From 237572ff640de70fcf5130f17698c748608d26ce Mon Sep 17 00:00:00 2001
From: Cr <631807682@qq.com>
Date: Mon, 4 Jul 2022 14:03:29 +0800
Subject: [PATCH] fix: handle database type array (#115)

* fix: handle database type array

* chore: code comment
---
 migrator.go | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/migrator.go b/migrator.go
index 210c2cb..5eb0acc 100644
--- a/migrator.go
+++ b/migrator.go
@@ -478,6 +478,12 @@ func (m Migrator) ColumnTypes(value interface{}) (columnTypes []gorm.ColumnType,
 					mc := c.(*migrator.ColumnType)
 					if mc.NameValue.String == name {
 						mc.ColumnTypeValue = sql.NullString{String: dataType, Valid: true}
+						// Handle array type: _text -> text[] , _int4 -> integer[]
+						// Not support array size limits and array size limits because:
+						// https://www.postgresql.org/docs/current/arrays.html#ARRAYS-DECLARATION
+						if strings.HasPrefix(mc.DataTypeValue.String, "_") {
+							mc.DataTypeValue = sql.NullString{String: dataType, Valid: true}
+						}
 						break
 					}
 				}