From 33ea606f455f195d74f09ac654e03da8850ecb9b Mon Sep 17 00:00:00 2001
From: Ricardo Reis <ricardo.luis.reis@gmail.com>
Date: Sat, 3 Jun 2023 20:56:17 -0300
Subject: [PATCH] Update youtube.py - Fix metadata validation error in
 YoutubeLoader (#5479)

This commit addresses a ValueError occurring when the YoutubeLoader
class tries to add datetime metadata from a YouTube video's publish
date. The error was happening because the ChromaDB metadata validation
only accepts str, int, or float data types.

In the `_get_video_info` method of the `YoutubeLoader` class, the
publish date retrieved from the YouTube video was of datetime type. This
commit fixes the issue by converting the datetime object to a string
before adding it to the metadata dictionary.

Additionally, this commit introduces error handling in the
`_get_video_info` method to ensure that all metadata fields have valid
values. If a metadata field is found to be None, a default value is
assigned. This prevents potential errors during metadata validation when
metadata fields are None.

The file modified in this commit is youtube.py.

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---------

Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>
---
 langchain/document_loaders/youtube.py | 16 +++++++++-------
 1 file changed, 9 insertions(+), 7 deletions(-)

diff --git a/langchain/document_loaders/youtube.py b/langchain/document_loaders/youtube.py
index c506454b..9960411c 100644
--- a/langchain/document_loaders/youtube.py
+++ b/langchain/document_loaders/youtube.py
@@ -231,13 +231,15 @@ class YoutubeLoader(BaseLoader):
             )
         yt = YouTube(f"https://www.youtube.com/watch?v={self.video_id}")
         video_info = {
-            "title": yt.title,
-            "description": yt.description,
-            "view_count": yt.views,
-            "thumbnail_url": yt.thumbnail_url,
-            "publish_date": yt.publish_date,
-            "length": yt.length,
-            "author": yt.author,
+            "title": yt.title or "Unknown",
+            "description": yt.description or "Unknown",
+            "view_count": yt.views or 0,
+            "thumbnail_url": yt.thumbnail_url or "Unknown",
+            "publish_date": yt.publish_date.strftime("%Y-%m-%d %H:%M:%S")
+            if yt.publish_date
+            else "Unknown",
+            "length": yt.length or 0,
+            "author": yt.author or "Unknown",
         }
         return video_info