Display error message when form submission returns error

assets/release_notes.md

@@ -4,9 +4,12 @@
 ### 0.4.4 - August 2021
 ---
 
+- Add ability to create new Part Categories
+- Add ability to create new Parts
+- Add ability to create new Stock Locations
 - App bar now always displays "back" button
 - Display "batch code" information for stock item
-- Display "packagin" information for stock item
+- Display "packaging" information for stock item
 
 ### 0.4.3 - August 2021
 ---

lib/api.dart

@@ -540,7 +540,7 @@ class InvenTreeAPI {
    * Perform a HTTP POST request
    * Returns a json object (or null if unsuccessful)
    */
-  Future<APIResponse> post(String url, {Map<String, dynamic> body = const {}, int expectedStatusCode=201}) async {
+  Future<APIResponse> post(String url, {Map<String, dynamic> body = const {}, int? expectedStatusCode=201}) async {
 
     HttpClientRequest? request = await apiRequest(url, "POST");
 
@@ -763,7 +763,7 @@ class InvenTreeAPI {
    * Perform a HTTP GET request
    * Returns a json object (or null if did not complete)
    */
-  Future<APIResponse> get(String url, {Map<String, String> params = const {}, int expectedStatusCode=200}) async {
+  Future<APIResponse> get(String url, {Map<String, String> params = const {}, int? expectedStatusCode=200}) async {
 
     HttpClientRequest? request = await apiRequest(
       url,

lib/api_form.dart

@@ -597,12 +597,14 @@ class _APIFormWidgetState extends State<APIFormWidget> {
     if (method == "POST") {
       return await InvenTreeAPI().post(
         url,
-        body: data
+        body: data,
+        expectedStatusCode: null
       );
     } else {
       return await InvenTreeAPI().patch(
         url,
         body: data,
+        expectedStatusCode: null
       );
     }
 
@@ -660,6 +662,10 @@ class _APIFormWidgetState extends State<APIFormWidget> {
         return;
       case 400:
         // Form submission / validation error
+        showSnackIcon(
+          L10().error,
+          success: false
+        );
 
         // Update field errors
         for (var field in fields) {

lib/widget/submit_feedback.dart

@@ -1,6 +1,5 @@
 
 
-import 'package:email_validator/email_validator.dart';
 import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';