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-rw-r--r--archaeological_operations/models.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/archaeological_operations/models.py b/archaeological_operations/models.py
index e711def95..162692e20 100644
--- a/archaeological_operations/models.py
+++ b/archaeological_operations/models.py
@@ -266,6 +266,7 @@ class ArchaeologicalSite(BaseHistorizedItem, OwnPerms, ValueGetter,
blank=True)
main_image = models.ForeignKey(
Document, related_name='main_image_sites',
+ on_delete=models.SET_NULL,
verbose_name=_(u"Main image"), blank=True, null=True)
cached_label = models.TextField(_(u"Cached name"),
null=True, blank=True, db_index=True)
@@ -853,6 +854,7 @@ class Operation(ClosedItem, BaseHistorizedItem, OwnPerms, ValueGetter,
blank=True)
main_image = models.ForeignKey(
Document, related_name='main_image_operations',
+ on_delete=models.SET_NULL,
verbose_name=_(u"Main image"), blank=True, null=True)
cached_label = models.CharField(_(u"Cached name"), max_length=500,
null=True, blank=True, db_index=True)