add timeline information to the /items endpoint

core/inventory/models.py

@@ -7,11 +7,14 @@ from django_softdelete.models import SoftDeleteModel, SoftDeleteManager
 class ItemManager(SoftDeleteManager):
 
     def create(self, **kwargs):
+        container = kwargs.pop('container')
         if 'uid_deprecated' in kwargs:
             raise ValueError('uid_deprecated must not be set manually')
         uid_deprecated = Item.all_objects.filter(event=kwargs['event']).count() + 1
         kwargs['uid_deprecated'] = uid_deprecated
-        return super().create(**kwargs)
+        item = super().create(**kwargs)
+        item.container = container
+        return item
 
     def get_queryset(self):
         return super().get_queryset().filter(returned_at__isnull=True)
@@ -22,18 +25,28 @@ class Item(SoftDeleteModel):
     uid_deprecated = models.IntegerField()
     description = models.TextField()
     event = models.ForeignKey('Event', models.CASCADE)
-    container = models.ForeignKey('Container', models.CASCADE)
     returned_at = models.DateTimeField(blank=True, null=True)
     created_at = models.DateTimeField(null=True, auto_now_add=True)
     updated_at = models.DateTimeField(blank=True, null=True)
 
+    @property
+    def container(self):
+        try:
+            return self.container_history.order_by('-timestamp').first().container
+        except AttributeError:
+            return None
+
+    @container.setter
+    def container(self, value):
+        if self.container == value:
+            return
+        self.container_history.create(container=value)
+
     @property
     def related_issues(self):
         groups = groupby(self.issue_relation_changes.all(), lambda rel: rel.issue_thread.id)
         return [sorted(v, key=lambda r: r.timestamp)[0].issue_thread for k, v in groups]
 
-
-
     objects = ItemManager()
     all_objects = models.Manager()
 
@@ -53,10 +66,35 @@ class Container(SoftDeleteModel):
     created_at = models.DateTimeField(blank=True, null=True)
     updated_at = models.DateTimeField(blank=True, null=True)
 
+    @property
+    def items(self):
+        try:
+            history = self.item_history.order_by('-timestamp').all()
+            return [v for k, v in groupby(history, key=lambda item: item.item.id)]
+        except AttributeError:
+            return []
+
     def __str__(self):
         return '[' + str(self.id) + ']' + self.name
 
 
+class ItemPlacement(models.Model):
+    id = models.AutoField(primary_key=True)
+    item = models.ForeignKey('Item', models.CASCADE, related_name='container_history')
+    container = models.ForeignKey('Container', models.CASCADE, related_name='item_history')
+    timestamp = models.DateTimeField(auto_now_add=True)
+
+
+class Comment(models.Model):
+    id = models.AutoField(primary_key=True)
+    item = models.ForeignKey(Item, on_delete=models.CASCADE, related_name='comments')
+    comment = models.TextField()
+    timestamp = models.DateTimeField(auto_now_add=True)
+
+    def __str__(self):
+        return str(self.issue_thread) + ' comment #' + str(self.id)
+
+
 class Event(models.Model):
     id = models.AutoField(primary_key=True)
     name = models.CharField(max_length=255)
@@ -72,4 +110,4 @@ class Event(models.Model):
         return '[' + str(self.slug) + ']' + self.name
 
     class Meta:
-        db_table = 'common_event'
+        db_table = 'common_event'