- save & load

- key navigation
- ui improvements

assets/src/model.js

@@ -41,11 +41,15 @@ export default class Model {
         this.commit(data);
     }
 
+    get errors() {
+        return this.data.__errors__
+    }
+
     /**
      * Get instance id from its data
      */
     static getId(data) {
-        return data.id;
+        return 'id' in data ? data.id : data.pk;
     }
 
     /**
@@ -112,8 +116,16 @@ export default class Model {
      * Update instance's data with provided data. Return None
      */
     commit(data) {
-        this.id = this.constructor.getId(data);
         this.data = data;
+        this.id = this.constructor.getId(this.data);
+    }
+
+    /**
+     * Update model data, without reset previous value
+     */
+    update(data) {
+        this.data = {...this.data, ...data}
+        this.id = this.constructor.getId(this.data)
     }
 
     /**
@@ -130,6 +142,13 @@ export default class Model {
         let item = window.localStorage.getItem(key);
         return item === null ? item : new this(JSON.parse(item));
     }
+
+    /**
+     * Return error for a specific attribute name if any 
+     */
+    error(attr=null) {
+        return attr === null ? this.errors : this.errors && this.errors[attr]
+    }
 }