Fix, Improve Indexing, Deleting Files (#840)

### Fix
- Fix degrade in speed when indexing large files
- Resolve org-mode indexing bug by splitting current section only once by heading
- Improve summarization by fixing formatting of text in indexed files

### Improve
- Improve scaling user, admin flows to delete all entries for a user

src/khoj/app/settings.py

@@ -112,7 +112,7 @@ ASGI_APPLICATION = "app.asgi.application"
 
 # Database
 # https://docs.djangoproject.com/en/4.2/ref/settings/#databases
-
+DATA_UPLOAD_MAX_NUMBER_FIELDS = 20000
 DATABASES = {
     "default": {
         "ENGINE": "django.db.backends.postgresql",

src/khoj/database/adapters/__init__.py

@@ -956,7 +956,7 @@ class FileObjectAdapters:
         return FileObject.objects.create(user=user, file_name=file_name, raw_text=raw_text)
 
     @staticmethod
-    def get_file_objects_by_name(user: KhojUser, file_name: str):
+    def get_file_object_by_name(user: KhojUser, file_name: str):
         return FileObject.objects.filter(user=user, file_name=file_name).first()
 
     @staticmethod
@@ -1012,27 +1012,35 @@ class EntryAdapters:
         return deleted_count
 
     @staticmethod
-    def delete_all_entries_by_type(user: KhojUser, file_type: str = None):
-        if file_type is None:
-            deleted_count, _ = Entry.objects.filter(user=user).delete()
-        else:
-            deleted_count, _ = Entry.objects.filter(user=user, file_type=file_type).delete()
+    def get_entries_by_batch(user: KhojUser, batch_size: int, file_type: str = None, file_source: str = None):
+        queryset = Entry.objects.filter(user=user)
+
+        if file_type is not None:
+            queryset = queryset.filter(file_type=file_type)
+
+        if file_source is not None:
+            queryset = queryset.filter(file_source=file_source)
+
+        while queryset.exists():
+            batch_ids = list(queryset.values_list("id", flat=True)[:batch_size])
+            yield Entry.objects.filter(id__in=batch_ids)
+
+    @staticmethod
+    def delete_all_entries(user: KhojUser, file_type: str = None, file_source: str = None, batch_size=1000):
+        deleted_count = 0
+        for batch in EntryAdapters.get_entries_by_batch(user, batch_size, file_type, file_source):
+            count, _ = batch.delete()
+            deleted_count += count
         return deleted_count
 
     @staticmethod
-    def delete_all_entries(user: KhojUser, file_source: str = None):
-        if file_source is None:
-            deleted_count, _ = Entry.objects.filter(user=user).delete()
-        else:
-            deleted_count, _ = Entry.objects.filter(user=user, file_source=file_source).delete()
+    async def adelete_all_entries(user: KhojUser, file_type: str = None, file_source: str = None, batch_size=1000):
+        deleted_count = 0
+        async for batch in EntryAdapters.get_entries_by_batch(user, batch_size, file_type, file_source):
+            count, _ = await batch.adelete()
+            deleted_count += count
         return deleted_count
 
-    @staticmethod
-    async def adelete_all_entries(user: KhojUser, file_source: str = None):
-        if file_source is None:
-            return await Entry.objects.filter(user=user).adelete()
-        return await Entry.objects.filter(user=user, file_source=file_source).adelete()
-
     @staticmethod
     def get_existing_entry_hashes_by_file(user: KhojUser, file_path: str):
         return Entry.objects.filter(user=user, file_path=file_path).values_list("hashed_value", flat=True)

src/khoj/database/admin.py

@@ -125,7 +125,10 @@ class EntryAdmin(admin.ModelAdmin):
         "file_path",
     )
     search_fields = ("id", "user__email", "user__username", "file_path")
-    list_filter = ("file_type",)
+    list_filter = (
+        "file_type",
+        "user__email",
+    )
     ordering = ("-created_at",)
 
 

src/khoj/interface/web/content_source_computer_input.html

@@ -12,7 +12,7 @@
         </h2>
         <div class="section-manage-files">
             <div id="delete-all-files" class="delete-all-files">
-                <button id="delete-all-files" type="submit" title="Remove all computer files from Khoj">🗑️ Delete all</button>
+                <button id="delete-all-files-button" type="submit" title="Remove all computer files from Khoj">🗑️ Delete all</button>
             </div>
             <div class="indexed-files">
             </div>
@@ -115,9 +115,13 @@
     // Get all currently indexed files on page load
     getAllComputerFilenames();
 
-    let deleteAllComputerFilesButton = document.getElementById("delete-all-files");
+    let deleteAllComputerFilesButton = document.getElementById("delete-all-files-button");
     deleteAllComputerFilesButton.addEventListener("click", function(event) {
         event.preventDefault();
+        originalDeleteAllComputerFilesButtonText = deleteAllComputerFilesButton.textContent;
+        deleteAllComputerFilesButton.textContent = "🗑️ Deleting...";
+        deleteAllComputerFilesButton.disabled = true;
+
         fetch('/api/config/data/content-source/computer', {
             method: 'DELETE',
             headers: {
@@ -125,11 +129,11 @@
             }
         })
         .then(response => response.json())
-        .then(data => {
-            if (data.status == "ok") {
-                getAllComputerFilenames();
-            }
-        })
+        .finally(() => {
+            getAllComputerFilenames();
+            deleteAllComputerFilesButton.textContent = originalDeleteAllComputerFilesButtonText;
+            deleteAllComputerFilesButton.disabled = false;
+        });
     });
 </script>
 {% endblock %}

src/khoj/processor/content/markdown/markdown_to_entries.py

@@ -146,7 +146,7 @@ class MarkdownToEntries(TextToEntries):
             else:
                 entry_filename = str(Path(raw_filename))
 
-            heading = parsed_entry.splitlines()[0] if re.search("^#+\s", parsed_entry) else ""
+            heading = parsed_entry.splitlines()[0] if re.search(r"^#+\s", parsed_entry) else ""
             # Append base filename to compiled entry for context to model
             # Increment heading level for heading entries and make filename as its top level heading
             prefix = f"# {entry_filename}\n#" if heading else f"# {entry_filename}\n"

src/khoj/processor/content/org_mode/org_to_entries.py

@@ -115,14 +115,20 @@ class OrgToEntries(TextToEntries):
             return entries, entry_to_file_map
 
         # Split this entry tree into sections by the next heading level in it
-        # Increment heading level until able to split entry into sections
+        # Increment heading level until able to split entry into sections or reach max heading level
         # A successful split will result in at least 2 sections
+        max_heading_level = 100
         next_heading_level = len(ancestry)
         sections: List[str] = []
-        while len(sections) < 2:
+        while len(sections) < 2 and next_heading_level < max_heading_level:
             next_heading_level += 1
             sections = re.split(rf"(\n|^)(?=[*]{{{next_heading_level}}} .+\n?)", org_content, flags=re.MULTILINE)
 
+        # If unable to split entry into sections, log error and skip indexing it
+        if next_heading_level == max_heading_level:
+            logger.error(f"Unable to split current entry chunk: {org_content_with_ancestry[:20]}. Skip indexing it.")
+            return entries, entry_to_file_map
+
         # Recurse down each non-empty section after parsing its body, heading and ancestry
         for section in sections:
             # Skip empty sections
@@ -135,7 +141,7 @@ class OrgToEntries(TextToEntries):
             # If first non-empty line is a heading with expected heading level
             if re.search(rf"^\*{{{next_heading_level}}}\s", first_non_empty_line):
                 # Extract the section body without the heading
-                current_section_body = "\n".join(section.split(first_non_empty_line)[1:])
+                current_section_body = "\n".join(section.split(first_non_empty_line, 1)[1:])
                 # Parse the section heading into current section ancestry
                 current_section_title = first_non_empty_line[next_heading_level:].strip()
                 current_ancestry[next_heading_level] = current_section_title

src/khoj/processor/content/text_to_entries.py

@@ -124,7 +124,7 @@ class TextToEntries(ABC):
         deletion_filenames: Set[str] = None,
         user: KhojUser = None,
         regenerate: bool = False,
-        file_to_text_map: dict[str, List[str]] = None,
+        file_to_text_map: dict[str, str] = None,
     ):
         with timer("Constructed current entry hashes in", logger):
             hashes_by_file = dict[str, set[str]]()
@@ -137,7 +137,7 @@ class TextToEntries(ABC):
         if regenerate:
             with timer("Cleared existing dataset for regeneration in", logger):
                 logger.debug(f"Deleting all entries for file type {file_type}")
-                num_deleted_entries = EntryAdapters.delete_all_entries_by_type(user, file_type)
+                num_deleted_entries = EntryAdapters.delete_all_entries(user, file_type=file_type)
 
         hashes_to_process = set()
         with timer("Identified entries to add to database in", logger):
@@ -192,16 +192,17 @@ class TextToEntries(ABC):
             logger.debug(f"Added {len(added_entries)} {file_type} entries to database")
 
         if file_to_text_map:
-            # get the list of file_names using added_entries
-            filenames_to_update = [entry.file_path for entry in added_entries]
-            # for each file_name in filenames_to_update, try getting the file object and updating raw_text and if it fails create a new file object
-            for file_name in filenames_to_update:
-                raw_text = " ".join(file_to_text_map[file_name])
-                file_object = FileObjectAdapters.get_file_objects_by_name(user, file_name)
-                if file_object:
-                    FileObjectAdapters.update_raw_text(file_object, raw_text)
-                else:
-                    FileObjectAdapters.create_file_object(user, file_name, raw_text)
+            with timer("Indexed text of modified file in", logger):
+                # get the set of modified files from added_entries
+                modified_files = {entry.file_path for entry in added_entries}
+                # create or update text of each updated file indexed on DB
+                for modified_file in modified_files:
+                    raw_text = file_to_text_map[modified_file]
+                    file_object = FileObjectAdapters.get_file_object_by_name(user, modified_file)
+                    if file_object:
+                        FileObjectAdapters.update_raw_text(file_object, raw_text)
+                    else:
+                        FileObjectAdapters.create_file_object(user, modified_file, raw_text)
 
         new_dates = []
         with timer("Indexed dates from added entries in", logger):

src/khoj/routers/api_config.py

@@ -183,7 +183,7 @@ async def remove_content_source_data(
         raise ValueError(f"Invalid content source: {content_source}")
     elif content_object != "Computer":
         await content_object.objects.filter(user=user).adelete()
-    await sync_to_async(EntryAdapters.delete_all_entries)(user, content_source)
+    await sync_to_async(EntryAdapters.delete_all_entries)(user, file_source=content_source)
 
     enabled_content = await sync_to_async(EntryAdapters.get_unique_file_types)(user)
     return {"status": "ok"}

tests/test_org_to_entries.py

@@ -1,5 +1,6 @@
 import os
 import re
+import time
 
 from khoj.processor.content.org_mode.org_to_entries import OrgToEntries
 from khoj.processor.content.text_to_entries import TextToEntries
@@ -41,6 +42,35 @@ def test_configure_indexing_heading_only_entries(tmp_path):
             assert is_none_or_empty(entries[1])
 
 
+def test_extract_entries_when_child_headings_have_same_prefix():
+    """Extract org entries from entries having child headings with same prefix.
+    Prevents regressions like the one fixed in PR #840.
+    """
+    # Arrange
+    tmp_path = "tests/data/org/same_prefix_headings.org"
+    entry: str = """
+** 1
+*** 1.1
+**** 1.1.2
+""".strip()
+    data = {
+        f"{tmp_path}": entry,
+    }
+
+    # Act
+    # Extract Entries from specified Org files
+    start = time.time()
+    entries = OrgToEntries.extract_org_entries(org_files=data, max_tokens=2)
+    end = time.time()
+    indexing_time = end - start
+
+    # Assert
+    explanation_msg = (
+        "It should not take more than 6 seconds to index. Entry extraction may have gone into an infinite loop."
+    )
+    assert indexing_time < 6 * len(entries), explanation_msg
+
+
 def test_entry_split_when_exceeds_max_tokens():
     "Ensure entries with compiled words exceeding max_tokens are split."
     # Arrange