data: add custom error message when Page display is not allowed (#8122)

@@ -218,6 +218,7 @@ class Page(models.Model):
 
     public = models.BooleanField(_('Public'), default=True)
     groups = models.ManyToManyField(Group, verbose_name=_('Roles'), blank=True)
+    private_error_message = models.TextField(_('Private error message'), blank=True)

@@ -0,0 +15,4 @@
+          error_msg_p.removeAttribute('hidden')
+        }
+      }
+      page_visibility_form_update()

@@ -547,0 +549,4 @@
+            msg_template = Template(page.private_error_message)
+            msg_render_ctx = {'page': page, 'request': request}
+            msg_render_ctx.update(getattr(request, 'extra_context_data', {}))
+            error_msg = msg_template.render(Context(msg_render_ctx))

@@ -547,0 +562,4 @@
+
+                msg = _(
+                    '%(open_a)s You can try to authenticate yourself %(close_a)s'
+                    % {'open_a': f'<a href="{login_url}">', 'close_a': '</a>'}

@@ -253,3 +253,4 @@
 
     def __init__(self, *args, **kwargs):
         super().__init__(*args, **kwargs)
+        self.fields['public'].widget.attrs.update({'onclick': 'page_visibility_form_update()'})

@@ -547,0 +572,4 @@
+            ctx['page'] = error_page
+            template_name = settings.COMBO_PUBLIC_TEMPLATES['standard'].get('template')
+            response_content = loader.render_to_string(template_name, ctx.flatten(), request)
+            return HttpResponse(response_content, status=403)

@@ -345,0 +346,4 @@
+    page.save()
+    resp = app.get('/', status=403)
+    assert 'Access denied to Home' in resp.text
+    assert 'You can try to authenticate yourself' in resp.text

@@ -547,0 +553,4 @@
+
+            context = {
+                'custom_message': error_msg,
+                'page': Page(title=_('Error - access denied'), template_name=page.template_name),

@@ -0,0 +1,20 @@
+{% extends "combo/page_template.html" %}
+{% load i18n %}
+
+{% block messages %}

@@ -0,0 +12,4 @@
+          {% trans "authenticate yourself using another account" %}
+        </a>.
+      </p>
+    {% else %}

@@ -549,2 +553,3 @@
+                # be viewed, display generic django Permission Denied error
+                raise PermissionDenied()
 
-            return redirect_to_login(request.build_absolute_uri())