如果查询了 total 字段

api/graphql.go

@@ -83,6 +83,16 @@ func generateGraphQLType(model interface{}) (*graphql.Object, error) {
 	}), nil
 }
 
+// 判断指定字段是否存在
+func existField(selections []ast.Selection, name string) bool {
+	for _, field := range selections {
+		if f, ok := field.(*ast.Field); ok && f.Name.Value == name {
+			return true
+		}
+	}
+	return false
+}
+
 func NewSchema(config Config) (graphql.Schema, error) {
 
 	if db, err = gorm.Open(mysql.Open(fmt.Sprintf(
@@ -571,11 +581,9 @@ func NewSchema(config Config) (graphql.Schema, error) {
 				}
 
 				// 如果查询了 total 字段
-				if p.Info.FieldASTs[0].SelectionSet.Selections[1] != nil {
+				if existField(p.Info.FieldASTs[0].SelectionSet.Selections, "total") {
 					sql, _, _ := query.ToSQL()
-					fmt.Println(sql)
 					sql = strings.Replace(sql, "SELECT *", "SELECT COUNT(*)", 1)
-					fmt.Println(sql)
 					if err := db.Raw(sql).Scan(&total).Error; err != nil {
 						return nil, err
 					}
@@ -1181,15 +1189,7 @@ func NewSchema(config Config) (graphql.Schema, error) {
 					}
 				}
 
-				existField := func(selections []ast.Selection, name string) bool {
-					for _, field := range selections {
-						if f, ok := field.(*ast.Field); ok && f.Name.Value == name {
-							return true
-						}
-					}
-					return false
-				}
-
+				// 如果查询了 total 字段
 				if existField(p.Info.FieldASTs[0].SelectionSet.Selections, "total") {
 					sql, _, _ := query.ToSQL()
 					sql = strings.Replace(sql, "SELECT *", "SELECT COUNT(*)", 1)