Allow negative number for limit

clause/limit.go

@@ -33,10 +33,8 @@ func (limit Limit) MergeClause(clause *Clause) {
 	clause.Name = ""
 
 	if v, ok := clause.Expression.(Limit); ok {
-		if limit.Limit == 0 && v.Limit > 0 {
+		if limit.Limit == 0 && v.Limit != 0 {
 			limit.Limit = v.Limit
-		} else if limit.Limit < 0 {
-			limit.Limit = 0
 		}
 
 		if limit.Offset == 0 && v.Offset > 0 {

tests/go.mod

@@ -8,7 +8,7 @@ require (
 	github.com/lib/pq v1.6.0
 	gorm.io/driver/mysql v1.0.1
 	gorm.io/driver/postgres v1.0.0
-	gorm.io/driver/sqlite v1.1.1
+	gorm.io/driver/sqlite v1.1.2
 	gorm.io/driver/sqlserver v1.0.4
 	gorm.io/gorm v1.20.0
 )

tests/query_test.go

@@ -625,6 +625,7 @@ func TestLimit(t *testing.T) {
 		{Name: "LimitUser3", Age: 20},
 		{Name: "LimitUser4", Age: 10},
 		{Name: "LimitUser5", Age: 20},
+		{Name: "LimitUser6", Age: 20},
 	}
 
 	DB.Create(&users)
@@ -633,7 +634,7 @@ func TestLimit(t *testing.T) {
 	DB.Order("age desc").Limit(3).Find(&users1).Limit(5).Find(&users2).Limit(-1).Find(&users3)
 
 	if len(users1) != 3 || len(users2) != 5 || len(users3) <= 5 {
-		t.Errorf("Limit should works")
+		t.Errorf("Limit should works, users1 %v users2 %v users3 %v", len(users1), len(users2), len(users3))
 	}
 }