From d34abe91287ceed279a1e1017ff5fbd3bd3592c7 Mon Sep 17 00:00:00 2001
From: zhtiyissr <bbqezhang@qq.com>
Date: Sun, 8 Oct 2023 23:33:38 +0800
Subject: [PATCH] feat: add IF NOT EXISTS config for migrator

---
 migrator/migrator.go | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/migrator/migrator.go b/migrator/migrator.go
index b15a43ef..667d496e 100644
--- a/migrator/migrator.go
+++ b/migrator/migrator.go
@@ -35,6 +35,7 @@ type Migrator struct {
 // Config schema config
 type Config struct {
 	CreateIndexAfterCreateTable bool
+	CreateTableUseIfNotExists   bool
 	DB                          *gorm.DB
 	gorm.Dialector
 }
@@ -213,6 +214,10 @@ func (m Migrator) CreateTable(values ...interface{}) error {
 				hasPrimaryKeyInDataType bool
 			)
 
+			if m.CreateTableUseIfNotExists {
+				createTableSQL = "CREATE TABLE IF NOT EXISTS ? ("
+			}
+
 			for _, dbName := range stmt.Schema.DBNames {
 				field := stmt.Schema.FieldsByDBName[dbName]
 				if !field.IgnoreMigration {