Refactores plugins, fixes on mailing contacts and improved resource validation

TODO.md

@@ -149,20 +149,16 @@
 
 * Resource used_list_display=True, allocated_list_displat=True, allow resources to show up on list_display
 
-* Move plugins back from apps to orchestra main app
-
 * BackendLog.updated_at (tasks that run over several minutes when finished they do not appear first on the changelist) (like celery tasks.when)
 
-* Validate a model path exists between resource.content_type and backend.model
-
 * Periodic task for cleaning old monitoring data
 
-* Generate reports of Account contracted services
-
 * Create an admin service_view with icons (like SaaS app)
 
 * Fix ftp traffic
 
 * Resource graph for each related object
 
-* contacts filter by email_usage fix exact for contains
+* Rename apache logs ending on .log in order to logrotate easily
+
+* SaaS wordpress multiple blogs per user? separate users from sites?

orchestra/admin/actions.py

@@ -3,8 +3,9 @@ from django.core.mail import send_mass_mail
 from django.shortcuts import render
 from django.utils.translation import ungettext, ugettext_lazy as _
 
-from orchestra.admin.utils import change_url
+from .. import settings
 
+from .utils import change_url
 from .forms import SendEmailForm
 
 
@@ -13,18 +14,19 @@ class SendEmail(object):
     short_description = _("Send email")
     form = SendEmailForm
     template = 'admin/orchestra/generic_confirmation.html'
+    default_from = settings.ORCHESTRA_DEFAULT_SUPPORT_FROM_EMAIL
     __name__ = 'semd_email'
     
     def __call__(self, modeladmin, request, queryset):
         """ make this monster behave like a function """
         self.modeladmin = modeladmin
         self.queryset = queryset
-        opts = modeladmin.model._meta
-        app_label = opts.app_label
+        self.opts = modeladmin.model._meta
+        app_label = self.opts.app_label
         self.context = {
             'action_name': _("Send email"),
             'action_value': self.__name__,
-            'opts': opts,
+            'opts': self.opts,
             'app_label': app_label,
             'queryset': queryset,
             'action_checkbox_name': admin.helpers.ACTION_CHECKBOX_NAME,
@@ -34,14 +36,17 @@ class SendEmail(object):
     def write_email(self, request):
         if not request.user.is_superuser:
             raise PermissionDenied
-        form = self.form()
+        initial={
+            'email_from': self.default_from,
+            'to': ' '.join(self.queryset.values_list('email', flat=True))
+        }
+        form = self.form(initial=initial)
         if request.POST.get('post'):
-            form = self.form(request.POST)
+            form = self.form(request.POST, initial=initial)
             if form.is_valid():
                 options = {
                     'email_from': form.cleaned_data['email_from'],
-                    'cc': form.cleaned_data['cc'],
-                    'bcc': form.cleaned_data['bcc'],
+                    'extra_to': form.cleaned_data['extra_to'],
                     'subject': form.cleaned_data['subject'],
                     'message': form.cleaned_data['message'],
                     
@@ -50,7 +55,7 @@ class SendEmail(object):
         opts = self.modeladmin.model._meta
         app_label = opts.app_label
         self.context.update({
-            'title': _("Send e-mail to contacts"),
+            'title': _("Send e-mail to %s") % self.opts.verbose_name_plural,
             'content_title': "",
             'form': form,
             'submit_value': _("Continue"),
@@ -61,31 +66,36 @@ class SendEmail(object):
     def confirm_email(self, request, **options):
         num = len(self.queryset)
         email_from = options['email_from']
-        bcc = options['bcc']
-        to = options['cc']
+        extra_to = options['extra_to']
         subject = options['subject']
         message = options['message']
         # The user has already confirmed
         if request.POST.get('post') == 'email_confirmation':
+            emails = []
             for contact in self.queryset.all():
-                to.append(contact.email)
-            send_mass_mail(subject, message, email_from, to, bcc)
+                emails.append((subject, message, email_from, [contact.email]))
+            if extra_to:
+                emails.append((subject, message, email_from, extra_to))
+            send_mass_mail(emails)
             msg = ungettext(
                 _("Message has been sent to %s.") % str(contact),
-                _("Message has been sent to %i contacts.") % num,
+                _("Message has been sent to %i %s.") % (num, self.opts.verbose_name_plural),
                 num
             )
             self.modeladmin.message_user(request, msg)
             return None
         
         form = self.form(initial={
+            'email_from': email_from,
+            'extra_to': ', '.join(extra_to),
             'subject': subject,
             'message': message
         })
         self.context.update({
             'title': _("Are you sure?"),
             'content_message': _(
-                "Are you sure you want to send the following message to the following contacts?"),
+                "Are you sure you want to send the following message to the following %s?"
+            ) % self.opts.verbose_name_plural,
             'display_objects': ["%s (%s)" % (contact, contact.email) for contact in self.queryset],
             'form': form,
             'subject': subject,

orchestra/admin/forms.py

@@ -2,10 +2,13 @@ from functools import partial
 
 from django import forms
 from django.contrib.admin import helpers
+from django.core import validators
 from django.forms.models import modelformset_factory, BaseModelFormSet
 from django.template import Template, Context
 from django.utils.translation import ugettext_lazy as _
 
+from orchestra.forms.widgets import ShowTextWidget, ReadOnlyWidget
+
 from ..core.validators import validate_password
 
 
@@ -129,3 +132,39 @@ class AdminPasswordChangeForm(forms.Form):
         return ['password']
     changed_data = property(_get_changed_data)
 
+
+class SendEmailForm(forms.Form):
+    email_from = forms.EmailField(label=_("From"),
+            widget=forms.TextInput(attrs={'size':'118'}))
+    to = forms.CharField(label="To", required=False,
+            widget=ShowTextWidget())
+    extra_to = forms.CharField(label="To (extra)", required=False,
+            widget=forms.TextInput(attrs={'size':'118'}))
+    subject = forms.CharField(label=_("Subject"),
+            widget=forms.TextInput(attrs={'size':'118'}))
+    message = forms.CharField(label=_("Message"),
+            widget=forms.Textarea(attrs={'cols': 118, 'rows': 15}))
+    
+    def __init__(self, *args, **kwargs):
+        super(SendEmailForm, self).__init__(*args, **kwargs)
+        initial = kwargs.get('initial')
+        if 'to' in initial:
+            self.fields['to'].widget = ReadOnlyWidget(initial['to'])
+        else:
+            self.fields.pop('to')
+    
+    def clean_comma_separated_emails(self, value):
+        clean_value = []
+        for email in value.split(','):
+            email = email.strip()
+            if email:
+                try:
+                    validators.validate_email(email)
+                except validators.ValidationError:
+                    raise validators.ValidationError("Comma separated email addresses.")
+                clean_value.append(email)
+        return clean_value
+    
+    def clean_extra_to(self):
+        extra_to = self.cleaned_data['extra_to']
+        return self.clean_comma_separated_emails(extra_to)

orchestra/apps/accounts/actions.py

@@ -39,13 +39,22 @@ list_contacts.verbose_name = _("List contacts")
 
 def service_report(modeladmin, request, queryset):
     accounts = []
-    for account in queryset:
+    fields = []
+    # First we get related manager names to fire a prefetch related
+    for name, field in queryset.model._meta._name_map.iteritems():
+        model = field[0].model
+        if model in services.get() and model != queryset.model:
+            fields.append((model, name))
+    sorted(fields, key=lambda i: i[0]._meta.verbose_name_plural.lower())
+    fields = [field for model, field in fields]
+    
+    for account in queryset.prefetch_related(*fields):
         items = []
-        for service in services.get():
-            if service != type(account):
-                items.append((service._meta, service.objects.filter(account=account)))
-        sorted(items, key=lambda i: i[0].verbose_name_plural.lower())
+        for field in fields:
+            related_manager = getattr(account, field)
+            items.append((related_manager.model._meta, related_manager.all()))
         accounts.append((account, items))
+    
     context = {
         'accounts': accounts,
         'date': timezone.now().today()

orchestra/apps/accounts/admin.py

@@ -13,6 +13,7 @@ from django.utils.six.moves.urllib.parse import parse_qsl
 from django.utils.translation import ugettext_lazy as _
 
 from orchestra.admin import ExtendedModelAdmin, ChangePasswordAdminMixin
+from orchestra.admin.actions import SendEmail
 from orchestra.admin.utils import wrap_admin_view, admin_link, set_url_query, change_url
 from orchestra.core import services, accounts
 from orchestra.forms import UserChangeForm
@@ -61,7 +62,7 @@ class AccountAdmin(ChangePasswordAdminMixin, auth.UserAdmin, ExtendedModelAdmin)
     filter_horizontal = ()
     change_readonly_fields = ('username', 'main_systemuser_link')
     change_form_template = 'admin/accounts/account/change_form.html'
-    actions = [disable, list_contacts, service_report]
+    actions = [disable, list_contacts, service_report, SendEmail()]
     change_view_actions = [disable, service_report]
     list_select_related = ('billcontact',)
     ordering = ()

orchestra/apps/accounts/templates/admin/accounts/account/service_report.html

@@ -1,7 +1,7 @@
-{% load utils %}
+{% load utils i18n %}
 <html>
 <head>
-    <title>{% block title %}Service Report{% endblock %}</title>
+    <title>{% block title %}Account service report{% endblock %}</title>
     <meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
     {% block head %}{% endblock %}
     <style type="text/css">
@@ -11,11 +11,11 @@
             float: none !important;
             font-family: Arial, 'Liberation Sans', 'DejaVu Sans', sans-serif;
             font-size: 12px;
-            color: #2E2E2E;
+            color: #444;
         }
         #date {
             float: right;
-            color: #666;
+            color: rgb(102, 102, 102);
         }
         .account-content {
             margin: 0px 0px 40px 20px;
@@ -23,27 +23,38 @@
         .item-title {
             list-style-type: none;
             font-weight: bold;
+            color: #666;
         }
         .items-ul {
             padding: 0px;
             margin: 5px 0px 10px 20px;
         }
+        .related {
+            list-style: disc;
+        }
+        hr {
+            margin-top: -9px;
+        }
+        a {
+            text-decoration: none;
+            color: rgb(91, 128, 178);
+        }
     </style>
 </head>
 
 <body>
-<div id="date">Service report generated on {{ date | date }}</div>
+<div id="date">{% trans "Service report generated on" %} {{ date | date }}</div>
 {% for account, items in accounts %}
-    <h3>{{ account.get_full_name }} ({{ account.username }})</h3>
+    <h3>{{ account.get_full_name }} - <a href="{{ account|admin_url }}">{{ account.username }}</a></h3>
     <hr>
     <div class="account-content">
-        {{ account.get_type_display }} account registered on {{ account.date_joined | date }}<br>
+        {{ account.get_type_display }} {% trans "account registered on" %} {{ account.date_joined | date }}<br>
         <ul class="items-ul">
         {% for opts, related in items %}
             <li class="item-title">{{ opts.verbose_name_plural|capfirst }}</li>
             <ul>
             {% for obj in related %}
-                <li>{{ obj }}{% if not obj|isactive %} (disabled){% endif %}</li>
+                <li class="related"><a href="{{ obj|admin_url }}">{{ obj }}</a>{% if not obj|isactive %} ({% trans "disabled" %}){% endif %}</li>
             {% endfor %}
             </ul>
         {% endfor %}

orchestra/apps/contacts/admin.py

@@ -3,11 +3,12 @@ from django.contrib import admin
 from django.utils.translation import ugettext, ugettext_lazy as _
 
 from orchestra.admin import AtLeastOneRequiredInlineFormSet, ExtendedModelAdmin
+from orchestra.admin.actions import SendEmail
 from orchestra.admin.utils import insertattr, admin_link, change_url
 from orchestra.apps.accounts.admin import AccountAdmin, AccountAdminMixin
 from orchestra.forms.widgets import paddingCheckboxSelectMultiple
 
-from .actions import SendEmail
+from .filters import EmailUsageListFilter
 from .models import Contact
 
 
@@ -16,7 +17,7 @@ class ContactAdmin(AccountAdminMixin, ExtendedModelAdmin):
         'dispaly_name', 'email', 'phone', 'phone2', 'country', 'account_link'
     )
     # TODO email usage custom filter contains
-    list_filter = ('email_usage',)
+    list_filter = (EmailUsageListFilter,)
     search_fields = (
         'account__username', 'account__full_name', 'short_name', 'full_name', 'phone', 'phone2',
         'email'

orchestra/apps/contacts/filters.py

@@ -0,0 +1,16 @@
+from django.contrib.admin import SimpleListFilter
+from django.utils.translation import ugettext_lazy as _
+
+from .models import Contact
+
+
+class EmailUsageListFilter(SimpleListFilter):
+    title = _("email usages")
+    parameter_name = 'email_usages'
+    
+    def lookups(self, request, model_admin):
+        return Contact.email_usage.field.choices
+    
+    def queryset(self, request, queryset):
+        value = self.value().split(',')
+        return queryset.filter(email_usages=value)

orchestra/apps/contacts/forms.py

@@ -1,36 +0,0 @@
-from django import forms
-from django.core import validators
-from django.utils.translation import ungettext, ugettext_lazy as _
-
-from orchestra.forms.widgets import ShowTextWidget
-
-from . import settings
-
-
-class SendEmailForm(forms.Form):
-    email_from = forms.EmailField(label=_("From"),
-            initial=settings.CONTACTS_DEFAULT_FROM_EMAIL,
-            widget=forms.TextInput(attrs={'size':'118'}))
-    cc = forms.CharField(label="CC", required=False,
-            widget=forms.TextInput(attrs={'size':'118'}))
-    bcc = forms.CharField(label="BCC", required=False,
-            widget=forms.TextInput(attrs={'size':'118'}))
-    subject = forms.CharField(label=_("Subject"),
-            widget=forms.TextInput(attrs={'size':'118'}))
-    message = forms.CharField(label=_("Message"),
-            widget=forms.Textarea(attrs={'cols': 118, 'rows': 15}))
-    
-    def clean_space_separated_emails(self, value):
-        value = value.split()
-        for email in value:
-            try:
-                validators.validate_email(email)
-            except validators.ValidationError:
-                raise validators.ValidationError("Space separated emails.")
-        return value
-    
-    def clean_cc(self):
-        return self.clean_space_separated_emails(self.cleaned_data['cc'])
-    
-    def clean_bcc(self):
-        return self.clean_space_separated_emails(self.cleaned_data['bcc'])

orchestra/apps/contacts/settings.py

@@ -2,18 +2,22 @@ from django.conf import settings
 from django_countries import data
 
 
-CONTACTS_DEFAULT_EMAIL_USAGES = getattr(settings, 'CONTACTS_DEFAULT_EMAIL_USAGES',
-    ('SUPPORT', 'ADMIN', 'BILLING', 'TECH', 'ADDS', 'EMERGENCY')
-)
+CONTACTS_DEFAULT_EMAIL_USAGES = getattr(settings, 'CONTACTS_DEFAULT_EMAIL_USAGES', (
+    'SUPPORT',
+    'ADMIN',
+    'BILLING',
+    'TECH',
+    'ADDS',
+    'EMERGENCY'
+))
 
 
 CONTACTS_DEFAULT_CITY = getattr(settings, 'CONTACTS_DEFAULT_CITY', 'Barcelona')
 
 
-CONTACTS_COUNTRIES = getattr(settings, 'CONTACTS_COUNTRIES', ((k,v) for k,v in data.COUNTRIES.iteritems()))
+CONTACTS_COUNTRIES = getattr(settings, 'CONTACTS_COUNTRIES', (
+    (k,v) for k,v in data.COUNTRIES.iteritems()
+))
 
 
 CONTACTS_DEFAULT_COUNTRY = getattr(settings, 'CONTACTS_DEFAULT_COUNTRY', 'ES')
-
-
-CONTACTS_DEFAULT_FROM_EMAIL = getattr(settings, 'CONTACTS_DEFAULT_FROM_EMAIL', 'support@orchestra.lan')

orchestra/apps/domains/filters.py

@@ -1,11 +1,10 @@
 from django.contrib.admin import SimpleListFilter
-from django.utils.encoding import force_text
 from django.utils.translation import ugettext_lazy as _
 
 
 class TopDomainListFilter(SimpleListFilter):
     """ Filter Nodes by group according to request.user """
-    title = _("Top domains")
+    title = _("top domains")
     parameter_name = 'top_domain'
     
     def lookups(self, request, model_admin):

orchestra/apps/miscellaneous/admin.py

@@ -8,8 +8,8 @@ from django.utils.translation import ugettext_lazy as _
 from orchestra.admin import ExtendedModelAdmin
 from orchestra.admin.utils import admin_link
 from orchestra.apps.accounts.admin import AccountAdminMixin
-from orchestra.apps.plugins import PluginModelAdapter
-from orchestra.apps.plugins.admin import SelectPluginAdminMixin
+from orchestra.plugins import PluginModelAdapter
+from orchestra.plugins.admin import SelectPluginAdminMixin
 
 from . import settings
 from .models import MiscService, Miscellaneous
@@ -26,7 +26,9 @@ class MiscServiceAdmin(ExtendedModelAdmin):
     )
     list_editable = ('is_active',)
     list_filter = ('has_identifier', 'has_amount', 'is_active')
-    fields = ('verbose_name', 'name', 'description', 'has_identifier', 'has_amount', 'is_active')
+    fields = (
+        'verbose_name', 'name', 'description', 'has_identifier', 'has_amount', 'is_active'
+    )
     prepopulated_fields = {'name': ('verbose_name',)}
     change_readonly_fields = ('name',)
     
@@ -51,9 +53,12 @@ class MiscServiceAdmin(ExtendedModelAdmin):
 
 
 class MiscellaneousAdmin(AccountAdminMixin, SelectPluginAdminMixin, admin.ModelAdmin):
-    list_display = ('__unicode__', 'service_link', 'amount', 'dispaly_active', 'account_link')
+    list_display = (
+        '__unicode__', 'service_link', 'amount', 'dispaly_active', 'account_link'
+    )
     list_filter = ('service__name', 'is_active')
     list_select_related = ('service', 'account')
+    search_fields = ('identifier', 'description')
     plugin_field = 'service'
     plugin = MiscServicePlugin
     

orchestra/apps/orchestration/backends.py

@@ -5,7 +5,7 @@ from django.utils import timezone
 from django.utils.functional import cached_property
 from django.utils.translation import ugettext_lazy as _
 
-from orchestra.apps import plugins
+from orchestra import plugins
 
 from . import methods
 

orchestra/apps/payments/admin.py

@@ -5,7 +5,7 @@ from django.utils.translation import ugettext_lazy as _
 from orchestra.admin import ChangeViewActionsMixin, ExtendedModelAdmin
 from orchestra.admin.utils import admin_colored, admin_link
 from orchestra.apps.accounts.admin import AccountAdminMixin, SelectAccountAdminMixin
-from orchestra.apps.plugins.admin import SelectPluginAdminMixin
+from orchestra.plugins.admin import SelectPluginAdminMixin
 
 from . import actions
 from .methods import PaymentMethod

orchestra/apps/payments/methods/creditcard.py

@@ -2,7 +2,7 @@ from django import forms
 from django.utils.translation import ugettext_lazy as _
 from rest_framework import serializers
 
-from orchestra.apps.plugins.forms import PluginDataForm
+from orchestra.plugins.forms import PluginDataForm
 
 from .options import PaymentMethod
 

orchestra/apps/payments/methods/options.py

@@ -2,7 +2,7 @@ from dateutil import relativedelta
 from django import forms
 from django.core.exceptions import ValidationError
 
-from orchestra.apps import plugins
+from orchestra import plugins
 from orchestra.utils.functional import cached
 from orchestra.utils.python import import_class
 

orchestra/apps/payments/methods/sepadirectdebit.py

@@ -12,7 +12,7 @@ from django_iban.forms import IBANFormField
 from django_iban.validators import IBANValidator, IBAN_COUNTRY_CODE_LENGTH
 from rest_framework import serializers
 
-from orchestra.apps.plugins.forms import PluginDataForm
+from orchestra.plugins.forms import PluginDataForm
 
 from .. import settings
 from .options import PaymentMethod

orchestra/apps/resources/models.py

@@ -86,6 +86,21 @@ class Resource(models.Model):
     
     def clean(self):
         self.verbose_name = self.verbose_name.strip()
+        # Validate that model path exists between ct and each monitor.model
+        monitor_errors = []
+        for monitor in self.monitors:
+            try:
+                self.get_model_path(monitor)
+            except (RuntimeError, LookupError):
+                monitor_errors.append(monitor)
+        if monitor_errors:
+            raise validators.ValidationError({
+                'monitors': [
+                    _("Path does not exists between '%s' and '%s'") % (
+                        get_model(ServiceMonitor.get_backend(monitor).model)._meta.model_name,
+                        self.content_type.model_class()._meta.model_name,
+                    ) for error in monitor_errors
+                ]})
     
     def save(self, *args, **kwargs):
         created = not self.pk
@@ -99,6 +114,13 @@ class Resource(models.Model):
         super(Resource, self).delete(*args, **kwargs)
         name = 'monitor.%s' % str(self)
     
+    def get_model_path(self, monitor):
+        """ returns a model path between self.content_type and monitor.model """
+        resource_model = self.content_type.model_class()
+        model_path = ServiceMonitor.get_backend(monitor).model
+        monitor_model = get_model(model_path)
+        return get_model_field_path(monitor_model, resource_model)
+    
     def sync_periodic_task(self):
         name = 'monitor.%s' % str(self)
         if self.pk and self.crontab:
@@ -190,17 +212,14 @@ class ResourceData(models.Model):
         today = timezone.now()
         datasets = []
         for monitor in resource.monitors:
-            resource_model = self.content_type.model_class()
-            model_path = ServiceMonitor.get_backend(monitor).model
-            monitor_model = get_model(model_path)
-            if resource_model == monitor_model:
+            path = self.resource.get_model_path(monitor)
+            if path == []:
                 dataset = MonitorData.objects.filter(
                     monitor=monitor,
                     content_type=self.content_type_id,
                     object_id=self.object_id
                 )
             else:
-                path = get_model_field_path(monitor_model, resource_model)
                 fields = '__'.join(path)
                 objects = monitor_model.objects.filter(**{fields: self.object_id})
                 pks = objects.values_list('id', flat=True)

orchestra/apps/resources/validators.py

@@ -1,8 +1,11 @@
 from django.core.validators import ValidationError
+from django.utils.translation import ugettext_lazy as _
 
 
 def validate_scale(value):
     try:
         int(eval(value))
-    except ValueError:
-        raise ValidationError(_("%s value is not a valid scale expression"))
+    except Exception, e:
+        raise ValidationError(
+            _("'%s' is not a valid scale expression. (%s)") % (value, str(e))
+        )

orchestra/apps/saas/admin.py

@@ -2,7 +2,7 @@ from django.contrib import admin
 from django.utils.translation import ugettext_lazy as _
 
 from orchestra.apps.accounts.admin import AccountAdminMixin
-from orchestra.apps.plugins.admin import SelectPluginAdminMixin
+from orchestra.plugins.admin import SelectPluginAdminMixin
 
 from .models import SaaS
 from .services import SoftwareService

orchestra/apps/saas/services/moodle.py

@@ -1,7 +1,7 @@
 from django import forms
 from django.utils.translation import ugettext_lazy as _
 
-from orchestra.apps.plugins.forms import PluginDataForm
+from orchestra.plugins.forms import PluginDataForm
 
 from .options import SoftwareService
 

orchestra/apps/saas/services/options.py

@@ -3,8 +3,8 @@ from django.core.exceptions import ValidationError
 from django.utils.safestring import mark_safe
 from django.utils.translation import ugettext_lazy as _
 
-from orchestra.apps import plugins
-from orchestra.apps.plugins.forms import PluginDataForm
+from orchestra import plugins
+from orchestra.plugins.forms import PluginDataForm
 from orchestra.core import validators
 from orchestra.forms import widgets
 from orchestra.utils.functional import cached
@@ -72,6 +72,7 @@ class SoftwareServiceForm(PluginDataForm):
             obj.set_password(self.cleaned_data["password1"])
         return obj
 
+
 class SoftwareService(plugins.Plugin):
     form = SoftwareServiceForm
     serializer = None

orchestra/apps/services/handlers.py

@@ -7,7 +7,7 @@ from django.contrib.contenttypes.models import ContentType
 from django.utils import timezone
 from django.utils.translation import ugettext_lazy as _
 
-from orchestra.apps import plugins
+from orchestra import plugins
 from orchestra.utils.humanize import text2int
 from orchestra.utils.python import AttrDict
 

orchestra/conf/base_settings.py

@@ -86,7 +86,6 @@ INSTALLED_APPS = (
     'orchestra.apps.miscellaneous',
     'orchestra.apps.bills',
     'orchestra.apps.payments',
-    'orchestra.apps.plugins',
     
     # Third-party apps
     'django_extensions',

orchestra/models/utils.py

@@ -47,3 +47,4 @@ def get_model_field_path(origin, target):
                 new_path = list(path)
                 new_path.append(field.name)
                 queue.append((new_model, new_path))
+    raise LookupError("Path does not exists between '%s' and '%s' models" % (origin, target))

orchestra/settings.py

@@ -31,3 +31,8 @@ API_ROOT_VIEW = getattr(settings, 'API_ROOT_VIEW', 'orchestra.api.root.APIRoot')
 
 
 ORCHESTRA_MIGRATION_MODE = getattr(settings, 'ORCHESTRA_MIGRATION_MODE', False)
+
+
+ORCHESTRA_DEFAULT_SUPPORT_FROM_EMAIL = getattr(settings, 'ORCHESTRA_DEFAULT_SUPPORT_FROM_EMAIL',
+    'support@orchestra.lan'
+)