fix(GRAPHQL): Added support for exact index on field having @id directive.

graphql/schema/gqlschema.go

@@ -1648,20 +1648,23 @@ func addHashIfRequired(fld *ast.FieldDefinition, indexes []string) []string {
 	id := fld.Directives.ForName(idDirective)
 	if id != nil {
 		// If @id directive is applied along with @search, we check if the search has hash as an
-		// arg. If it doesn't, then we add it.
-		containsHash := false
-		for _, index := range indexes {
-			if index == "hash" {
-				containsHash = true
-			}
-		}
-		if !containsHash {
+		// arg. If it doesn't and there is no exact arg, then we add hash in it.
+		if !hasIndex(indexes, "hash") && !hasIndex(indexes, "exact") {
 			indexes = append(indexes, "hash")
 		}
 	}
 	return indexes
 }
 
+func hasIndex(indexes []string, index string) bool {
+	for i := range indexes {
+		if indexes[i] == index {
+			return true
+		}
+	}
+	return false
+}
+
 func getDefaultSearchIndex(fldName string) string {
 	if search, ok := defaultSearches[fldName]; ok {
 		return search

graphql/schema/gqlschema_test.yml

@@ -2838,6 +2838,12 @@ valid_schemas:
         f2: String! @id
       }
 
+  - name: "field with @id directive can have exact index"
+    input: |
+      type X {
+        f1: String! @id @search(by:[exact])
+      }
+
   - name: "Type implements from two interfaces where both have ID"
     input: |
       interface X {

graphql/schema/schemagen.go

@@ -637,6 +637,16 @@ func genDgSchema(gqlSch *ast.Schema, definitions []string) string {
 					var indexes []string
 					upsertStr := ""
 					search := f.Directives.ForName(searchDirective)
+					if search != nil {
+						arg := search.Arguments.ForName(searchArgs)
+						if arg != nil {
+							indexes = append(indexes, getAllSearchIndexes(arg.Value)...)
+						} else {
+							indexes = append(indexes, supportedSearches[defaultSearches[f.Type.
+								Name()]].dgIndex)
+						}
+					}
+
 					id := f.Directives.ForName(idDirective)
 					if id != nil || f.Type.Name() == "ID" {
 						upsertStr = "@upsert "
@@ -646,17 +656,9 @@ func genDgSchema(gqlSch *ast.Schema, definitions []string) string {
 						case "Float":
 							indexes = append(indexes, "float")
 						case "String", "ID":
-							indexes = append(indexes, "hash")
-						}
-					}
-
-					if search != nil {
-						arg := search.Arguments.ForName(searchArgs)
-						if arg != nil {
-							indexes = append(indexes, getAllSearchIndexes(arg.Value)...)
-						} else {
-							indexes = append(indexes, supportedSearches[defaultSearches[f.Type.
-								Name()]].dgIndex)
+							if !hasIndex(indexes, "exact") {
+								indexes = append(indexes, "hash")
+							}
 						}
 					}
 

graphql/schema/testdata/schemagen/input/exact-index-on-id-field.graphql

@@ -0,0 +1,4 @@
+# This will add exact index on content field, overwriting the default "hash" index for field of type "String! @id".
+type Post {
+    content: String! @id @search(by:[exact])
+}