orm set relation column name #259

@@ -150,7 +150,7 @@ func NewTag() *Tag {
 
 type Comment struct {
 	Id      int
-	Post    *Post     `orm:"rel(fk)"`
+	Post    *Post     `orm:"rel(fk);column(post)"`
 	Content string    `orm:"type(text)"`
 	Parent  *Comment  `orm:"null;rel(fk)"`
 	Created time.Time `orm:"auto_now_add"`

@@ -73,13 +73,16 @@ func getTableUnique(val reflect.Value) [][]string {
 }
 
 func getColumnName(ft int, addrField reflect.Value, sf reflect.StructField, col string) string {
-	column := strings.ToLower(col)
-	if column == "" {
+	col = strings.ToLower(col)
+	column := col
+	if col == "" {
 		column = snakeString(sf.Name)
 	}
 	switch ft {
 	case RelForeignKey, RelOneToOne:
+		if len(col) == 0 {
 			column = column + "_id"
+		}
 	case RelManyToMany, RelReverseMany, RelReverseOne:
 		column = sf.Name
 	}