From bf986e402f320a9de688e70c617416b05f39cd61 Mon Sep 17 00:00:00 2001
From: Christodoulos Tsoulloftas <chris@komposta.net>
Date: Mon, 24 Jun 2024 07:52:56 +0300
Subject: [PATCH] fix: Use ruff to enforce double quotes on patterns

---
 tests/formats/dataclass/test_filters.py | 4 ++--
 xsdata/formats/dataclass/filters.py     | 6 +-----
 2 files changed, 3 insertions(+), 7 deletions(-)

diff --git a/tests/formats/dataclass/test_filters.py b/tests/formats/dataclass/test_filters.py
index 42f870826..ebd10c60d 100644
--- a/tests/formats/dataclass/test_filters.py
+++ b/tests/formats/dataclass/test_filters.py
@@ -302,7 +302,7 @@ def test_field_definition_with_restriction_pattern(self, mock_field_default_valu
             "field(\n"
             "        default=None,\n"
             "        metadata={\n"
-            '            "pattern": r"([^\\ \\? > < \\* / \\" \\": |]{1,256})",\n'
+            '            "pattern": r\'([^\\ \\? > < \\* / " ": |]{1,256})\',\n'
             "        }\n"
             "    )"
         )
@@ -953,7 +953,7 @@ def test_format_metadata(self):
             '    "text": "foo",\n'
             '    "text_two": "fo\'o",\n'
             '    "text_three": "fo\\"o",\n'
-            '    "pattern": r"foo",\n'
+            "    \"pattern\": r'foo',\n"
             '    "custom": Telephone(country_code=30, area_code=123, number=4567),\n'
             '    "level_two": {\n'
             '        "a": 1,\n'
diff --git a/xsdata/formats/dataclass/filters.py b/xsdata/formats/dataclass/filters.py
index 5c711cede..32715c88f 100644
--- a/xsdata/formats/dataclass/filters.py
+++ b/xsdata/formats/dataclass/filters.py
@@ -40,7 +40,6 @@ class Filters:
 
     DEFAULT_KEY = "default"
     FACTORY_KEY = "default_factory"
-    UNESCAPED_DBL_QUOTE_REGEX = re.compile(r"([^\\])\"")
 
     __slots__ = (
         "substitutions",
@@ -569,10 +568,7 @@ def format_string(self, data: str, indent: int, key: str = "", pad: int = 0) ->
             return data
 
         if key == "pattern":
-            # escape double quotes because double quotes surround the regex string
-            # in the rendered output
-            value = self.UNESCAPED_DBL_QUOTE_REGEX.sub(r'\1\\"', data)
-            return f'r"{value}"'
+            return f"r{repr(data)}".replace("\\\\", "\\")
 
         if data == "":
             return '""'