Refactor calculation of route grade

[climbing.kerkeslager.com] / src / climbing / models.py

diff --git a/src/climbing/models.py b/src/climbing/models.py
index 83d437f..dc1396a 100644 (file)
--- a/src/climbing/models.py
+++ b/src/climbing/models.py
@@ -41,7 +41,33 @@ class Route(models.Model):
     notes = models.TextField(blank=True, null=True)
 
     def __str__(self):
-        return self.name
+        pitch_count = self.pitches.count()
+
+        if pitch_count == 0:
+            return self.name
+
+        if pitch_count == 1:
+            return '{} {}'.format(self.name, self.difficulty)
+
+        return '{} {} ({} pitches)'.format(
+            self.name,
+            self.difficulty,
+            pitch_count,
+        )
+
+    @property
+    def difficulty(self):
+        diff = None
+        diff_index = -1
+
+        for pitch in self.pitches.all():
+            p_diff_index = _route_difficulty_index(pitch.difficulty)
+
+            if p_diff_index > diff_index:
+                diff_index = p_diff_index
+                diff = pitch.difficulty
+
+        return diff
 
 ROUTE_DIFFICULTY_CHOICES = (
     ('5.0', '5.0'),
@@ -85,6 +111,12 @@ ROUTE_DIFFICULTY_CHOICES = (
     ('5.15d', '5.15d'),
 )
 
+def _route_difficulty_index(difficulty):
+    for i, d in enumerate(ROUTE_DIFFICULTY_CHOICES):
+        if difficulty == d[0]:
+            return i
+    return -1
+
 SAFETY_CHOICES = (
     ('G', 'G'),
     ('PG', 'PG'),
@@ -99,11 +131,14 @@ class Pitch(models.Model):
         on_delete=models.CASCADE,
         related_name='pitches',
     )
-    name = models.CharField(max_length=64, null=True)
+    name = models.CharField(max_length=64, blank=True, null=True)
     difficulty = models.CharField(max_length=5, choices=ROUTE_DIFFICULTY_CHOICES)
     safety = models.CharField(max_length=4, choices=SAFETY_CHOICES)
     notes = models.TextField(blank=True, null=True)
 
+    class Meta:
+        verbose_name_plural = 'pitches'
+
     def __str__(self):
         if self.name:
             return '{} ({})'.format(self.name, self.difficulty)