From 786c88ea6bd5355c6ecc6b449b1976f76ecb7907 Mon Sep 17 00:00:00 2001
From: dubo-dubon-duponey <dubodubonduponey+github@pm.me>
Date: Sun, 29 Nov 2020 05:39:09 -0800
Subject: [PATCH] fix: treat null user as a no-op (#318)

Closes #317
Signed-off-by: dubo-dubon-duponey <dubodubonduponey+github@pm.me>
---
 docker/resource_docker_container.go | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/docker/resource_docker_container.go b/docker/resource_docker_container.go
index bed5a403..9898a6cd 100644
--- a/docker/resource_docker_container.go
+++ b/docker/resource_docker_container.go
@@ -144,6 +144,13 @@ func resourceDockerContainer() *schema.Resource {
 				Optional: true,
 				ForceNew: true,
 				Elem:     &schema.Schema{Type: schema.TypeString},
+				DiffSuppressFunc: func(k, oldV, newV string, d *schema.ResourceData) bool {
+					// treat "" as a no-op, which is Docker's default value
+					if newV == "" {
+						newV = oldV
+					}
+					return oldV == newV
+				},
 			},
 
 			"dns": {