fix(search_family): Temporary remove the error when a field name does…

… not have the '@' sign at the beginning in the FT.AGGREGATE command (#3956)

src/server/search/search_family.cc

@@ -238,12 +238,15 @@ std::string_view ParseField(CmdArgParser* parser) {
   return field;
 }
 
-std::optional<std::string_view> ParseFieldWithAtSign(CmdArgParser* parser) {
+std::string_view ParseFieldWithAtSign(CmdArgParser* parser) {
   std::string_view field = parser->Next();
   if (field.front() != '@') {
-    return std::nullopt;  // if we expect @, but it's not there, return nullopt
+    // Temporary warning until we can throw an error
+    LOG(WARNING) << "bad arguments: Field name '" << field << "' should start with '@'. '@" << field
+                 << "' is expected";
+  } else {
+    field.remove_prefix(1);  // remove leading @
   }
-  field.remove_prefix(1);  // remove leading @
   return field;
 }
 
@@ -273,12 +276,17 @@ optional<AggregateParams> ParseAggregatorParamsOrReply(CmdArgParser parser,
       vector<string_view> fields(parser.Next<size_t>());
       for (string_view& field : fields) {
         auto parsed_field = ParseFieldWithAtSign(&parser);
+
+        /*
+        TODO: Throw an error if the field has no '@' sign at the beginning
+
         if (!parsed_field) {
           cntx->SendError(absl::StrCat("bad arguments for GROUPBY: Unknown property '", field,
                                        "'. Did you mean '@", field, "`?"));
           return nullopt;
-        }
-        field = parsed_field.value();
+        } */
+
+        field = parsed_field;
       }
 
       vector<aggregate::Reducer> reducers;

src/server/search/search_family_test.cc

@@ -894,6 +894,22 @@ TEST_F(SearchFamilyTest, JsonAggregateGroupBy) {
   EXPECT_THAT(resp, IsUnordArrayWithSize(IsMap("avg_price", "20")));
 }
 
+TEST_F(SearchFamilyTest, JsonAggregateGroupByWithoutAtSign) {
+  Run({"HSET", "h1", "group", "first", "value", "1"});
+  Run({"HSET", "h2", "group", "second", "value", "2"});
+  Run({"HSET", "h3", "group", "first", "value", "3"});
+
+  auto resp =
+      Run({"FT.CREATE", "index", "ON", "HASH", "SCHEMA", "group", "TAG", "value", "NUMERIC"});
+  EXPECT_EQ(resp, "OK");
+
+  // TODO: Throw an error when no '@' is provided in the GROUPBY option
+  resp = Run({"FT.AGGREGATE", "index", "*", "GROUPBY", "1", "group", "REDUCE", "COUNT", "0", "AS",
+              "count"});
+  EXPECT_THAT(resp, IsUnordArrayWithSize(IsMap("count", "2", "group", "first"),
+                                         IsMap("group", "second", "count", "1")));
+}
+
 TEST_F(SearchFamilyTest, AggregateGroupByReduceSort) {
   for (size_t i = 0; i < 101; i++) {  // 51 even, 50 odd
     Run({"hset", absl::StrCat("k", i), "even", (i % 2 == 0) ? "true" : "false", "value",