feat 修改article的搜索

structs/storage/article.go

@@ -119,7 +119,12 @@ func (f *FindArticleQuery) Scope(db *gorm.DB) *gorm.DB {
 		db = db.Where("available=?", *f.Available)
 	}
 	if f.Ban != nil {
-		db = db.Where("ban=?", *f.Ban)
+		if *f.Ban {
+			db = db.Where("ban=?", *f.Ban)
+		} else {
+			db = db.Where("(ban=? or ban is null)", false)
+		}
+
 	}
 	return db
 }