update reference

src/model/reference.rs

@@ -3,7 +3,7 @@ use serde::{de::DeserializeOwned, Deserialize, Serialize};
 
 use crate::{col, get_mongo, id_of};
 
-use super::valid::Validate;
+use super::{valid::Validate, Model};
 
 /// A `Reference` to a `Model`
 #[derive(Debug, Clone, Default, Serialize, Deserialize, PartialEq, Eq)]
@@ -25,6 +25,11 @@ impl Reference {
         Self::new_raw(&format!("{model}::{id}")).await
     }
 
+    /// Get just the ID of the referenced `Model`
+    pub fn id(&self) -> &str {
+        self.0.split_once("::").unwrap().1
+    }
+
     /// Checks if a reference is part of a model collection.
     #[must_use]
     pub fn is_of_collection(&self, col: &str) -> bool {
@@ -60,6 +65,11 @@ impl Reference {
     pub async fn get<T: DeserializeOwned>(&self) -> T {
         mongodb::bson::from_document(self.get_document().await.unwrap()).unwrap()
     }
+
+    /// Get a partial `Model` behind the `Reference` from the database.
+    pub async fn get_partial<T: Model>(&self, part: serde_json::Value) -> T::Partial {
+        T::get_partial(self.id(), part).await.unwrap()
+    }
 }
 
 impl Validate for Reference {