add unique + sort

src/model/mod.rs

@@ -250,6 +250,21 @@ pub trait Model:
         }
     }
 
+    /// Get unique values of a Models field
+    fn unique<T: DeserializeOwned>(
+        filter: mongodb::bson::Document,
+        field: &str,
+    ) -> impl std::future::Future<Output = Vec<T>> {
+        async move {
+            let db = get_mongo!();
+            let collection = col!(db, Self::collection_name());
+            let res = collection.distinct(field, filter, None).await.unwrap();
+            res.into_iter()
+                .filter_map(|x| mongodb::bson::from_bson(x).ok())
+                .collect()
+        }
+    }
+
     /// Get multiple partial `Model`s by using a filter from the database. Pass a `limit` parameter to limit the amount of `Model`s returned.
     #[must_use]
     fn find_partial(
@@ -330,3 +345,20 @@ pub trait Model:
         update: &mut mongodb::bson::Document,
     ) -> impl std::future::Future<Output = ()> + Send;
 }
+
+/// Sorting Order
+///
+/// # Example
+/// ```ignore
+/// let m = MyModel::find(doc! {}, None, Some(doc! {
+///     "sort_key": Sort::Ascending
+/// })).await.unwrap();
+/// ```
+#[repr(i8)]
+#[derive(serde::Serialize, serde::Deserialize, Debug)]
+pub enum Sort {
+    /// Sort in ascending order
+    Ascending = 1,
+    /// Sort in descending order
+    Descending = -1,
+}