abstracted the next prev links into utils so now they work for every

model that implements a get_%S_admin_link method and loads the JS

2 files changed, 21 insertions, 3 deletions

diff --git a/app/sightings/admin.py b/app/sightings/admin.py
index 9cd0fef..433d465 100644
--- a/app/sightings/admin.py
+++ b/app/sightings/admin.py
@@ -46,3 +46,7 @@ class SightingAdmin(OSMGeoAdmin):
     map_height = 425
     map_template = 'gis/admin/osm.html'
     openlayers_url = '/static/admin/js/OpenLayers.js'
+
+    class Media:
+        js = ('next-prev-links.js',)
+
diff --git a/app/sightings/models.py b/app/sightings/models.py
index 96e0b5e..792c52b 100644
--- a/app/sightings/models.py
+++ b/app/sightings/models.py
@@ -1,5 +1,6 @@
 import datetime
 from django.urls import reverse
+from django.apps import apps
 from django.template.defaultfilters import slugify
 from django.contrib.gis.db import models
 from django.contrib.auth.models import User
@@ -82,14 +83,14 @@ class Sighting(models.Model):
     ap = models.ForeignKey(AP, on_delete=models.CASCADE)
     point = models.PointField(blank=True)
     location = models.ForeignKey(Location, on_delete=models.CASCADE, blank=True)
-    date = models.DateTimeField('Date', default=timezone.now)
+    pub_date = models.DateTimeField('Date', default=timezone.now)
     seen_by = models.ManyToManyField(User)
     images = models.ManyToManyField(LuxImage, blank=True)
     #audio = models.ManyToManyField(BirdAudio, blank=True)
 
     class Meta:
-        ordering = ["-date", ]
-        get_latest_by = "date"
+        ordering = ["-pub_date", ]
+        get_latest_by = "pub_date"
 
     @property
     def state(self):
@@ -113,6 +114,19 @@ class Sighting(models.Model):
         '''Get the site's latitude.'''
         return self.point.y
 
+    @property
+    def get_previous_admin_url(self):
+        n = self.get_previous_by_pub_date()
+        return reverse('admin:%s_%s_change' %(self._meta.app_label,  self._meta.model_name),  args=[n.id] )
+
+    @property
+    def get_next_admin_url(self):
+        model = apps.get_model(app_label=self._meta.app_label, model_name=self._meta.model_name)
+        try:
+            return reverse('admin:%s_%s_change' %(self._meta.app_label,  self._meta.model_name),  args=[self.get_next_by_pub_date().pk] )
+        except model.DoesNotExist:
+            return ''
+
     def get_small_image(self):
         for img in self.images.all():
             for size in img.sizes.all():