♻️(backend) remove content from list serializer and introduce excerpt

Including the content field in the list view is not efficient as we need
to query the object storage to retrieve it. We want to display an excerpt
of the content on the list view so we should store it in database. We
let the frontend compute it and save it for us in the new "excerpt" field
because we are not supposed to have access to the content (E2EE feature coming)

src/backend/core/api/serializers.py

@@ -152,7 +152,6 @@ class Meta:
         model = models.Document
         fields = [
             "id",
-            "content",
             "created_at",
             "creator",
             "depth",
@@ -194,6 +193,7 @@ class Meta:
             "created_at",
             "creator",
             "depth",
+            "excerpt",
             "is_favorite",
             "link_role",
             "link_reach",

src/backend/core/factories.py

@@ -74,6 +74,7 @@ class Meta:
     parent = ParentNodeFactory()
 
     title = factory.Sequence(lambda n: f"document{n}")
+    excerpt = factory.Sequence(lambda n: f"excerpt{n}")
     content = factory.Sequence(lambda n: f"content{n}")
     creator = factory.SubFactory(UserFactory)
     link_reach = factory.fuzzy.FuzzyChoice(

src/backend/core/migrations/0015_add_document_excerpt.py

@@ -0,0 +1,23 @@
+# Generated by Django 5.1.4 on 2024-12-18 08:56
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('core', '0014_set_path_on_existing_documents'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='document',
+            name='excerpt',
+            field=models.TextField(blank=True, max_length=300, null=True, verbose_name='excerpt'),
+        ),
+        migrations.AlterField(
+            model_name='user',
+            name='language',
+            field=models.CharField(choices="(('en-us', 'English'), ('fr-fr', 'French'), ('de-de', 'German'))", default='en-us', help_text='The language in which the user wants to see the interface.', max_length=10, verbose_name='language'),
+        ),
+    ]

src/backend/core/models.py

@@ -326,6 +326,7 @@ class Document(MP_Node, BaseModel):
     """Pad document carrying the content."""
 
     title = models.CharField(_("title"), max_length=255, null=True, blank=True)
+    excerpt = models.TextField(_("excerpt"), max_length=300, null=True, blank=True)
     link_reach = models.CharField(
         max_length=20,
         choices=LinkReachChoices.choices,

src/backend/core/tests/documents/test_api_documents_children_create.py

@@ -2,7 +2,6 @@
 Tests for Documents API endpoint in impress's core app: create
 """
 
-import random
 from uuid import uuid4
 
 import pytest

src/backend/core/tests/documents/test_api_documents_list.py

@@ -59,7 +59,6 @@ def test_api_documents_list_format():
     assert len(results) == 1
     assert results[0] == {
         "id": str(document.id),
-        "content": document.content,
         "created_at": document.created_at.isoformat().replace("+00:00", "Z"),
         "creator": str(document.creator.id),
         "depth": 1,

src/backend/core/tests/documents/test_api_documents_retrieve.py

@@ -47,6 +47,7 @@ def test_api_documents_retrieve_anonymous_public_standalone():
         "created_at": document.created_at.isoformat().replace("+00:00", "Z"),
         "creator": str(document.creator.id),
         "depth": 1,
+        "excerpt": document.excerpt,
         "is_favorite": False,
         "link_reach": "public",
         "link_role": document.link_role,
@@ -99,6 +100,7 @@ def test_api_documents_retrieve_anonymous_public_parent():
         "created_at": document.created_at.isoformat().replace("+00:00", "Z"),
         "creator": str(document.creator.id),
         "depth": 3,
+        "excerpt": document.excerpt,
         "is_favorite": False,
         "link_reach": document.link_reach,
         "link_role": document.link_role,
@@ -184,6 +186,7 @@ def test_api_documents_retrieve_authenticated_unrelated_public_or_authenticated(
         "created_at": document.created_at.isoformat().replace("+00:00", "Z"),
         "creator": str(document.creator.id),
         "depth": 1,
+        "excerpt": document.excerpt,
         "is_favorite": False,
         "link_reach": reach,
         "link_role": document.link_role,
@@ -243,6 +246,7 @@ def test_api_documents_retrieve_authenticated_public_or_authenticated_parent(rea
         "created_at": document.created_at.isoformat().replace("+00:00", "Z"),
         "creator": str(document.creator.id),
         "depth": 3,
+        "excerpt": document.excerpt,
         "is_favorite": False,
         "link_reach": document.link_reach,
         "link_role": document.link_role,
@@ -350,6 +354,7 @@ def test_api_documents_retrieve_authenticated_related_direct():
         "creator": str(document.creator.id),
         "created_at": document.created_at.isoformat().replace("+00:00", "Z"),
         "depth": 1,
+        "excerpt": document.excerpt,
         "is_favorite": False,
         "link_reach": document.link_reach,
         "link_role": document.link_role,
@@ -409,6 +414,7 @@ def test_api_documents_retrieve_authenticated_related_parent():
         "creator": str(document.creator.id),
         "created_at": document.created_at.isoformat().replace("+00:00", "Z"),
         "depth": 3,
+        "excerpt": document.excerpt,
         "is_favorite": False,
         "link_reach": "restricted",
         "link_role": document.link_role,
@@ -558,6 +564,7 @@ def test_api_documents_retrieve_authenticated_related_team_members(
         "created_at": document.created_at.isoformat().replace("+00:00", "Z"),
         "creator": str(document.creator.id),
         "depth": 1,
+        "excerpt": document.excerpt,
         "is_favorite": False,
         "link_reach": "restricted",
         "link_role": document.link_role,
@@ -617,6 +624,7 @@ def test_api_documents_retrieve_authenticated_related_team_administrators(
         "created_at": document.created_at.isoformat().replace("+00:00", "Z"),
         "creator": str(document.creator.id),
         "depth": 1,
+        "excerpt": document.excerpt,
         "is_favorite": False,
         "link_reach": "restricted",
         "link_role": document.link_role,
@@ -677,6 +685,7 @@ def test_api_documents_retrieve_authenticated_related_team_owners(
         "created_at": document.created_at.isoformat().replace("+00:00", "Z"),
         "creator": str(document.creator.id),
         "depth": 1,
+        "excerpt": document.excerpt,
         "is_favorite": False,
         "link_reach": "restricted",
         "link_role": document.link_role,