enhance responses from API, integrates with frontend

lootalot_db/src/models/item.rs

@@ -1,5 +1,6 @@
 use diesel::prelude::*;
-use diesel::dsl::{Eq, Filter, Select};
+use diesel::dsl::{Eq, Filter, Select, exists, Find };
+use diesel::expression::exists::Exists;
 use crate::schema::{looted, items};
 use crate::DbConnection;
 
@@ -33,8 +34,9 @@ type WithOwner = Eq<looted::owner_id, i32>;
 type OwnedLoot = Filter<looted::table, WithOwner>;
 
 /// Represents an item that has been looted
-#[derive(Debug, Queryable, Serialize)]
-struct Loot {
+#[derive(Identifiable, Debug, Queryable, Serialize)]
+#[table_name="looted"]
+pub(crate) struct Loot {
     id: i32,
     name: String,
     base_value: i32,
@@ -43,10 +45,14 @@ struct Loot {
 
 impl Loot {
     /// A filter on Loot that is owned by given player
-    fn owned_by(id: i32) -> OwnedLoot {
+    pub(crate) fn owned_by(id: i32) -> OwnedLoot {
         looted::table
             .filter(looted::owner_id.eq(id))
     }
+
+    pub(crate) fn exists(id: i32) -> Exists<Find<looted::table, i32>> {
+        exists(looted::table.find(id))
+    }
 }
 
 type ItemDesc<'a> = (&'a str, i32);