agenda: don't authorized edition of patient for a periodic appointment

Fixes #2791

calebasse/agenda/forms.py

@@ -90,6 +90,21 @@ class NewAppointmentForm(BaseForm):
             appointment.services = [self.service]
         return appointment
 
+class UpdatePeriodicAppointmentForm(NewAppointmentForm):
+
+    def __init__(self, instance, service=None, **kwargs):
+        super(UpdatePeriodicAppointmentForm, self).__init__(instance,
+                service, **kwargs)
+        if instance and instance.pk:
+            self.fields['patient'].required = False
+            self.fields['patient'].widget.attrs['disabled'] = 'disabled'
+
+    def clean_patient(self):
+        instance = getattr(self, 'instance', None)
+        if instance:
+            return instance.patient
+        else:
+            return self.cleaned_data.get('patient', None)
 
 class UpdateAppointmentForm(NewAppointmentForm):
     class Meta(NewAppointmentForm.Meta):

calebasse/agenda/templates/agenda/appointment.html

@@ -49,8 +49,12 @@
            </td>
            <td {% if form.patient.field.required %}class="required"{% endif %}>
            <h4>{{ form.patient.label_tag }}</h4>
+           {% if object.exception_to and not object.exception_to.canceled %}
+           {{ object.patient }}
+           {% else %}
            {{ form.patient }}
            {{ form.patient.errors }}
+           {% endif %}
            </td>
            <td {% if form.act_type.field.required %}class="required"{% endif %}>
            <h4>{{ form.act_type.label_tag }}</h4>

calebasse/agenda/views.py

@@ -22,7 +22,7 @@ from calebasse.actes.models import Act, ValidationMessage
 from calebasse.actes.validation import (automated_validation, unlock_all_acts_of_the_day)
 from calebasse import cbv
 
-from forms import (NewAppointmentForm, NewEventForm,
+from forms import (NewAppointmentForm, NewEventForm, UpdatePeriodicAppointmentForm,
         UpdateAppointmentForm, UpdateEventForm, PeriodicEventsSearchForm)
 
 
@@ -184,14 +184,18 @@ class BaseAppointmentView(UpdateView):
 
 
 class UpdateAppointmentView(TodayOccurrenceMixin, BaseAppointmentView):
-    pass
+
+    def get_form_class(self):
+        if self.object.exception_to and not self.object.exception_to.canceled:
+            return UpdatePeriodicAppointmentForm
+        else:
+            return self.form_class
 
 
 class UpdatePeriodicAppointmentView(BaseAppointmentView):
     form_class = NewAppointmentForm
     template_name = 'agenda/new-appointment.html'
 
-
 class NewEventView(CreateView):
     model = Event
     form_class = NewEventForm