names/table_name.go

@@ -6,6 +6,7 @@ package names
 
 import (
 	"reflect"
+	"sync"
 )
 
 // TableName table name interface to define customerize table name
@@ -15,23 +16,40 @@ type TableName interface {
 
 var (
 	tpTableName = reflect.TypeOf((*TableName)(nil)).Elem()
+	tvCache     sync.Map
 )
 
 func GetTableName(mapper Mapper, v reflect.Value) string {
-	if t, ok := v.Interface().(TableName); ok {
-		return t.TableName()
-	}
 	if v.Type().Implements(tpTableName) {
 		return v.Interface().(TableName).TableName()
 	}
+
 	if v.Kind() == reflect.Ptr {
 		v = v.Elem()
-		if t, ok := v.Interface().(TableName); ok {
-			return t.TableName()
-		}
 		if v.Type().Implements(tpTableName) {
 			return v.Interface().(TableName).TableName()
 		}
+	} else if v.CanAddr() {
+		v1 := v.Addr()
+		if v1.Type().Implements(tpTableName) {
+			return v1.Interface().(TableName).TableName()
+		}
+	} else {
+		name, ok := tvCache.Load(v.Type())
+		if ok {
+			if name.(string) != "" {
+				return name.(string)
+			}
+		} else {
+			v2 := reflect.New(v.Type())
+			if v2.Type().Implements(tpTableName) {
+				tableName := v2.Interface().(TableName).TableName()
+				tvCache.Store(v.Type(), tableName)
+				return tableName
+			}
+
+			tvCache.Store(v.Type(), "")
+		}
 	}
 
 	return mapper.Obj2Table(v.Type().Name())

names/table_name_test.go

@@ -5,6 +5,7 @@
 package names
 
 import (
+	"fmt"
 	"reflect"
 	"testing"
 	"time"
@@ -43,8 +44,10 @@ func (MyGetCustomTableImpletation) TableName() string {
 
 type TestTableNameStruct struct{}
 
+const getTestTableName = "my_test_table_name_struct"
+
 func (t *TestTableNameStruct) TableName() string {
-	return "my_test_table_name_struct"
+	return getTestTableName
 }
 
 func TestGetTableName(t *testing.T) {
@@ -85,13 +88,18 @@ func TestGetTableName(t *testing.T) {
 		},
 		{
 			SnakeMapper{},
-			reflect.ValueOf(MyGetCustomTableImpletation{}),
-			getCustomTableName,
+			reflect.ValueOf(new(TestTableNameStruct)),
+			new(TestTableNameStruct).TableName(),
 		},
 		{
 			SnakeMapper{},
 			reflect.ValueOf(new(TestTableNameStruct)),
-			new(TestTableNameStruct).TableName(),
+			getTestTableName,
+		},
+		{
+			SnakeMapper{},
+			reflect.ValueOf(TestTableNameStruct{}),
+			getTestTableName,
 		},
 	}
 
@@ -99,3 +107,34 @@ func TestGetTableName(t *testing.T) {
 		assert.EqualValues(t, kase.expectedTableName, GetTableName(kase.mapper, kase.v))
 	}
 }
+
+type OAuth2Application struct {
+}
+
+// TableName sets the table name to `oauth2_application`
+func (app *OAuth2Application) TableName() string {
+	return "oauth2_application"
+}
+
+func TestGonicMapperCustomTable(t *testing.T) {
+	assert.EqualValues(t, "oauth2_application",
+		GetTableName(LintGonicMapper, reflect.ValueOf(new(OAuth2Application))))
+	assert.EqualValues(t, "oauth2_application",
+		GetTableName(LintGonicMapper, reflect.ValueOf(OAuth2Application{})))
+}
+
+type MyTable struct {
+	Idx int
+}
+
+func (t *MyTable) TableName() string {
+	return fmt.Sprintf("mytable_%d", t.Idx)
+}
+
+func TestMyTable(t *testing.T) {
+	var table MyTable
+	for i := 0; i < 10; i++ {
+		table.Idx = i
+		assert.EqualValues(t, fmt.Sprintf("mytable_%d", i), GetTableName(SameMapper{}, reflect.ValueOf(&table)))
+	}
+}