Update api.py

api.py

@@ -123,6 +123,13 @@ class SummaryError(BaseModel):
     summaries: str = Field("", description="Empty string as summarizer encountered an error")
     summarizer_error: str = Field("Error: Summarizer Error with a message describing the error")
 
+class InputValidationError(BaseModel):
+    urls: List[str] = Field(..., description="List of URLs of news articles inputted by the user")
+    scraped_texts: str = Field("", description="Empty string as validation failed")
+    scrape_errors: str = Field("", description="Empty string as validation failed")
+    summaries: str = Field("", description="Empty string as validation failed")
+    summarizer_error: str = Field("Validation Error with a message describing the error")
+
 
 class NewsSummarizerAPIAuthenticationError(Exception):
     pass 
@@ -154,7 +161,8 @@ async def validation_exception_handler(request: Request, exc: RequestValidationE
 @app.post("/generate_summary/", tags=["Generate Summary"], response_model=List[SuccessfulResponse],
          responses={
         401: {"model": AuthenticationError, "description": "Authentication Error"}, 
-        500: {"model": SummaryError, "description": "Summarizer Error"}
+        500: {"model": SummaryError, "description": "Summarizer Error occurs when the API couldn't generate summary of even a single article"},
+        422: {"model": InputValidationError, "description": "Validation Error"}
          })
 async def generate_summary(q: URLList):
     """