some admin tweaks

manifests/ships/admin.py

@@ -10,6 +10,8 @@ class GoodInline(admin.TabularInline):
 
 class ShipAdmin(admin.ModelAdmin):
     inlines = [GoodInline]
+    list_filter = ('bill_type', 'manifest_file',)
+    list_display = ('__unicode__', 'bill_type', 'number', 'date', 'flag', 'captain', 'owner', 'port', 'country', 'no_of_goods',)
 
 class GoodAdmin(admin.ModelAdmin):
     pass

manifests/ships/models.py

@@ -8,10 +8,16 @@ class Manifest(models.Model):
   def __unicode__(self):
     return self.filename
 
+TYPE_CHOICES = (
+    ('Import', 'Import'),
+    ('Export', 'Export'),
+    ('Rexport', 'Rexport'),
+    )
+
 #['type', 'number', 'date', 'ship_name', 'captain', 'flag', 'trader', 'port', 'country']
 class Ship(models.Model):
   manifest_file = models.ForeignKey(Manifest)
-  bill_type = models.CharField(max_length=50)
+  bill_type = models.CharField(max_length=50, choices=TYPE_CHOICES)
   number = models.IntegerField(max_length=20)
   date = models.DateField()
   ship_name = models.CharField(max_length=255)
@@ -24,6 +30,12 @@ class Ship(models.Model):
   def __unicode__(self):
     return "%d: %s" % (self.number, self.ship_name,)
 
+  class Meta:
+    ordering = ['number']
+
+  def no_of_goods(self):
+    return Good.objects.filter(ship=self).count()
+
 #['description', 'package_type', 'no_of_packages', 'weight', 'value']
 class Good(models.Model):
   ship = models.ForeignKey(Ship)