feat: allow creating single named vector

Author: bevzzz

src/collections/configure/types/vectorizer.ts

@@ -55,7 +55,7 @@ export type VectorConfigUpdate<N extends string | undefined, I extends VectorInd
 };
 
 export type VectorizersConfigCreate<T> =
-  | VectorConfigCreate<PrimitiveKeys<T>, undefined, VectorIndexType, Vectorizer>
+  | VectorConfigCreate<PrimitiveKeys<T>, string | undefined, VectorIndexType, Vectorizer>
   | VectorConfigCreate<PrimitiveKeys<T>, string, VectorIndexType, Vectorizer>[];
 
 export type VectorizersConfigAdd<T> =

src/collections/index.ts

@@ -147,7 +147,7 @@ const collections = (connection: Connection, dbVersionSupport: DbVersionSupport)
           throw new WeaviateUnsupportedFeatureError(supportsNamedVectors.message);
         }
         const configs = config.vectorizers
-          ? makeLegacyVectorizer(config.vectorizers)
+          ? makeLegacyVectorizer({ ...config.vectorizers, name: undefined })
           : {
               vectorizer: undefined,
               moduleConfig: undefined,

src/collections/integration.test.ts

@@ -174,6 +174,20 @@ describe('Testing of the collections.create method', () => {
     expect(response.vectorizers.default.vectorizer.name).toEqual('text2vec-contextionary');
   });
 
+  it('should be able to create a collection with 1 custom named vector', async () => {
+    const collectionName = 'TestCollectionSingleCustomNamedVector';
+    const response = await contextionary.collections
+      .create({
+        name: collectionName,
+        vectorizers: weaviate.configure.vectorizer.none({ name: 'custom' }),
+      })
+      .then(() => contextionary.collections.use(collectionName).config.get());
+    expect(response.name).toEqual(collectionName);
+    expect(response.properties?.length).toEqual(0);
+    expect(response.vectorizers.custom.indexConfig).toBeDefined();
+    expect(response.vectorizers.custom.indexType).toEqual('hnsw');
+  });
+
   it('should be able to create a simple collection without a generic using a schema var', async () => {
     const collectionName = 'TestCollectionSimpleNonGenericVar';
     const schema = {