<- 不创建数据库字段

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)

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)

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 {
+		if !col.Creatable() { // ignore <- tag column
-			sql += col.String(b.dialect)
+			continue
-		} else {*/
+		}
 		s, _ := ColumnString(db, col, false)
 		sql += s
 		// }

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)

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)

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))