use limit when limitoffset is zero (#3275)

Author: ndyakov

search_commands.go

@@ -567,11 +567,8 @@ func FTAggregateQuery(query string, options *FTAggregateOptions) AggregateQuery
 		if options.SortByMax > 0 {
 			queryArgs = append(queryArgs, "MAX", options.SortByMax)
 		}
-		if options.LimitOffset > 0 {
-			queryArgs = append(queryArgs, "LIMIT", options.LimitOffset)
-		}
-		if options.Limit > 0 {
-			queryArgs = append(queryArgs, options.Limit)
+		if options.LimitOffset >= 0 && options.Limit > 0 {
+			queryArgs = append(queryArgs, "LIMIT", options.LimitOffset, options.Limit)
 		}
 		if options.Filter != "" {
 			queryArgs = append(queryArgs, "FILTER", options.Filter)
@@ -766,11 +763,8 @@ func (c cmdable) FTAggregateWithArgs(ctx context.Context, index string, query st
 		if options.SortByMax > 0 {
 			args = append(args, "MAX", options.SortByMax)
 		}
-		if options.LimitOffset > 0 {
-			args = append(args, "LIMIT", options.LimitOffset)
-		}
-		if options.Limit > 0 {
-			args = append(args, options.Limit)
+		if options.LimitOffset >= 0 && options.Limit > 0 {
+			args = append(args, "LIMIT", options.LimitOffset, options.Limit)
 		}
 		if options.Filter != "" {
 			args = append(args, "FILTER", options.Filter)

search_test.go

@@ -570,6 +570,11 @@ var _ = Describe("RediSearch commands Resp 2", Label("search"), func() {
 		res, err = client.FTAggregateWithArgs(ctx, "idx1", "*", options).Result()
 		Expect(err).NotTo(HaveOccurred())
 		Expect(res.Rows[0].Fields["t1"]).To(BeEquivalentTo("b"))
+
+		options = &redis.FTAggregateOptions{SortBy: []redis.FTAggregateSortBy{{FieldName: "@t1"}}, Limit: 1, LimitOffset: 0}
+		res, err = client.FTAggregateWithArgs(ctx, "idx1", "*", options).Result()
+		Expect(err).NotTo(HaveOccurred())
+		Expect(res.Rows[0].Fields["t1"]).To(BeEquivalentTo("a"))
 	})
 
 	It("should FTAggregate load ", Label("search", "ftaggregate"), func() {