Add site_id as a returned field to netbox_prefixes data source

It can be helpful to know the ID of the site that the prefixes are
assigned to. This allows us to reference it within in our TF code.

netbox/data_source_netbox_prefixes.go

@@ -59,6 +59,10 @@ func dataSourceNetboxPrefixes() *schema.Resource {
 							Type:     schema.TypeString,
 							Computed: true,
 						},
+						"site_id": {
+							Type:     schema.TypeInt,
+							Computed: true,
+						},
 						"vlan_vid": {
 							Type:     schema.TypeFloat,
 							Computed: true,
@@ -146,6 +150,9 @@ func dataSourceNetboxPrefixesRead(d *schema.ResourceData, m interface{}) error {
 		if v.Vrf != nil {
 			mapping["vrf_id"] = v.Vrf.ID
 		}
+		if v.Site != nil {
+			mapping["site_id"] = v.Site.ID
+		}
 		mapping["status"] = v.Status.Value
 		mapping["tags"] = getTagListFromNestedTagList(v.Tags)
 

netbox/data_source_netbox_prefixes_test.go

@@ -49,9 +49,15 @@ resource "netbox_prefix" "with_site_id" {
   site_id = netbox_site.test.id
 }
 
+resource "netbox_site" "test2" {
+  name = "site2-%[1]s"
+  timezone = "Europe/Berlin"
+}
+
 resource "netbox_prefix" "with_container" {
-  prefix = "%[8]s"
-  status = "container"
+  prefix  = "%[8]s"
+  status  = "container"
+  site_id = netbox_site.test2.id
 }
 
 resource "netbox_vrf" "test_vrf" {
@@ -143,6 +149,7 @@ data "netbox_prefixes" "find_prefix_with_contains" {
 					resource.TestCheckResourceAttr("data.netbox_prefixes.find_prefix_with_site_id", "prefixes.0.prefix", "10.0.7.0/24"),
 					resource.TestCheckResourceAttr("data.netbox_prefixes.find_prefix_with_contains", "prefixes.#", "1"),
 					resource.TestCheckResourceAttr("data.netbox_prefixes.find_prefix_with_contains", "prefixes.0.prefix", "10.0.8.0/24"),
+					resource.TestCheckResourceAttrSet("data.netbox_prefixes.find_prefix_with_contains", "prefixes.0.site_id"),
 				),
 			},
 		},