Function parsePreloadMap

callbacks/preload.go:38–69

parsePreloadMap extracts nested preloads. e.g. // schema has a "k0" relation and a "k7.k8" embedded relation parsePreloadMap(schema, map[string][]interface{}{ clause.Associations: {"arg1"}, "k1": {"arg2"}, "k2.k3": {"arg3"}, "k4.k5.k6": {"arg4"}, }) /

(s *schema.Schema, preloads map[string][]interface{})

//		},
//	}
func parsePreloadMap(s *schema.Schema, preloads map[string][]interface{}) map[string]map[string][]interface{} {
	preloadMap := map[string]map[string][]interface{}{}
	setPreloadMap := func(name, value string, args []interface{}) {
		if _, ok := preloadMap[name]; !ok {
			preloadMap[name] = map[string][]interface{}{}
		}
		if value != "" {
			preloadMap[name][value] = args
		}
	}

	for name, args := range preloads {
		preloadFields := strings.Split(name, ".")
		value := strings.TrimPrefix(strings.TrimPrefix(name, preloadFields[0]), ".")
		if preloadFields[0] == clause.Associations {
			for _, relation := range s.Relationships.Relations {
				if relation.Schema == s {
					setPreloadMap(relation.Name, value, args)
				}
			}

			for embedded, embeddedRelations := range s.Relationships.EmbeddedRelations {
				for _, value := range embeddedValues(embeddedRelations) {
					setPreloadMap(embedded, value, args)
				}
			}
		} else {
			setPreloadMap(preloadFields[0], value, args)
		}
	}
	return preloadMap
}

func embeddedValues(embeddedRelations *schema.Relationships) []string {
	if embeddedRelations == nil {