Fix/bun handlers (#9)

* BeforeInsert and BeforeUpdate hooks replaced with BeforeAppendModel hook

* Rollback imports

* Added BeforeAppendModelHook interface check

internal/storage/token_metadata.go

@@ -45,17 +45,18 @@ func (TokenMetadata) TableName() string {
 	return "token_metadata"
 }
 
-// BeforeInsert -
-func (tm *TokenMetadata) BeforeInsert(ctx context.Context) (context.Context, error) {
-	tm.UpdatedAt = time.Now().Unix()
-	tm.CreatedAt = tm.UpdatedAt
-	tm.UpdateID = TokenUpdateID.Increment()
-	return ctx, nil
-}
-
-// BeforeUpdate -
-func (tm *TokenMetadata) BeforeUpdate(ctx context.Context) (context.Context, error) {
-	tm.UpdatedAt = time.Now().Unix()
-	tm.UpdateID = TokenUpdateID.Increment()
-	return ctx, nil
+var _ bun.BeforeAppendModelHook = (*TokenMetadata)(nil)
+
+// BeforeAppendModel -
+func (tm *TokenMetadata) BeforeAppendModel(ctx context.Context, query bun.Query) error {
+	switch query.(type) {
+	case *bun.InsertQuery:
+		tm.UpdatedAt = time.Now().Unix()
+		tm.CreatedAt = tm.UpdatedAt
+		tm.UpdateID = TokenUpdateID.Increment()
+	case *bun.UpdateQuery:
+		tm.UpdatedAt = time.Now().Unix()
+		tm.UpdateID = TokenUpdateID.Increment()
+	}
+	return nil
 }