trying to isolate bug in letter setting on ents

core/models/caves.py

@@ -64,20 +64,21 @@ class CaveAndEntrance(models.Model):
     entrances in one form.
     CASCADE means that if the cave or the entrance is deleted, then this CaveAndEntrance 
     is deleted too
+    NOT NEEDED anymore if we insist that cave:entrances have 1:n multiplicity.
     """
     cave = models.ForeignKey("Cave", on_delete=models.CASCADE)
     entrance = models.ForeignKey("Entrance", on_delete=models.CASCADE)
-    entrance_letter = models.CharField(max_length=20, blank=True, null=True)
+    entranceletter = models.CharField(max_length=20, blank=True, null=True)
 
     class Meta:
-        unique_together = [["cave", "entrance"], ["cave", "entrance_letter"]]
-        ordering = ["entrance_letter"]
+        unique_together = [["cave", "entrance"], ["cave", "entranceletter"]]
+        ordering = ["entranceletter"]
 
     def __str__(self):
-        return str(self.cave) + str(self.entrance_letter)
+        return str(self.cave) + str(self.entranceletter)
 
 # class CaveSlug(models.Model):
-# moved to models/logbooks.py to avoid cyclic import problem
+# moved to models/logbooks.py to avoid cyclic import problem. No I don't know why either.
 
 class Cave(TroggleModel):
     # too much here perhaps,
@@ -208,8 +209,8 @@ class Cave(TroggleModel):
         rs = []
         res = ""
         for e in CaveAndEntrance.objects.filter(cave=self):
-            if e.entrance_letter:
-                rs.append(e.entrance_letter)
+            if e.entranceletter:
+                rs.append(e.entranceletter)
         rs.sort()
         prevR = ""
         n = 0
@@ -246,7 +247,9 @@ class Cave(TroggleModel):
         return
 
     def file_output(self):
-        filepath = Path(os.path.join(settings.CAVEDESCRIPTIONS, self.filename))
+        """This produces the content which wll be re-saved as the cave_data html file.
+        """
+        filepath = Path(settings.CAVEDESCRIPTIONS, self.filename)
 
         t = loader.get_template("dataformat/cave.xml")
         now = datetime.now(timezone.utc)
@@ -306,7 +309,7 @@ class Entrance(TroggleModel):
     url = models.CharField(max_length=300, blank=True, null=True)
 
     class Meta:
-        ordering = ["caveandentrance__entrance_letter"]
+        ordering = ["caveandentrance__entranceletter"]
 
     def __str__(self):
         return str(self.slug)
@@ -325,6 +328,26 @@ class Entrance(TroggleModel):
             else:
                 return None
 
+    def singleletter(self):
+        """Used in template/dataformat/cave.xml to write out a replacement cave_data file
+        why is this not working?
+        """
+        cavelist = self.cavelist
+        try:
+            first = cavelist[0]
+            ce = CaveAndEntrance.objects.get(entrance=self, cave=first)
+        except:
+            # will fail if no caves in cavelist or if the cave isnt in the db
+            return "Z"
+        print(f"singleletter() access for first cave in {cavelist=}")
+        if ce.entranceletter == "":
+            print(f"### BLANK LETTER")
+            return "Y"
+        else:
+            letter = ce.entranceletter
+            print(f"### LETTER {letter}")
+        return letter
+        
     def exact_location(self):
         return self.single(self.exact_station)