Updates to make 2018 blog merge work (faster)

core/models/survex.py

@@ -171,7 +171,8 @@ class Wallet(models.Model):
     '''
     fpath               = models.CharField(max_length=200)
     walletname          = models.CharField(max_length=200)
-    
+    walletdate          = models.DateField(blank=True, null=True)
+   
     class Meta:
         ordering = ('walletname',)
     
@@ -238,6 +239,8 @@ class Wallet(models.Model):
 
     # Yes this is horribly, horribly inefficient, esp. for a page that have date, people and cave in it
     def date(self):
+        if self.walletdate:
+            return self.walletdate
         if not self.get_json():
             return None
         jsondata = self.get_json()
@@ -254,7 +257,9 @@ class Wallet(models.Model):
                     samedate = datetime.date.fromisoformat(datestr[:10])
                 except:
                     samedate = None
-            return samedate.isoformat()
+            self.walletdate = samedate.isoformat()
+            self.save()
+            return self.walletdate
         
     def people(self):
         if not self.get_json():