GT-344 Fetching single InvertedIndex fails with Marshalling error (#468)

Author: jwierzbo

CHANGELOG.md

@@ -5,6 +5,7 @@
 - Add `IsExternalStorageError` to check for [external storage errors](https://www.arangodb.com/docs/stable/appendix-error-codes.html#external-arangodb-storage-errors)
 - `nested` field in arangosearch type View
 - Fix: TTL index creation fails when expireAt is 0
+- Fix: Fetching single InvertedIndex fails with Marshalling error
 
 ## [1.4.1](https://github.com/arangodb/go-driver/tree/v1.4.1) (2022-12-14)
 - Add support for `checksum` in Collections

collection_indexes_impl.go

@@ -73,11 +73,17 @@ func (c *collection) Index(ctx context.Context, name string) (Index, error) {
 	if err := resp.CheckStatus(200); err != nil {
 		return nil, WithStack(err)
 	}
-	var data indexData
+	var data map[string]interface{}
 	if err := resp.ParseBody("", &data); err != nil {
 		return nil, WithStack(err)
 	}
-	idx, err := newIndex(data, c)
+
+	rawResponse, err := json.Marshal(data)
+	if err != nil {
+		return nil, WithStack(err)
+	}
+
+	idx, err := newIndexFromMap(rawResponse, c)
 	if err != nil {
 		return nil, WithStack(err)
 	}

test/index_ensure_test.go

@@ -590,28 +590,24 @@ func TestEnsureInvertedIndex(t *testing.T) {
 				skipNoEnterprise(t)
 			}
 
+			requireIdxEquality := func(invertedIdx driver.Index) {
+				require.Equal(t, driver.InvertedIndex, invertedIdx.Type())
+				require.Equal(t, tc.Options.Name, invertedIdx.UserName())
+				require.Equal(t, tc.Options.PrimarySort, invertedIdx.InvertedIndexOptions().PrimarySort)
+				require.Equal(t, tc.Options.Fields, invertedIdx.InvertedIndexOptions().Fields)
+			}
+
 			idx, created, err := col.EnsureInvertedIndex(ctx, &tc.Options)
 			require.NoError(t, err)
 			require.True(t, created)
-
-			tc.Options.IsNewlyCreated = true
-			tc.Options.Analyzer = string(driver.ArangoSearchAnalyzerTypeIdentity) // default value for analyzer
-
-			requireIdxEquality := func(invertedIdx driver.Index) {
-				require.Equal(t, driver.InvertedIndex, idx.Type())
-				require.Equal(t, tc.Options.Name, idx.UserName())
-				require.Equal(t, tc.Options.PrimarySort, idx.InvertedIndexOptions().PrimarySort)
-				require.Equal(t, tc.Options.Fields, idx.InvertedIndexOptions().Fields)
-			}
 			requireIdxEquality(idx)
 
-			indexes, err := col.Indexes(ctx)
+			col.Indexes(ctx)
+			idx, err = col.Index(ctx, tc.Options.Name)
 			require.NoError(t, err)
-			require.NotEmpty(t, indexes)
-
-			requireIdxEquality(indexes[0])
+			requireIdxEquality(idx)
 
-			err = idx.Remove(nil)
+			err = idx.Remove(ctx)
 			require.NoError(t, err)
 		})
 	}