Function GetScopeCollectionsFromIndexDef

collection_utils.go:297–331

----------------------------------------------------------------------------- API to retrieve the scope & unique list of collection names from the provided index definition.

(indexDef *cbgt.IndexDef)

// API to retrieve the scope & unique list of collection names from the
// provided index definition.
func GetScopeCollectionsFromIndexDef(indexDef *cbgt.IndexDef) (
	scope string, collections []string, err error) {
	if indexDef == nil {
		return "", nil, fmt.Errorf("no index-def provided")
	}

	bp := NewBleveParams()
	if len(indexDef.Params) > 0 {
		if err = json.Unmarshal([]byte(indexDef.Params), bp); err != nil {
			return "", nil, err
		}

		if strings.HasPrefix(bp.DocConfig.Mode, ConfigModeCollPrefix) {
			if im, ok := bp.Mapping.(*mapping.IndexMappingImpl); ok {
				var collectionNames []string
				scope, collectionNames, _, err := getScopeCollTypeMappings(im, false)
				if err != nil {
					return "", nil, err
				}

				uniqueCollections := map[string]struct{}{}
				for _, coll := range collectionNames {
					if _, exists := uniqueCollections[coll]; !exists {
						uniqueCollections[coll] = struct{}{}
						collections = append(collections, coll)
					}
				}

				return scope, collections, nil
			}
		}
	}

	return "_default", []string{"_default"}, nil
}

func multiCollection(colls []Collection) bool {
	hash := make(map[string]struct{}, 1)