From 5dd1623192d9cff3f6aedc8e11e270073d589c40 Mon Sep 17 00:00:00 2001
From: Moshe Nahmias <moshegrey@gmail.com>
Date: Sun, 9 Jul 2023 14:47:59 +0300
Subject: [PATCH] Alow Blueprint routes to explicitly define error_format
 (#2773)

Co-authored-by: Adam Hopkins <adam@amhopkins.com>
---
 sanic/blueprints.py      |  6 +++++-
 tests/test_errorpages.py | 22 ++++++++++++++++++++++
 2 files changed, 27 insertions(+), 1 deletion(-)

diff --git a/sanic/blueprints.py b/sanic/blueprints.py
index a52495b9..fc9408fe 100644
--- a/sanic/blueprints.py
+++ b/sanic/blueprints.py
@@ -319,6 +319,10 @@ class Blueprint(BaseSanic):
             # Prepend the blueprint URI prefix if available
             uri = self._setup_uri(future.uri, url_prefix)
 
+            route_error_format = (
+                future.error_format if future.error_format else error_format
+            )
+
             version_prefix = self.version_prefix
             for prefix in (
                 future.version_prefix,
@@ -358,7 +362,7 @@ class Blueprint(BaseSanic):
                 future.unquote,
                 future.static,
                 version_prefix,
-                error_format,
+                route_error_format,
                 future.route_context,
             )
 
diff --git a/tests/test_errorpages.py b/tests/test_errorpages.py
index a2df90b3..6c4334b7 100644
--- a/tests/test_errorpages.py
+++ b/tests/test_errorpages.py
@@ -2,6 +2,7 @@ import logging
 
 import pytest
 
+import sanic
 from sanic import Sanic
 from sanic.config import Config
 from sanic.errorpages import TextRenderer, exception_response, guess_mime
@@ -205,6 +206,27 @@ def test_route_error_response_from_explicit_format(app):
     assert response.content_type == "text/plain; charset=utf-8"
 
 
+def test_blueprint_error_response_from_explicit_format(app):
+    bp = sanic.Blueprint("MyBlueprint")
+
+    @bp.get("/text", error_format="json")
+    def text_response(request):
+        raise Exception("oops")
+        return text("Never gonna see this")
+
+    @bp.get("/json", error_format="text")
+    def json_response(request):
+        raise Exception("oops")
+        return json({"message": "Never gonna see this"})
+
+    app.blueprint(bp)
+    _, response = app.test_client.get("/text")
+    assert response.content_type == "application/json"
+
+    _, response = app.test_client.get("/json")
+    assert response.content_type == "text/plain; charset=utf-8"
+
+
 def test_unknown_fallback_format(app):
     with pytest.raises(SanicException, match="Unknown format: bad"):
         app.config.FALLBACK_ERROR_FORMAT = "bad"