From c43f1d011cef742c782750883df73eae2c25bd7e Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?LeandroJata=C3=AD?= <leandroroberto.br@gmail.com>
Date: Wed, 22 Oct 2025 12:40:10 -0300
Subject: [PATCH] feat: impl filtro m2m com lookup '__in' para buscas com
 multiplos ids (#3807)
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* feat: impl filtro m2m com lookup '__in' para buscas com multiplos ids

* fix: remove alteração na criação de rotas da api

A classe DrfautoapiRouter removida nesse commit bem como a alteração no classmethod router é uma aleração necessária para que a api rode no django 5.2. Por outro lado, esta alteração quebra os links gerados pela template tag url e exigiria refatoração das mesmas. Esta alteração não é necessária para o propósito do PR.
---
 drfautoapi/drfautoapi.py | 37 ++++++++++++++++++++++++++++++++-----
 1 file changed, 32 insertions(+), 5 deletions(-)

diff --git a/drfautoapi/drfautoapi.py b/drfautoapi/drfautoapi.py
index e0fd0c348..da5a3a736 100644
--- a/drfautoapi/drfautoapi.py
+++ b/drfautoapi/drfautoapi.py
@@ -1,20 +1,21 @@
 from collections import OrderedDict
+import django_filters
 import importlib
 import inspect
 import logging
 import re
 
-from django.apps.config import AppConfig
-from django.apps.registry import apps
 from django.conf import settings
 from django.contrib.postgres.fields.jsonb import JSONField
 from django.db.models.base import ModelBase
 from django.db.models.fields import TextField, CharField
 from django.db.models.fields.files import FileField
+from django.db.models.fields.related import ManyToManyField
 from django.template.defaultfilters import capfirst
 from django.utils.translation import ugettext_lazy as _
-import django_filters
+from django.urls.conf import path
 from django_filters.constants import ALL_FIELDS, EMPTY_VALUES
+from django_filters.fields import ModelMultipleChoiceField
 from django_filters.filters import CharFilter
 from django_filters.filterset import FilterSet
 from django_filters.rest_framework.backends import DjangoFilterBackend
@@ -23,6 +24,7 @@ from rest_framework import serializers as rest_serializers
 from rest_framework.response import Response
 from rest_framework.routers import DefaultRouter
 from rest_framework.viewsets import ModelViewSet
+from rest_framework.urlpatterns import format_suffix_patterns
 
 
 logger = logging.getLogger(__name__)
@@ -65,6 +67,21 @@ class SplitStringCharFilter(django_filters.CharFilter):
         return qs
 
 
+class M2MFilter(django_filters.ModelMultipleChoiceFilter):
+
+    class M2MFieldFormField(ModelMultipleChoiceField):
+        def clean(self, value):
+            if value in EMPTY_VALUES:
+                return super().clean(value)
+            values = list(map(lambda x: x.replace(' ', '').split(','), value))
+            values = [v for subvalues in values for v in subvalues]
+            cleaned_values = tuple(super().clean(values))
+            return (cleaned_values,) if cleaned_values else cleaned_values
+
+    field_class = M2MFieldFormField
+    distinct = True
+
+
 class ApiFilterSetMixin(FilterSet):
 
     o = CharFilter(method='filter_o')
@@ -117,7 +134,7 @@ class ApiFilterSetMixin(FilterSet):
                 f = model._meta.get_field(f_str)
 
                 if f.many_to_many:
-                    fields[f_str] = ['exact']
+                    fields[f_str] = ['exact', 'in', ]
                     continue
 
                 fields[f_str] = ['exact']
@@ -173,6 +190,14 @@ class ApiFilterSetMixin(FilterSet):
             return filter_class(**default)
         return None
 
+    @classmethod
+    def filter_for_lookup(cls, field, lookup_type):
+        f, p = super().filter_for_lookup(field, lookup_type)
+
+        if lookup_type == 'in' and isinstance(field, ManyToManyField):
+            return M2MFilter, p
+        return f, p
+
 
 class BusinessRulesNotImplementedMixin:
     http_method_names = ['get', 'head', 'options', 'trace']
@@ -208,7 +233,7 @@ class ApiViewSetConstrutor():
             importlib.import_module(m)
 
     @classmethod
-    def router(cls, router_class=DefaultRouter):
+    def router(cls, router_class = DefaultRouter):
         router = router_class()
         for app, built_sets in cls._built_sets.items():
             for model, viewset in built_sets.items():
@@ -407,3 +432,5 @@ class customize(object):
         ApiViewSetConstrutor._built_sets[
             self.model._meta.app_config][self.model] = _ApiViewSet
         return _ApiViewSet
+
+