Allow CorpContact.corporation being null

stages/migrations/0009_corpcontact_corp_nullable.py

@@ -0,0 +1,16 @@
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('stages', '0008_add_logbook'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='corpcontact',
+            name='corporation',
+            field=models.ForeignKey(blank=True, null=True, on_delete=models.deletion.CASCADE, to='stages.Corporation', verbose_name='Institution'),
+        ),
+    ]

stages/models.py

@@ -311,7 +311,10 @@ class Corporation(models.Model):
 
 
 class CorpContact(models.Model):
-    corporation = models.ForeignKey(Corporation, verbose_name='Institution', on_delete=models.CASCADE)
+    corporation = models.ForeignKey(
+        Corporation, verbose_name='Institution', null=True, blank=True,
+        on_delete=models.CASCADE
+    )
     ext_id = models.IntegerField(null=True, blank=True, verbose_name='ID externe')
     is_main = models.BooleanField(default=False, verbose_name='Contact principal')
     always_cc = models.BooleanField(default=False, verbose_name='Toujours en copie')
@@ -328,7 +331,7 @@ class CorpContact(models.Model):
         verbose_name = "Contact"
 
     def __str__(self):
-        return '{0} {1}, {2}'.format(self.last_name, self.first_name, self.corporation)
+        return '{0} {1}, {2}'.format(self.last_name, self.first_name, self.corporation or '-')
 
 
 class Domain(models.Model):

stages/views.py

@@ -751,7 +751,8 @@ def stages_export(request, scope=None):
         (c, {s: [] for s in section_names})
         for c in Corporation.objects.all().values_list('name', flat=True)
     )
-    for contact in CorpContact.objects.all().select_related('corporation'
+    for contact in CorpContact.objects.filter(corporation__isnull=False
+            ).select_related('corporation'
             ).prefetch_related('sections').order_by('corporation'):
         for section in contact.sections.all():
             if not default_contacts[contact.corporation.name][section.name] or contact.is_main is True: