fix(config): read 'none' vector as its own index type

.github/workflows/test.yaml

@@ -92,7 +92,7 @@ jobs:
       fail-fast: false
       matrix:
         WEAVIATE_VERSION:
-          ["1.32.24", "1.33.11", "1.34.7", "1.35.2", "1.36.9", "1.37.0-rc.0"]
+          ["1.32.24", "1.33.11", "1.34.7", "1.35.2", "1.36.9", "1.37.0-rc.1"]
     steps:
       - uses: actions/checkout@v4
 

src/it/java/io/weaviate/containers/Weaviate.java

@@ -45,7 +45,7 @@ public enum Version {
     V134(1, 34, 7),
     V135(1, 35, 2),
     V136(1, 36, 9),
-    V137(1, 37, "0-rc.0");
+    V137(1, 37, "0-rc.1");
 
     public final SemanticVersion semver;
 

src/it/java/io/weaviate/integration/CollectionsITest.java

@@ -20,6 +20,7 @@
 import io.weaviate.client6.v1.api.collections.Replication;
 import io.weaviate.client6.v1.api.collections.Replication.AsyncReplicationConfig;
 import io.weaviate.client6.v1.api.collections.VectorConfig;
+import io.weaviate.client6.v1.api.collections.VectorIndex;
 import io.weaviate.client6.v1.api.collections.config.PropertyIndexType;
 import io.weaviate.client6.v1.api.collections.config.Shard;
 import io.weaviate.client6.v1.api.collections.config.ShardStatus;
@@ -394,7 +395,8 @@ public void test_dropVectorIndex() throws IOException {
         .extracting(CollectionConfig::vectors, InstanceOfAssertFactories.map(String.class, VectorConfig.class))
         .hasSize(2)
         .extractingByKey("dropme")
-        .returns(null, VectorConfig::vectorIndex); // A dropped index has not vectorIndex configuration.
+        .extracting(VectorConfig::vectorIndex)
+        .matches(VectorIndex::isNone).as("is 'none'");
   }
 
   @Test

src/main/java/io/weaviate/client6/v1/api/collections/VectorIndex.java

@@ -5,6 +5,7 @@
 import java.util.Map;
 
 import com.google.gson.Gson;
+import com.google.gson.JsonObject;
 import com.google.gson.JsonParser;
 import com.google.gson.TypeAdapter;
 import com.google.gson.TypeAdapterFactory;
@@ -17,6 +18,7 @@
 import io.weaviate.client6.v1.api.collections.vectorindex.Flat;
 import io.weaviate.client6.v1.api.collections.vectorindex.HFresh;
 import io.weaviate.client6.v1.api.collections.vectorindex.Hnsw;
+import io.weaviate.client6.v1.api.collections.vectorindex.None;
 import io.weaviate.client6.v1.internal.TaggedUnion;
 import io.weaviate.client6.v1.internal.json.JsonEnum;
 
@@ -28,7 +30,8 @@ enum Kind implements JsonEnum<Kind> {
     HNSW("hnsw"),
     FLAT("flat"),
     DYNAMIC("dynamic"),
-    HFRESH("hfresh");
+    HFRESH("hfresh"),
+    NONE("none");
 
     private static final Map<String, Kind> jsonValueMap = JsonEnum.collectNames(Kind.values());
     private final String jsonValue;
@@ -87,6 +90,11 @@ default HFresh asHFresh() {
     return _as(VectorIndex.Kind.HFRESH);
   }
 
+  /** Is this a "none" vector index? */
+  default boolean isNone() {
+    return _is(VectorIndex.Kind.NONE);
+  }
+
   static enum CustomTypeAdapterFactory implements TypeAdapterFactory {
     INSTANCE;
 
@@ -102,6 +110,7 @@ private final void init(Gson gson) {
       addAdapter(gson, VectorIndex.Kind.FLAT, Flat.class);
       addAdapter(gson, VectorIndex.Kind.DYNAMIC, Dynamic.class);
       addAdapter(gson, VectorIndex.Kind.HFRESH, HFresh.class);
+      addAdapter(gson, VectorIndex.Kind.NONE, None.class);
     }
 
     @SuppressWarnings("unchecked")
@@ -148,7 +157,7 @@ public VectorIndex read(JsonReader in) throws IOException {
           if (vectorIndexConfig == null || vectorIndexConfig.isJsonNull()) {
             // VectorConfig.CustomTypeAdapterFactory cannot provide this
             // value for vector indexes that have been dropped.
-            return null;
+            vectorIndexConfig = new JsonObject();
           }
 
           VectorIndex.Kind kind;

src/main/java/io/weaviate/client6/v1/api/collections/vectorindex/None.java

@@ -0,0 +1,15 @@
+package io.weaviate.client6.v1.api.collections.vectorindex;
+
+import io.weaviate.client6.v1.api.collections.VectorIndex;
+
+public record None() implements VectorIndex {
+  @Override
+  public VectorIndex.Kind _kind() {
+    return VectorIndex.Kind.NONE;
+  }
+
+  @Override
+  public Object _self() {
+    return this;
+  }
+}