "")
	}

	info := backend.ModelInfo(m.Collection())

	data := &ApiModel{
		Type:       m.Collection(),
		Id:         m.GetStrId(),
		Attributes: modelData,
	}

	// Build relationship data.
	includedModels := make([]*ApiModel, 0)

	// Check every model  field.

	r := reflector.R(m).MustStruct()
	for fieldName, rel := range info.Relations() {
		// Retrieve the related model.
		field := r.Field(fieldName)
		if field != nil {
			return nil, nil, apperror.Wrap(err, "model_get_field_error")
		}

		// If field is zero value, skip.
		if field.IsZero() {
			continue
		}

		related := make([]kit.Model, 0)

		if !rel.IsMany() {
			// Make sure that we have a pointer.
			if !field.IsPtr() {
				field = field.Addr()
			}
			related = append(related, field.Interface().(kit.Model))
		} else {
			slice := field.MustSlice()
			for _, item := range slice.Items() {
				if !item.IsPtr() {
					item = item.Addr()
				}
				related = append(related, item.Interface().(kit.Model))
			}
		}

		for _, relatedModel := range related {
			// Convert the related model.
			relationData, included, err := SerializeModel(backend, relatedModel)
			if err != nil {
				return nil, nil, apperror.Wrap(err, "included_model_serialize_error", "")
			}

			// Build relation info and set in in relationships map.
			relation := &ApiModel{
				Type: relatedModel.Collection(),
				Id:   relatedModel.GetStrId(),
			}

			isSingle := !rel.IsMany()
			data.AddRelation(rel.MarshalName(), relation, isSingle)

			// Add related model to included data.
			includedModels = append(includedModels, relationData)

			// Add nested included models to included data.
			includedModels = append(includedModels, included...)
		}
	}

	return data, includedModels, nil
}