ForeignKey: SET_NULL fix

1 files changed, 10 insertions, 3 deletions

diff --git a/archaeological_context_records/models.py b/archaeological_context_records/models.py
index 72b355ac9..56d43e295 100644
--- a/archaeological_context_records/models.py
+++ b/archaeological_context_records/models.py
@@ -66,8 +66,10 @@ class Dating(models.Model):
     start_date = models.IntegerField(_(u"Start date"), blank=True, null=True)
     end_date = models.IntegerField(_(u"End date"), blank=True, null=True)
     dating_type = models.ForeignKey(DatingType, verbose_name=_(u"Dating type"),
+                                    on_delete=models.SET_NULL,
                                     blank=True, null=True)
     quality = models.ForeignKey(DatingQuality, verbose_name=_(u"Quality"),
+                                on_delete=models.SET_NULL,
                                 blank=True, null=True)
     precise_dating = models.TextField(_(u"Precise dating"), blank=True,
                                       null=True)
@@ -177,7 +179,7 @@ class Unit(GeneralType):
     order = models.IntegerField(_(u"Order"))
     parent = models.ForeignKey(
         "Unit", verbose_name=_(u"Parent context record type"),
-        blank=True, null=True)
+        on_delete=models.SET_NULL, blank=True, null=True)
 
     class Meta:
         verbose_name = _(u"Context record Type")
@@ -403,14 +405,15 @@ class ContextRecord(BulkUpdatedItem, BaseHistorizedItem,
         _(u"External ID is set automatically"), default=False)
     parcel = models.ForeignKey(
         Parcel, verbose_name=_(u"Parcel"), related_name='context_record',
-        blank=True, null=True)
+        on_delete=models.SET_NULL, blank=True, null=True)
     town = models.ForeignKey(
         Town, verbose_name=_(u"Town"), related_name='context_record',
-        blank=True, null=True)
+        on_delete=models.SET_NULL, blank=True, null=True)
     operation = models.ForeignKey(Operation, verbose_name=_(u"Operation"),
                                   related_name='context_record')
     archaeological_site = models.ForeignKey(
         ArchaeologicalSite, verbose_name=_(u"Archaeological site"),
+        on_delete=models.SET_NULL,
         blank=True, null=True, related_name='context_records')
     label = models.CharField(_(u"ID"), max_length=200)
     description = models.TextField(_(u"Description"), blank=True, null=True)
@@ -435,6 +438,7 @@ class ContextRecord(BulkUpdatedItem, BaseHistorizedItem,
     datings_comment = models.TextField(_(u"Comment on datings"), blank=True,
                                        null=True)
     unit = models.ForeignKey(Unit, verbose_name=_(u"Context record type"),
+                             on_delete=models.SET_NULL,
                              related_name='+', blank=True, null=True)
     filling = models.TextField(_(u"Filling"), blank=True, null=True)
     interpretation = models.TextField(_(u"Interpretation"), blank=True,
@@ -455,11 +459,14 @@ class ContextRecord(BulkUpdatedItem, BaseHistorizedItem,
         help_text=_(u"Estimation of a \"Terminus Post Quem\""))
     identification = models.ForeignKey(
         IdentificationType, blank=True, null=True,
+        on_delete=models.SET_NULL,
         verbose_name=_(u"Identification"),)
     activity = models.ForeignKey(ActivityType, blank=True, null=True,
+                                 on_delete=models.SET_NULL,
                                  verbose_name=_(u"Activity"),)
     excavation_technic = models.ForeignKey(
         ExcavationTechnicType, blank=True, null=True,
+        on_delete=models.SET_NULL,
         verbose_name=_(u"Excavation technique"))
     related_context_records = models.ManyToManyField(
         'ContextRecord', through='RecordRelations', blank=True)