#334 Allow admin bulk delete on InforequestEmail model (#414)

* #334 Allow admin bulk delete on InforequestEmail model

* #334 Filter related actions

chcemvediet/apps/inforequests/admin.py

@@ -253,13 +253,54 @@ class InforequestEmailAdmin(admin.ModelAdmin):
             ]
     inlines = [
             ]
+    actions = [
+            u'delete_selected'
+    ]
 
     def get_queryset(self, request):
         queryset = super(InforequestEmailAdmin, self).get_queryset(request)
         queryset = queryset.select_related(u'inforequest')
         queryset = queryset.select_related(u'email')
         return queryset
 
+    def delete_constraints(self, objs):
+        constraints = []
+        for obj in objs:
+            actions = Action.objects.of_inforequest(obj.inforequest).filter(email=obj.email)
+            if actions:
+                constraints.append(format_html(
+                    u'{} is used for {}.'.format(
+                            admin_obj_format(obj),
+                            u', '.join([admin_obj_format(action) for action in actions]),
+                    )))
+        return constraints
+
+    def render_delete_form(self, request, context):
+        context[u'delete_constraints'] = self.delete_constraints([context[u'object']])
+        return super(InforequestEmailAdmin, self).render_delete_form(request, context)
+
+    @decorate(short_description=u'Delete selected inforequestemails')
+    @transaction.atomic
+    def delete_selected(self, request, queryset):
+        if request.POST.get(u'post'):
+            if self.delete_constraints(queryset):
+                raise PermissionDenied
+
+        template_response = delete_selected(self, request, queryset)
+
+        if request.POST.get(u'post'):
+            return None
+
+        template_response.context_data.update({
+            u'delete_constraints': self.delete_constraints(queryset),
+        })
+        return template_response
+
+    def delete_model(self, request, obj):
+        if self.delete_constraints([obj]):
+            raise PermissionDenied
+        return super(InforequestEmailAdmin, self).delete_model(request, obj)
+
 @admin.register(Branch, site=admin.site)
 class BranchAdmin(DeleteNestedInforequestEmailAdminMixin, admin.ModelAdmin):
     date_hierarchy = None

chcemvediet/apps/inforequests/templates/admin/inforequests/inforequestemail/delete_confirmation.html

@@ -0,0 +1,17 @@
+{% extends "admin/delete_confirmation.html" %}
+{% load amend before set_attributes from poleno.amend %}
+
+{% block content %}
+  {% amend %}
+    {{ block.super }}
+    {% if delete_constraints %}
+      {% before path=".//form" %}
+        <div class="errornote">
+          <p>Delete not allowed.</p>
+          <ul>{{ delete_constraints|unordered_list }}</ul>
+        </div>
+      {% endbefore %}
+      {% set_attributes path=".//form//input[@type='submit']" disabled=True %}
+    {% endif %}
+  {% endamend %}
+{% endblock %}

chcemvediet/apps/inforequests/templates/admin/inforequests/inforequestemail/delete_selected_confirmation.html

@@ -0,0 +1,17 @@
+{% extends "admin/delete_selected_confirmation.html" %}
+{% load amend before set_attributes from poleno.amend %}
+
+{% block content %}
+  {% amend %}
+    {{ block.super }}
+    {% before path=".//form//input[@type='submit']" %}
+      {% if delete_constraints %}
+        <div class="errornote">
+          <p>Delete not allowed.</p>
+          <ul>{{ delete_constraints|unordered_list }}</ul>
+        </div>
+        {% set_attributes path=".//form//input[@type='submit']" disabled=True %}
+      {% endif %}
+    {% endbefore %}
+  {% endamend %}
+{% endblock %}