fix: db can't reuse

Signed-off-by: tangyang9464 <tangyang9464@163.com>

adapter.go

@@ -15,6 +15,7 @@
 package gormadapter
 
 import (
+	"context"
 	"errors"
 	"fmt"
 	"runtime"
@@ -251,18 +252,30 @@ func NewAdapterByDB(db *gorm.DB) (*Adapter, error) {
 }
 
 func TurnOffAutoMigrate(db *gorm.DB) {
-	*db = *db.Set(disableMigrateKey, false)
+	ctx := db.Statement.Context
+	if ctx == nil {
+		ctx = context.Background()
+	}
+
+	ctx = context.WithValue(ctx, disableMigrateKey, false)
+
+	*db = *db.WithContext(ctx)
 }
 
 func NewAdapterByDBWithCustomTable(db *gorm.DB, t interface{}, tableName ...string) (*Adapter, error) {
-	*db = *db.Set(customTableKey, t)
+	ctx := db.Statement.Context
+	if ctx == nil {
+		ctx = context.Background()
+	}
+
+	ctx = context.WithValue(ctx, customTableKey, t)
 
 	curTableName := defaultTableName
 	if len(tableName) > 0 {
 		curTableName = tableName[0]
 	}
 
-	return NewAdapterByDBUseTableName(db, "", curTableName)
+	return NewAdapterByDBUseTableName(db.WithContext(ctx), "", curTableName)
 }
 
 func openDBConnection(driverName, dataSourceName string) (*gorm.DB, error) {
@@ -366,14 +379,14 @@ func (a *Adapter) casbinRuleTable() func(db *gorm.DB) *gorm.DB {
 }
 
 func (a *Adapter) createTable() error {
-	disableMigrate, ok := a.db.Get(disableMigrateKey)
-	if ok && disableMigrate != nil {
+	disableMigrate := a.db.Statement.Context.Value(disableMigrateKey)
+	if disableMigrate != nil {
 		return nil
 	}
 
-	t, ok := a.db.Get(customTableKey)
+	t := a.db.Statement.Context.Value(customTableKey)
 
-	if ok && t != nil {
+	if t != nil {
 		return a.db.AutoMigrate(t)
 	}
 
@@ -394,9 +407,8 @@ func (a *Adapter) createTable() error {
 }
 
 func (a *Adapter) dropTable() error {
-	t, ok := a.db.Get(customTableKey)
-
-	if !ok || t == nil {
+	t := a.db.Statement.Context.Value(customTableKey)
+	if t == nil {
 		return a.db.Migrator().DropTable(a.getTableInstance())
 	}