Test customize data type for primary key

query_test.go

@@ -87,6 +87,37 @@ func TestUIntPrimaryKey(t *testing.T) {
 	}
 }
 
+func TestCustomizedTypePrimaryKey(t *testing.T) {
+	type ID uint
+	type CustomizedTypePrimaryKey struct {
+		ID   ID
+		Name string
+	}
+
+	DB.AutoMigrate(&CustomizedTypePrimaryKey{})
+
+	p1 := CustomizedTypePrimaryKey{Name: "p1"}
+	p2 := CustomizedTypePrimaryKey{Name: "p2"}
+	p3 := CustomizedTypePrimaryKey{Name: "p3"}
+	DB.Create(&p1)
+	DB.Create(&p2)
+	DB.Create(&p3)
+
+	var p CustomizedTypePrimaryKey
+
+	if err := DB.First(&p, p2.ID).Error; err == nil {
+		t.Errorf("Should return error for invalid query condition")
+	}
+
+	if err := DB.First(&p, "id = ?", p2.ID).Error; err != nil {
+		t.Errorf("No error should happen when querying with customized type for primary key, got err %v", err)
+	}
+
+	if p.Name != "p2" {
+		t.Errorf("Should find correct value when querying with customized type for primary key")
+	}
+}
+
 func TestStringPrimaryKeyForNumericValueStartingWithZero(t *testing.T) {
 	type AddressByZipCode struct {
 		ZipCode string `gorm:"primary_key"`

scope.go

@@ -578,12 +578,21 @@ func (scope *Scope) buildCondition(clause map[string]interface{}, include bool)
 	case interface{}:
 		var sqls []string
 		newScope := scope.New(value)
+
+		if len(newScope.Fields()) == 0 {
+			scope.Err(fmt.Errorf("invalid query condition: %v", value))
+			return
+		}
+
 		for _, field := range newScope.Fields() {
 			if !field.IsIgnored && !field.IsBlank {
 				sqls = append(sqls, fmt.Sprintf("(%v.%v %s %v)", quotedTableName, scope.Quote(field.DBName), equalSQL, scope.AddToVars(field.Field.Interface())))
 			}
 		}
 		return strings.Join(sqls, " AND ")
+	default:
+		scope.Err(fmt.Errorf("invalid query condition: %v", value))
+		return
 	}
 
 	replacements := []string{}