helper/schema: ResourceData.Get works in most cases

helper/schema/resource_data.go

@@ -37,6 +37,8 @@ func (d *ResourceData) getObject(
 	k string,
 	parts []string,
 	schema map[string]*Schema) interface{} {
+	if len(parts) > 0 {
+		// We're requesting a specific key in an object
 		key := parts[0]
 		parts = parts[1:]
 		s, ok := schema[key]
@@ -44,7 +46,22 @@ func (d *ResourceData) getObject(
 			return nil
 		}
 
+		if k != "" {
+			// If we're not at the root, then we need to append
+			// the key to get the full key path.
+			key = fmt.Sprintf("%s.%s", k, key)
+		}
+
 		return d.get(key, parts, s)
+	}
+
+	// Get the entire object
+	result := make(map[string]interface{})
+	for field, _ := range schema {
+		result[field] = d.getObject(k, []string{field}, schema)
+	}
+
+	return result
 }
 
 func (d *ResourceData) getList(

helper/schema/resource_data_test.go

@@ -172,6 +172,84 @@ func TestResourceDataGet(t *testing.T) {
 
 			Value: []interface{}{1, 2, 5},
 		},
+
+		{
+			Schema: map[string]*Schema{
+				"ingress": &Schema{
+					Type:     TypeList,
+					Required: true,
+					Elem: &Resource{
+						Schema: map[string]*Schema{
+							"from": &Schema{
+								Type:     TypeInt,
+								Required: true,
+							},
+						},
+					},
+				},
+			},
+
+			State: nil,
+
+			Diff: &terraform.ResourceDiff{
+				Attributes: map[string]*terraform.ResourceAttrDiff{
+					"ingress.#": &terraform.ResourceAttrDiff{
+						Old: "",
+						New: "1",
+					},
+					"ingress.0.from": &terraform.ResourceAttrDiff{
+						Old: "",
+						New: "8080",
+					},
+				},
+			},
+
+			Key: "ingress.0",
+
+			Value: map[string]interface{}{
+				"from": 8080,
+			},
+		},
+
+		{
+			Schema: map[string]*Schema{
+				"ingress": &Schema{
+					Type:     TypeList,
+					Required: true,
+					Elem: &Resource{
+						Schema: map[string]*Schema{
+							"from": &Schema{
+								Type:     TypeInt,
+								Required: true,
+							},
+						},
+					},
+				},
+			},
+
+			State: nil,
+
+			Diff: &terraform.ResourceDiff{
+				Attributes: map[string]*terraform.ResourceAttrDiff{
+					"ingress.#": &terraform.ResourceAttrDiff{
+						Old: "",
+						New: "1",
+					},
+					"ingress.0.from": &terraform.ResourceAttrDiff{
+						Old: "",
+						New: "8080",
+					},
+				},
+			},
+
+			Key: "ingress",
+
+			Value: []interface{}{
+				map[string]interface{}{
+					"from": 8080,
+				},
+			},
+		},
 	}
 
 	for i, tc := range cases {