Add default_if_empty flattener to stack_type (#7718) (#14311)

Signed-off-by: Modular Magician <[email protected]>

Author: modular-magician

.changelog/7718.txt

@@ -0,0 +1,3 @@
+```release-note:bug
+compute: fixed a diff that occurred when `stack_type` was unset on `google_compute_ha_vpn_gateway`
+```

google/resource_compute_ha_vpn_gateway.go

@@ -78,7 +78,7 @@ character, which cannot be a dash.`,
 				Optional:     true,
 				ForceNew:     true,
 				ValidateFunc: validateEnum([]string{"IPV4_ONLY", "IPV4_IPV6", ""}),
-				Description: `The stack type for this VPN gateway to identify the IP protocols that are enbaled.
+				Description: `The stack type for this VPN gateway to identify the IP protocols that are enabled.
 If not specified, IPV4_ONLY will be used. Default value: "IPV4_ONLY" Possible values: ["IPV4_ONLY", "IPV4_IPV6"]`,
 				Default: "IPV4_ONLY",
 			},
@@ -364,6 +364,10 @@ func flattenComputeHaVpnGatewayNetwork(v interface{}, d *schema.ResourceData, co
 }
 
 func flattenComputeHaVpnGatewayStackType(v interface{}, d *schema.ResourceData, config *Config) interface{} {
+	if v == nil || isEmptyValue(reflect.ValueOf(v)) {
+		return "IPV4_ONLY"
+	}
+
 	return v
 }
 

website/docs/r/compute_ha_vpn_gateway.html.markdown

@@ -173,7 +173,7 @@ The following arguments are supported:
 
 * `stack_type` -
   (Optional)
-  The stack type for this VPN gateway to identify the IP protocols that are enbaled.
+  The stack type for this VPN gateway to identify the IP protocols that are enabled.
   If not specified, IPV4_ONLY will be used.
   Default value is `IPV4_ONLY`.
   Possible values are: `IPV4_ONLY`, `IPV4_IPV6`.