From 9be2869a10588c889d0a2fc60b610b343bd26525 Mon Sep 17 00:00:00 2001
From: WanYun <code@wanyun.xin>
Date: Thu, 17 Feb 2022 11:21:27 +0800
Subject: [PATCH] Chain closure dynamic condition implementation

---
 chainable_api.go | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/chainable_api.go b/chainable_api.go
index 173479d3..80377aa5 100644
--- a/chainable_api.go
+++ b/chainable_api.go
@@ -150,6 +150,15 @@ func (db *DB) Where(query interface{}, args ...interface{}) (tx *DB) {
 	return
 }
 
+// When Condition established
+func (db *DB) When(expr bool, query func(tx *DB)) (tx *DB) {
+	tx = db.getInstance()
+	if expr {
+		query(tx)
+	}
+	return
+}
+
 // Not add NOT conditions
 func (db *DB) Not(query interface{}, args ...interface{}) (tx *DB) {
 	tx = db.getInstance()