Adds convenience function for editing model

lib/inventree/model.dart

@@ -9,6 +9,7 @@ import 'package:url_launcher/url_launcher.dart';
 import 'package:path/path.dart' as path;
 
 import '../l10.dart';
+import '../api_form.dart';
 
 
 // Paginated response object
@@ -64,6 +65,30 @@ class InvenTreeModel {
 
   }
 
+  // Fields for editing / creating this model
+  // Override per-model
+  Map<String, dynamic> formFields() {
+
+    return {};
+  }
+
+  Future<void> editForm(BuildContext context, String title, {Map<String, dynamic> fields=const {}, Function? onSuccess}) async {
+
+    if (fields.isEmpty) {
+      fields = formFields();
+    }
+
+    launchApiForm(
+      context,
+      title,
+      url,
+      fields,
+      modelData: jsondata,
+      onSuccess: onSuccess
+    );
+
+  }
+
   // JSON data which defines this object
   Map<String, dynamic> jsondata = {};
 

lib/inventree/part.dart

@@ -16,6 +16,16 @@ class InvenTreePartCategory extends InvenTreeModel {
   @override
   String get URL => "part/category/";
 
+  @override
+  Map<String, dynamic> formFields() {
+
+    return {
+      "name": {},
+      "description": {},
+      "parent": {}
+    };
+  }
+
   @override
   Map<String, String> defaultListFilters() {
     var filters = new Map<String, String>();

lib/widget/category_display.dart

@@ -60,7 +60,6 @@ class _CategoryDisplayState extends RefreshableState<CategoryDisplayWidget> {
   }
 
   void _editCategoryDialog(BuildContext context) {
-
     final _cat = category;
 
     // Cannot edit top-level category
@@ -68,18 +67,7 @@ class _CategoryDisplayState extends RefreshableState<CategoryDisplayWidget> {
       return;
     }
 
-    launchApiForm(
-      context,
-      L10().editCategory,
-      _cat.url,
-      {
-        "name": {},
-        "description": {},
-        "parent": {},
-      },
-      modelData: _cat.jsondata,
-      onSuccess: refresh,
-    );
+    _cat.editForm(context, L10().editCategory, onSuccess: refresh);
   }
 
   _CategoryDisplayState(this.category);
@@ -227,12 +215,7 @@ class _CategoryDisplayState extends RefreshableState<CategoryDisplayWidget> {
         context,
         L10().categoryCreate,
         InvenTreePartCategory().URL,
-        {
-          "name": {},
-          "description": {},
-          "parent": {
-          }
-        },
+        InvenTreePartCategory().formFields(),
         modelData: {
           "parent": (pk > 0) ? pk : null,
         }