Fixes for 'non field' errors in forms

- Fixes issue where non-model fields would not show error text

InvenTree/InvenTree/forms.py

@@ -28,6 +28,7 @@ class HelperForm(forms.ModelForm):
         self.helper = FormHelper()
 
         self.helper.form_tag = False
+        self.helper.form_show_errors = True
 
         """
         Create a default 'layout' for this form.
@@ -43,11 +44,6 @@ class HelperForm(forms.ModelForm):
 
         valid = super(HelperForm, self).is_valid()
 
-        # Check for errors from model validation
-        # If none, disable crispy form errors
-        if not self.errors:
-            self.helper.form_show_errors = False
-
         return valid
 
     def rebuild_layout(self):

InvenTree/templates/modal_form.html

@@ -1,3 +1,5 @@
+{% load i18n %}
+
 <div>
 {% if form.pre_form_info %}
 <div class='alert alert-info alert-block' role='alert'>
@@ -9,18 +11,6 @@
 {{ form.pre_form_warning }}
 </div>
 {% endif %}
-{% block non_field_error %}
-{% if form.non_field_errors %}
-<div class='alert alert-danger alert-block' role='alert'>
-  <b>Error Submitting Form:</b>
-  <ul>
-    {% for error in form.non_field_errors %}
-    {{ error }}
-    {% endfor %}
-  </ul>
-</div>
-{% endif %}
-{% endblock %}
 </div>
 
 {% block pre_form_content %}