Save cached model structs globally

main.go

@@ -23,7 +23,6 @@ type DB struct {
 	Value             interface{}
 	Error             error
 	RowsAffected      int64
-	ModelStructs      map[reflect.Type]*ModelStruct
 	callback          *callback
 	db                sqlCommon
 	parent            *DB
@@ -63,13 +62,12 @@ func Open(dialect string, args ...interface{}) (DB, error) {
 		}
 
 		db = DB{
-			dialect:      NewDialect(dialect),
-			logger:       defaultLogger,
-			callback:     DefaultCallback,
-			source:       source,
-			values:       map[string]interface{}{},
-			db:           dbSql,
-			ModelStructs: map[reflect.Type]*ModelStruct{},
+			dialect:  NewDialect(dialect),
+			logger:   defaultLogger,
+			callback: DefaultCallback,
+			source:   source,
+			values:   map[string]interface{}{},
+			db:       dbSql,
 		}
 		db.parent = &db
 	}
@@ -125,7 +123,7 @@ func (s *DB) LogMode(enable bool) *DB {
 }
 
 func (s *DB) SingularTable(enable bool) {
-	s.parent.ModelStructs = map[reflect.Type]*ModelStruct{}
+	modelStructs = map[reflect.Type]*ModelStruct{}
 	s.parent.singularTable = enable
 }
 

model_struct.go

@@ -11,6 +11,8 @@ import (
 	"time"
 )
 
+var modelStructs = map[reflect.Type]*ModelStruct{}
+
 type ModelStruct struct {
 	PrimaryFields []*StructField
 	StructFields  []*StructField
@@ -82,10 +84,8 @@ func (scope *Scope) GetModelStruct() *ModelStruct {
 		scopeType = scopeType.Elem()
 	}
 
-	if scope.db != nil {
-		if value, ok := scope.db.parent.ModelStructs[scopeType]; ok {
-			return value
-		}
+	if value, ok := modelStructs[scopeType]; ok {
+		return value
 	}
 
 	modelStruct.ModelType = scopeType
@@ -284,9 +284,7 @@ func (scope *Scope) GetModelStruct() *ModelStruct {
 		modelStruct.StructFields = append(modelStruct.StructFields, field)
 	}
 
-	if scope.db != nil {
-		scope.db.parent.ModelStructs[scopeType] = &modelStruct
-	}
+	modelStructs[scopeType] = &modelStruct
 
 	return &modelStruct
 }