Fixing Data Annotation Issues

When uploading datasets, the code uses a `bulk_create` to upload
Examples and Labels. It then filters the data from the database
based on when it was created. However, [Django doesn't enforce
the list order when calling filter](https://stackoverflow.com/questions/7163640/what-is-the-default-order-of-a-list-returned-from-a-django-filter-call)
unless ordering is specified. The previous behavior mismatched labels
and examples. When this was shown in the UI, the data would show labels
for incorrect examples (i.e. a label for message #2 would be shown on
message #1). This fix enforces that the data is returned in the order
it was inserted so that the data, label pair is as expected.

backend/api/models.py

@@ -1,6 +1,8 @@
 import string
 from typing import Literal
 
+from django import db
+
 from auto_labeling_pipeline.models import RequestModelFactory
 from django.contrib.auth.models import User
 from django.core.exceptions import ValidationError
@@ -92,7 +94,7 @@ class ImageClassificationProject(Project):
 
 
 class Label(models.Model):
-    text = models.CharField(max_length=100)
+    text = models.CharField(max_length=100, db_index=True)
     prefix_key = models.CharField(
         max_length=10,
         blank=True,
@@ -118,7 +120,7 @@ class Label(models.Model):
     )
     background_color = models.CharField(max_length=7, default='#209cee')
     text_color = models.CharField(max_length=7, default='#ffffff')
-    created_at = models.DateTimeField(auto_now_add=True)
+    created_at = models.DateTimeField(auto_now_add=True, db_index=True)
     updated_at = models.DateTimeField(auto_now=True)
 
     def __str__(self):
@@ -143,6 +145,7 @@ class Label(models.Model):
         unique_together = (
             ('project', 'text'),
         )
+        ordering = ['created_at']
 
 
 class Example(models.Model):
@@ -160,13 +163,16 @@ class Example(models.Model):
         blank=True
     )
     text = models.TextField(null=True, blank=True)
-    created_at = models.DateTimeField(auto_now_add=True)
+    created_at = models.DateTimeField(auto_now_add=True, db_index=True)
     updated_at = models.DateTimeField(auto_now=True)
 
     @property
     def comment_count(self):
         return Comment.objects.filter(example=self.id).count()
 
+    class Meta:
+        ordering = ['created_at']
+
 
 class ExampleState(models.Model):
     example = models.ForeignKey(
@@ -196,7 +202,7 @@ class Comment(models.Model):
         on_delete=models.CASCADE,
         null=True
     )
-    created_at = models.DateTimeField(auto_now_add=True)
+    created_at = models.DateTimeField(auto_now_add=True, db_index=True)
     updated_at = models.DateTimeField(auto_now=True)
 
     @property
@@ -204,7 +210,7 @@ class Comment(models.Model):
         return self.user.username
 
     class Meta:
-        ordering = ('-created_at', )
+        ordering = ['created_at']
 
 
 class Tag(models.Model):

backend/api/tasks.py

@@ -1,7 +1,8 @@
 import datetime
 import itertools
 
-from celery import shared_task
+from celery import shared_task 
+from celery.utils.log import get_task_logger
 from django.conf import settings
 from django.contrib.auth import get_user_model
 from django.shortcuts import get_object_or_404
@@ -14,7 +15,7 @@ from .views.upload.factory import (get_data_class, get_dataset_class,
                                    get_label_class)
 from .views.upload.utils import append_field
 
-
+logger = get_task_logger(__name__)
 class Buffer:
 
     def __init__(self, buffer_size=settings.IMPORT_BATCH_SIZE):
@@ -82,6 +83,7 @@ class DataFactory:
     def create(self, examples, user, project):
         self.create_label(examples, project)
         ids = self.create_data(examples, project)
+        logger.debug(f'IDS {[ids[i].text for i in range(15)]}')
         self.create_annotation(examples, ids, user, project)
 
 
@@ -120,6 +122,7 @@ def injest_data(user_id, project_id, filenames, format: str, **kwargs):
             factory.create(buffer.data, user, project)
             buffer.clear()
     if not buffer.is_empty():
+        logger.debug(f'BUFFER LEN {len(buffer)}')
         factory.create(buffer.data, user, project)
         buffer.clear()