Merge pull request #512 from jaswilli/handle_error-doc

Update docs to reflect current handle_error argument names

AUTHORS.rst

@@ -50,3 +50,4 @@ Contributors (chronological)
 * Tim Gates `@timgates42 <https://github.com/timgates42>`_
 * Lefteris Karapetsas `@lefterisjp <https://github.com/lefterisjp>`_
 * Utku Gultopu `@ugultopu <https://github.com/ugultopu>`_
+* Jason Williams `@jaswilli <https://github.com/jaswilli>`_

docs/quickstart.rst

@@ -196,7 +196,7 @@ Then decorate that function with :func:`Parser.error_handler <webargs.core.Parse
 
 
     @parser.error_handler
-    def handle_error(error, req, schema, *, status_code, headers):
+    def handle_error(error, req, schema, *, error_status_code, error_headers):
         raise CustomError(error.messages)
 
 Parsing Lists in Query Strings

docs/upgrading.rst

@@ -308,6 +308,27 @@ prepared to traverse messages by one additional level. For example:
                 log.debug("bad value for '{}' [{}]: {}".format(field, location, messages))
 
 
+Custom Error Handler Argument Names Changed
+-------------------------------------------
+
+If you define a custom error handler via `@parser.error_handler` the function
+arguments are now keyword-only and `status_code` and `headers` have been renamed
+`error_status_code` and `error_headers`.
+
+.. code-block:: python
+
+    # webargs 5.x
+    @parser.error_handler
+    def custom_handle_error(error, req, schema, status_code, headers):
+        ...
+
+
+    # webargs 6.x
+    @parser.error_handler
+    def custom_handle_error(error, req, schema, *, error_status_code, error_headers):
+        ...
+
+
 Some Functions Take Keyword-Only Arguments Now
 ----------------------------------------------
 
@@ -325,7 +346,7 @@ the changes.
 
 
     # webargs 6.x
-    def handle_error(error, req, schema, *, status_code, headers):
+    def handle_error(error, req, schema, *, error_status_code, error_headers):
         ...
 
 `parser.__init__` methods:

src/webargs/core.py

@@ -434,7 +434,7 @@ class CustomError(Exception):
 
 
             @parser.error_handler
-            def handle_error(error, req, schema, *, status_code, headers):
+            def handle_error(error, req, schema, *, error_status_code, error_headers):
                 raise CustomError(error.messages)
 
         :param callable func: The error callback to register.