From 2fd18aa1b3a31d96425dfc309bf316dde1453491 Mon Sep 17 00:00:00 2001
From: Lunny Xiao <xiaolunwen@gmail.com>
Date: Wed, 4 Aug 2021 13:16:13 +0800
Subject: [PATCH] =?UTF-8?q?<-=20=E4=B8=8D=E5=88=9B=E5=BB=BA=E6=95=B0?=
 =?UTF-8?q?=E6=8D=AE=E5=BA=93=E5=AD=97=E6=AE=B5?=
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---
 dialects/mssql.go    | 3 +++
 dialects/mysql.go    | 3 +++
 dialects/oracle.go   | 6 +++---
 dialects/postgres.go | 4 ++++
 dialects/sqlite3.go  | 4 ++++
 schemas/column.go    | 5 +++++
 6 files changed, 22 insertions(+), 3 deletions(-)

diff --git a/dialects/mssql.go b/dialects/mssql.go
index 0eeb1bcd..f5c7d893 100644
--- a/dialects/mssql.go
+++ b/dialects/mssql.go
@@ -629,6 +629,9 @@ func (db *mssql) CreateTableSQL(table *schemas.Table, tableName string) ([]strin
 
 	for _, colName := range table.ColumnsSeq() {
 		col := table.GetColumn(colName)
+		if !col.Creatable() { // ignore <- tag column
+			continue
+		}
 		s, _ := ColumnString(db, col, col.IsPrimaryKey && len(pkList) == 1)
 		sql += s
 		sql = strings.TrimSpace(sql)
diff --git a/dialects/mysql.go b/dialects/mysql.go
index 21128527..551777b2 100644
--- a/dialects/mysql.go
+++ b/dialects/mysql.go
@@ -641,6 +641,9 @@ func (db *mysql) CreateTableSQL(table *schemas.Table, tableName string) ([]strin
 
 		for _, colName := range table.ColumnsSeq() {
 			col := table.GetColumn(colName)
+			if !col.Creatable() { // ignore <- tag column
+				continue
+			}
 			s, _ := ColumnString(db, col, col.IsPrimaryKey && len(pkList) == 1)
 			sql += s
 			sql = strings.TrimSpace(sql)
diff --git a/dialects/oracle.go b/dialects/oracle.go
index 11a6653b..00a66aab 100644
--- a/dialects/oracle.go
+++ b/dialects/oracle.go
@@ -612,9 +612,9 @@ func (db *oracle) CreateTableSQL(table *schemas.Table, tableName string) ([]stri
 
 	for _, colName := range table.ColumnsSeq() {
 		col := table.GetColumn(colName)
-		/*if col.IsPrimaryKey && len(pkList) == 1 {
-			sql += col.String(b.dialect)
-		} else {*/
+		if !col.Creatable() { // ignore <- tag column
+			continue
+		}
 		s, _ := ColumnString(db, col, false)
 		sql += s
 		// }
diff --git a/dialects/postgres.go b/dialects/postgres.go
index 96ebfc85..5485ad3e 100644
--- a/dialects/postgres.go
+++ b/dialects/postgres.go
@@ -981,6 +981,10 @@ func (db *postgres) CreateTableSQL(table *schemas.Table, tableName string) ([]st
 
 		for _, colName := range table.ColumnsSeq() {
 			col := table.GetColumn(colName)
+			if !col.Creatable() { // ignore <- tag column
+				continue
+			}
+
 			s, _ := ColumnString(db, col, col.IsPrimaryKey && len(pkList) == 1)
 			sql += s
 			sql = strings.TrimSpace(sql)
diff --git a/dialects/sqlite3.go b/dialects/sqlite3.go
index ac17fd92..1c586abe 100644
--- a/dialects/sqlite3.go
+++ b/dialects/sqlite3.go
@@ -301,6 +301,10 @@ func (db *sqlite3) CreateTableSQL(table *schemas.Table, tableName string) ([]str
 
 		for _, colName := range table.ColumnsSeq() {
 			col := table.GetColumn(colName)
+			if !col.Creatable() { // ignore <- tag column
+				continue
+			}
+
 			s, _ := ColumnString(db, col, col.IsPrimaryKey && len(pkList) == 1)
 			sql += s
 			sql = strings.TrimSpace(sql)
diff --git a/schemas/column.go b/schemas/column.go
index 4bbb6c2d..25a69034 100644
--- a/schemas/column.go
+++ b/schemas/column.go
@@ -74,6 +74,11 @@ func NewColumn(name, fieldName string, sqlType SQLType, len1, len2 int, nullable
 	}
 }
 
+// Creatable returns true if the column needs to be created when sync
+func (col *Column) Creatable() bool {
+	return col.MapType != ONLYFROMDB
+}
+
 // ValueOf returns column's filed of struct's value
 func (col *Column) ValueOf(bean interface{}) (*reflect.Value, error) {
 	dataStruct := reflect.Indirect(reflect.ValueOf(bean))