add reference_of!() macro

src/model/reference.rs

@@ -84,3 +84,27 @@ pub trait Referencable {
         Reference(format!("{}::{}", Self::collection_name(), self.id()))
     }
 }
+
+/// Get a `Reference` of `Model` with specific ID
+///
+/// # Parameters
+/// * `model`: The `Model` to look for
+/// * `id`: The ID of the `Model`
+///
+/// # Example
+/// ```ignore
+/// let myref: Option<Reference> = reference_of!(Person, "someid");
+/// ```
+#[macro_export]
+macro_rules! reference_of {
+    ($model:ident, $id:ident) => {{
+        $model::get_partial($id, &serde_json::json!({}))
+            .await
+            .map(|x| x.reference())
+    }};
+    ($model:ident, $id:literal) => {{
+        $model::get_partial($id, &serde_json::json!({}))
+            .await
+            .map(|x| x.reference())
+    }};
+}

src/model/valid.rs

@@ -18,7 +18,7 @@ macro_rules! validate {
 /// It will check all supplied types and return `false` if none are matching.
 ///
 /// # Example
-/// ```
+/// ```ignore
 /// fn validate(&self) -> bool {
 ///     assert_reference_of!(self.owner, Person);
 ///     true