From 637797116dfc4254ba16b99f33d486e6552cfb72 Mon Sep 17 00:00:00 2001
From: Sebastiaan de Schaetzen <sebastiaan.de.schaetzen@gmail.com>
Date: Thu, 8 May 2025 19:42:57 +0200
Subject: [PATCH] Add support for pointer arguments

---
 query.go      | 10 +++++++++-
 query_test.go | 33 +++++++++++++++++++++++++++++++++
 2 files changed, 42 insertions(+), 1 deletion(-)

diff --git a/query.go b/query.go
index 362d0c9..992f935 100644
--- a/query.go
+++ b/query.go
@@ -44,6 +44,14 @@ func (q *Query) bindInto(into *int, args ...any) *Query {
 	}
 	for i, arg := range args {
 		*into++
+		v := reflect.ValueOf(arg)
+		if v.Kind() == reflect.Ptr {
+			if v.IsNil() {
+				q.stmt.BindNull(*into)
+				continue
+			}
+			arg = v.Elem().Interface() // Dereference the pointer
+		}
 		if asString, ok := arg.(string); ok {
 			q.stmt.BindText(*into, asString)
 		} else if asInt, ok := arg.(int); ok {
@@ -54,7 +62,7 @@ func (q *Query) bindInto(into *int, args ...any) *Query {
 			q.stmt.BindBool(*into, asBool)
 		} else {
 			// Check if the argument is a slice or array of any type
-			v := reflect.ValueOf(arg)
+			v = reflect.ValueOf(arg)
 			if v.Kind() == reflect.Slice || v.Kind() == reflect.Array {
 				*into--
 				for i := 0; i < v.Len(); i++ {
diff --git a/query_test.go b/query_test.go
index 14144f9..4c07ecb 100644
--- a/query_test.go
+++ b/query_test.go
@@ -100,6 +100,39 @@ func TestUpdateQueryWithWrongArguments(t *testing.T) {
 	require.Error(t, err)
 }
 
+func TestUpdateQueryWithPointerValue(t *testing.T) {
+	db := openTestDb(t)
+	func() {
+		tx := db.MustBegin()
+		defer tx.MustRollback()
+		tx.Query("insert into mytable(key, value) values ('lorem', 'bar')").MustExec()
+		value := "ipsum"
+		key := "lorem"
+		tx.Query("update mytable set value = ? where key = ?").Bind(&value, key).MustExec()
+		tx.MustCommit()
+	}()
+
+	var value string
+	db.Query("select value from mytable where key = 'lorem'").MustScanSingle(&value)
+	require.Equal(t, "ipsum", value)
+}
+
+func TestUpdateQueryWithNullValue(t *testing.T) {
+	db := openTestDb(t)
+	func() {
+		tx := db.MustBegin()
+		defer tx.MustRollback()
+		tx.Query("insert into mytable(key, value) values ('lorem', 'bar')").MustExec()
+		key := "lorem"
+		tx.Query("update mytable set value = ? where key = ?").Bind(nil, key).MustExec()
+		tx.MustCommit()
+	}()
+
+	var value string
+	db.Query("select value from mytable where key = 'lorem'").MustScanSingle(&value)
+	require.Nil(t, value)
+}
+
 func TestQueryWithPointerStringArguments(t *testing.T) {
 	db := openTestDb(t)
 	var result *string