Fixes #4233: Improve Weaviate error handling (#4239)

* Fixes #4233: Improve Weaviate error handling

* fix tests

Author: vga91

extended-it/src/test/java/apoc/vectordb/WeaviateTest.java

@@ -455,6 +455,19 @@ public void queryReadOnlyVectorsWithMapping() {
         );
     }
 
+    @Test
+    public void queryWithWrongEmbeddingSize() {
+        Map<String, Object> conf = map(ALL_RESULTS_KEY, true,
+                FIELDS_KEY, FIELDS,
+                HEADERS_KEY, READONLY_AUTHORIZATION);
+
+        String expectedErrMsg = "distance between entrypoint and query node: vector lengths don't match: 4 vs 3";
+        
+        assertFails(db, "CALL apoc.vectordb.weaviate.query($host, 'TestCollection', [0.2, 0.1, 0.9], null, 5, $conf)",
+                map("host", HOST, "conf", conf),
+                expectedErrMsg);
+    }
+
     @Test
     public void queryVectorsWithCreateRelWithoutVectorResult() {
 

extended/src/main/java/apoc/vectordb/Weaviate.java

@@ -4,7 +4,9 @@
 import apoc.ml.RestAPIConfig;
 import apoc.result.ListResult;
 import apoc.result.MapResult;
+import apoc.util.CollectionUtils;
 import apoc.util.UrlResolver;
+import org.apache.commons.lang3.StringUtils;
 import org.neo4j.graphdb.GraphDatabaseService;
 import org.neo4j.graphdb.Transaction;
 import org.neo4j.graphdb.security.URLAccessChecker;
@@ -240,7 +242,13 @@ private Stream<EmbeddingResult> queryCommon(String hostOrKey, String collection,
 
         return getEmbeddingResultStream(conf, procedureCallContext, urlAccessChecker, tx,
                 v -> {
-                    Object getValue = ((Map<String, Map>) v).get("data").get("Get");
+                    Map<String, Map> mapResult = (Map<String, Map>) v;
+                    List<Map> errors = (List<Map>) mapResult.get("errors");
+                    if ( CollectionUtils.isNotEmpty(errors) ) {
+                        String message = "An error occurred during Weaviate API response: \n" + StringUtils.join(errors, "\n");
+                        throw new RuntimeException(message);
+                    }
+                    Object getValue = mapResult.get("data").get("Get");
                     Object collectionValue = ((Map) getValue).get(collection);
                     return ((List<Map>) collectionValue).stream()
                             .map(i -> {