Welcome Embeddings 🚀

.github/workflows/pythontest.yml

@@ -32,7 +32,10 @@ jobs:
       # Label used to access the service container
       postgres:
         # Docker Hub image
-        image: postgres:12
+        image: ghcr.io/learningequality/postgres:${{ github.base_ref || github.ref_name }}
+        credentials:
+          username: ${{ github.actor }}
+          password: ${{ secrets.GITHUB_TOKEN }}
         # Provide the password for postgres
         env:
           POSTGRES_USER: learningequality

contentcuration/contentcuration/management/commands/setup.py

@@ -4,11 +4,13 @@
 
 from django.core.management import call_command
 from django.core.management.base import BaseCommand
+from django.db import connection
 from django.db import Error as DBError
 from le_utils.constants import content_kinds
 from le_utils.constants import file_formats
 from le_utils.constants import format_presets
 from le_utils.constants import licenses
+from pgvector.django import VectorExtension
 
 from contentcuration.models import ContentNode
 from contentcuration.models import ContentTag
@@ -40,11 +42,20 @@
 SORT_ORDER = 0
 
 
+def enable_pgvector_extension(connection):
+    """
+    Enables pgvector extension in postgres.
+    """
+    with connection.cursor() as cursor:
+        cursor.execute("CREATE EXTENSION IF NOT EXISTS %s;" % VectorExtension().name)
+
+
 class Command(BaseCommand):
 
     def add_arguments(self, parser):
         parser.add_argument('--email', dest="email", default="a@a.com")
         parser.add_argument('--password', dest="password", default="a")
+        parser.add_argument('--clean-data-state', action='store_true', default=False, help='Sets database in clean state.')
 
     def handle(self, *args, **options):
         # Validate email
@@ -65,6 +76,9 @@ def handle(self, *args, **options):
         except DBError as e:
             logging.error('Error creating cache table: {}'.format(str(e)))
 
+        # Enable pgvector extension.
+        enable_pgvector_extension(connection)
+
         # Run migrations
         call_command('migrate')
 
@@ -79,67 +93,68 @@ def handle(self, *args, **options):
         user2 = create_user("user@b.com", "b", "User", "B")
         user3 = create_user("user@c.com", "c", "User", "C")
 
-        # Create channels
-
-        channel1 = create_channel("Published Channel", DESCRIPTION, editors=[admin], bookmarkers=[user1, user2], public=True)
-        channel2 = create_channel("Ricecooker Channel", DESCRIPTION, editors=[admin, user1], bookmarkers=[user2], viewers=[user3])
-        channel3 = create_channel("Empty Channel", editors=[user3], viewers=[user2])
-        channel4 = create_channel("Imported Channel", editors=[admin])
-
-        # Invite admin to channel 3
-        try:
-            invitation, _new = Invitation.objects.get_or_create(
-                invited=admin,
-                sender=user3,
-                channel=channel3,
-                email=admin.email,
-            )
-            invitation.share_mode = "edit"
-            invitation.save()
-        except MultipleObjectsReturned:
-            # we don't care, just continue
-            pass
-
-        # Create pool of tags
-        tags = []
-        for t in TAGS:
-            tag, _new = ContentTag.objects.get_or_create(tag_name=t, channel=channel1)
-
-        # Generate file objects
-        document_file = create_file("Sample Document", format_presets.DOCUMENT, file_formats.PDF, user=admin)
-        video_file = create_file("Sample Video", format_presets.VIDEO_HIGH_RES, file_formats.MP4, user=admin)
-        subtitle_file = create_file("Sample Subtitle", format_presets.VIDEO_SUBTITLE, file_formats.VTT, user=admin)
-        audio_file = create_file("Sample Audio", format_presets.AUDIO, file_formats.MP3, user=admin)
-        html5_file = create_file("Sample HTML", format_presets.HTML5_ZIP, file_formats.HTML5, user=admin)
-
-        # Populate channel 1 with content
-        generate_tree(channel1.main_tree, document_file, video_file, subtitle_file, audio_file, html5_file, user=admin, tags=tags)
-
-        # Populate channel 2 with staged content
-        channel2.ricecooker_version = "0.0.0"
-        channel2.save()
-        generate_tree(channel2.staging_tree, document_file, video_file, subtitle_file, audio_file, html5_file, user=admin, tags=tags)
-
-        # Import content from channel 1 into channel 4
-        channel1.main_tree.children.first().copy_to(channel4.main_tree)
-
-        # Get validation to be reflected in nodes properly
-        ContentNode.objects.all().update(complete=True)
-        call_command('mark_incomplete')
-
-        # Mark this node as incomplete even though it is complete
-        # for testing purposes
-        node = ContentNode.objects.get(tree_id=channel1.main_tree.tree_id, title="Sample Audio")
-        node.complete = False
-        node.save()
-
-        # Publish
-        publish_channel(admin.id, channel1.pk)
-
-        # Add nodes to clipboard in legacy way
-        legacy_clipboard_nodes = channel1.main_tree.get_children()
-        for legacy_node in legacy_clipboard_nodes:
-            legacy_node.copy_to(target=user1.clipboard_tree)
+        # Only create additional data when clean-data-state is False (i.e. default behaviour).
+        if options["clean_data_state"] is False:
+            # Create channels
+            channel1 = create_channel("Published Channel", DESCRIPTION, editors=[admin], bookmarkers=[user1, user2], public=True)
+            channel2 = create_channel("Ricecooker Channel", DESCRIPTION, editors=[admin, user1], bookmarkers=[user2], viewers=[user3])
+            channel3 = create_channel("Empty Channel", editors=[user3], viewers=[user2])
+            channel4 = create_channel("Imported Channel", editors=[admin])
+
+            # Invite admin to channel 3
+            try:
+                invitation, _new = Invitation.objects.get_or_create(
+                    invited=admin,
+                    sender=user3,
+                    channel=channel3,
+                    email=admin.email,
+                )
+                invitation.share_mode = "edit"
+                invitation.save()
+            except MultipleObjectsReturned:
+                # we don't care, just continue
+                pass
+
+            # Create pool of tags
+            tags = []
+            for t in TAGS:
+                tag, _new = ContentTag.objects.get_or_create(tag_name=t, channel=channel1)
+
+            # Generate file objects
+            document_file = create_file("Sample Document", format_presets.DOCUMENT, file_formats.PDF, user=admin)
+            video_file = create_file("Sample Video", format_presets.VIDEO_HIGH_RES, file_formats.MP4, user=admin)
+            subtitle_file = create_file("Sample Subtitle", format_presets.VIDEO_SUBTITLE, file_formats.VTT, user=admin)
+            audio_file = create_file("Sample Audio", format_presets.AUDIO, file_formats.MP3, user=admin)
+            html5_file = create_file("Sample HTML", format_presets.HTML5_ZIP, file_formats.HTML5, user=admin)
+
+            # Populate channel 1 with content
+            generate_tree(channel1.main_tree, document_file, video_file, subtitle_file, audio_file, html5_file, user=admin, tags=tags)
+
+            # Populate channel 2 with staged content
+            channel2.ricecooker_version = "0.0.0"
+            channel2.save()
+            generate_tree(channel2.staging_tree, document_file, video_file, subtitle_file, audio_file, html5_file, user=admin, tags=tags)
+
+            # Import content from channel 1 into channel 4
+            channel1.main_tree.children.first().copy_to(channel4.main_tree)
+
+            # Get validation to be reflected in nodes properly
+            ContentNode.objects.all().update(complete=True)
+            call_command('mark_incomplete')
+
+            # Mark this node as incomplete even though it is complete
+            # for testing purposes
+            node = ContentNode.objects.get(tree_id=channel1.main_tree.tree_id, title="Sample Audio")
+            node.complete = False
+            node.save()
+
+            # Publish
+            publish_channel(admin.id, channel1.pk)
+
+            # Add nodes to clipboard in legacy way
+            legacy_clipboard_nodes = channel1.main_tree.get_children()
+            for legacy_node in legacy_clipboard_nodes:
+                legacy_node.copy_to(target=user1.clipboard_tree)
 
         print("\n\n\nSETUP DONE: Log in as admin to view data (email: {}, password: {})\n\n\n".format(email, password))
 

contentcuration/contentcuration/migrations/0147_embeddings_embeddingscontentnode.py

@@ -0,0 +1,36 @@
+# Generated by Django 3.2.19 on 2023-11-08 09:55
+import uuid
+
+import django.db.models.deletion
+import pgvector.django
+from django.conf import settings
+from django.db import migrations
+from django.db import models
+
+import contentcuration.models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('contentcuration', '0146_drop_taskresult_fields'),
+    ]
+
+    operations = [
+        migrations.CreateModel(
+            name='EmbeddingsContentNode',
+            fields=[
+                ('cid', models.CharField(max_length=64, primary_key=True, serialize=False)),
+                ('contentnode', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='node_cid', to='contentcuration.contentnode')),
+            ],
+        ),
+        migrations.CreateModel(
+            name='Embeddings',
+            fields=[
+                ('embedding_id', contentcuration.models.UUIDField(default=uuid.uuid4, max_length=32, primary_key=True, serialize=False)),
+                ('model', models.CharField(db_index=True, max_length=64)),
+                ('embedding', pgvector.django.VectorField()),
+                ('embedded_node', models.ForeignKey(on_delete=django.db.models.deletion.CASCADE, related_name='embeddings', to='contentcuration.embeddingscontentnode')),
+            ],
+        ),
+    ]

contentcuration/contentcuration/models.py

@@ -57,6 +57,7 @@
 from mptt.models import MPTTModel
 from mptt.models import raise_if_unsaved
 from mptt.models import TreeForeignKey
+from pgvector.django import VectorField
 from postmark.core import PMMailInactiveRecipientException
 from postmark.core import PMMailUnauthorizedException
 from rest_framework.authtoken.models import Token
@@ -1983,6 +1984,24 @@ class Meta:
         ]
 
 
+class EmbeddingsContentNode(models.Model):
+    """
+    A model that stores the canonical contentnode for embedding purposes.
+    """
+    cid = models.CharField(primary_key=True, max_length=64)
+    contentnode = models.ForeignKey(ContentNode, related_name="node_cid", blank=False, null=False, on_delete=models.CASCADE)
+
+
+class Embeddings(models.Model):
+    """
+    A model that stores generated embeddings.
+    """
+    embedding_id = UUIDField(primary_key=True, default=uuid.uuid4)
+    model = models.CharField(max_length=64, db_index=True)
+    embedded_node = models.ForeignKey(EmbeddingsContentNode, related_name="embeddings", blank=False, null=False, on_delete=models.CASCADE)
+    embedding = VectorField()
+
+
 class ContentKind(models.Model):
     kind = models.CharField(primary_key=True, max_length=200, choices=content_kinds.choices)
 

contentcuration/contentcuration/test_settings.py

@@ -11,3 +11,5 @@
 INSTALLED_APPS += ("django_concurrent_tests",)  # noqa F405
 
 MANAGE_PY_PATH = "./contentcuration/manage.py"
+
+DATABASES["default"]["ENGINE"] = "contentcuration.tests.custom_pytest_db_backend" # noqa

contentcuration/contentcuration/tests/custom_pytest_db_backend/base.py

@@ -0,0 +1,34 @@
+from django.db.backends.postgresql.base import DatabaseWrapper as PostgresDatabaseWrapper
+from django.db.backends.postgresql.creation import DatabaseCreation as PostgresDatabaseCreation
+
+
+class CustomDBCreationForPytest(PostgresDatabaseCreation):
+    """
+    Overriding creation module to enable postgres pgvector extension before
+    pytest runs migration. Because embeddings table rely on pgvector
+    extension to work.
+    """
+
+    def _create_test_db(self, verbosity, autoclobber, keepdb=False):
+        from contentcuration.management.commands.setup import enable_pgvector_extension
+
+        # Create test database and get its name.
+        test_db_name = super()._create_test_db(verbosity, autoclobber, keepdb)
+
+        # Close current nodb_cursor connection and point connection to the
+        # newly created test database.
+        self.connection.close()
+        self.connection.settings_dict["NAME"] = test_db_name
+
+        # Enable pgvector extension.
+        enable_pgvector_extension(self.connection)
+
+        return self.connection.settings_dict["NAME"]
+
+
+class DatabaseWrapper(PostgresDatabaseWrapper):
+    """
+    A database wrapper to customise creation module. Rest everything is same as
+    Postgres.
+    """
+    creation_class = CustomDBCreationForPytest

contentcuration/contentcuration/tests/test_models.py

@@ -19,6 +19,8 @@
 from contentcuration.models import ChannelSet
 from contentcuration.models import ContentNode
 from contentcuration.models import CONTENTNODE_TREE_ID_CACHE_KEY
+from contentcuration.models import Embeddings
+from contentcuration.models import EmbeddingsContentNode
 from contentcuration.models import File
 from contentcuration.models import FILE_DURATION_CONSTRAINT
 from contentcuration.models import generate_object_storage_name
@@ -981,3 +983,50 @@ def test_prune(self):
         ChannelHistory.prune()
         self.assertEqual(2, ChannelHistory.objects.count())
         self.assertEqual(2, ChannelHistory.objects.filter(id__in=last_history_ids).count())
+
+
+class EmbeddingsTestCase(StudioTestCase):
+    persist_bucket = True
+
+    @classmethod
+    def setUpClass(cls):
+        super(EmbeddingsTestCase, cls).setUpClass()
+        cls.create_bucket()
+        node_1 = testdata.node({
+            "kind_id": "video",
+            "title": "first"
+        })
+        node_2 = testdata.node({
+            "kind_id": "video",
+            "title": "second"
+        })
+        node_3 = testdata.node({
+            "kind_id": "video",
+            "title": "third"
+        })
+
+        embedded_node_1 = EmbeddingsContentNode.objects.create(cid=node_1.content_id, contentnode=node_1)
+        embedded_node_2 = EmbeddingsContentNode.objects.create(cid=node_2.content_id, contentnode=node_2)
+        embedded_node_3 = EmbeddingsContentNode.objects.create(cid=node_3.content_id, contentnode=node_3)
+
+        # Two closely placed vectors i.e. they are similar.
+        Embeddings.objects.create(model="studio-embedder-v1.0", embedded_node=embedded_node_1, embedding=[2, 3])
+        Embeddings.objects.create(model="studio-embedder-v1.0", embedded_node=embedded_node_2, embedding=[2, 2])
+        # A vector placed at far distance i.e. not similar to above vectors.
+        Embeddings.objects.create(model="studio-embedder-v1.0", embedded_node=embedded_node_3, embedding=[4, 1])
+
+    @classmethod
+    def tearDownClass(cls):
+        super(EmbeddingsTestCase, cls).tearDownClass()
+        cls.delete_bucket()
+
+    def test_can_create_embeddings(self):
+        embeddings_count = Embeddings.objects.count()
+        self.assertEqual(embeddings_count, 3)
+
+    def test_get_nearest_neighbors(self):
+        from pgvector.django import L2Distance
+        import numpy as np
+        # Get the nearest neighbor of [2, 3] which is [2, 2].
+        closest_embedding = list(Embeddings.objects.order_by(L2Distance('embedding', [2, 3]))[1:2])[0]
+        self.assertTrue(np.array_equal(closest_embedding.embedding, np.array([2, 2])))

docs/host_services_setup.md

@@ -130,7 +130,7 @@ yarn run services
 ```
 
 ## Initializing Studio
-With the services running, in a separate terminal/terminal-tab, we can now initialize the database for Studio development purposes. The command below will initialize the database, in addition to adding a user account for development:
+With the services running, in a separate terminal/terminal-tab, we can now initialize the database for Studio development purposes. The command below will initialize the database then it will enable the required postgres extensions in addition to adding a user account for development:
 ```bash
 yarn run devsetup
 ```

docs/local_dev_docker.md

@@ -92,7 +92,7 @@ make dcservicesdown
 ```
 
 ## Initializing Studio
-With the services running, in a separate terminal/terminal-tab, we can now initialize the database for Studio development purposes. The command below will initialize the database tables, import constants, and a user account for development:
+With the services running, in a separate terminal/terminal-tab, we can now initialize the database for Studio development purposes. The command below will initialize the database tables, import constants, enable required postgres extensions and a studio user account for development:
 ```bash
 yarn run devsetup
 ```

package.json

@@ -15,7 +15,8 @@
     "build": "webpack --env prod --config webpack.config.js",
     "postgres": "pg_ctl -D /usr/local/var/postgresql@9.6 start || true",
     "redis": "redis-server /usr/local/etc/redis.conf || true",
-    "devsetup": "cd contentcuration && python manage.py setup --settings=contentcuration.dev_settings",
+    "devsetup": "python contentcuration/manage.py setup --settings=contentcuration.dev_settings",
+    "devsetup:clean": "python contentcuration/manage.py setup --clean-data-state --settings=contentcuration.dev_settings",
     "services": "npm-run-all -c --parallel --silent celery minio redis postgres",
     "test": "jest --config jest_config/jest.conf.js",
     "build:dev": "webpack serve --env dev --config webpack.config.js --progress",

requirements.in

@@ -35,3 +35,4 @@ pillow==10.2.0
 python-dateutil>=2.8.1
 jsonschema>=3.2.0
 django-celery-results
+pgvector