Refatora api para incluir filtro via lookups passados por queryparams (#3445)

* isola filtro mixin para adição de lookups

* refatora api para filtrar com lookups

sapl/api/core/__init__.py

@@ -20,7 +20,7 @@ from rest_framework.response import Response
 from rest_framework.views import APIView
 from rest_framework.viewsets import ModelViewSet
 
-from sapl.api.forms import SaplFilterSetMixin
+from sapl.api.core.filters import SaplFilterSetMixin
 from sapl.api.permissions import SaplModelPermissions
 from sapl.api.serializers import ChoiceSerializer, ParlamentarSerializer,\
     ParlamentarEditSerializer, ParlamentarResumeSerializer
@@ -56,6 +56,7 @@ class SaplApiViewSetConstrutor():
         # Carrega todas as classes de sapl.api.serializers que possuam
         # "Serializer" como Sufixo.
         serializers_classes = inspect.getmembers(serializers)
+
         serializers_classes = {i[0]: i[1] for i in filter(
             lambda x: x[0].endswith('Serializer'),
             serializers_classes
@@ -82,7 +83,8 @@ class SaplApiViewSetConstrutor():
                 serializer_name, rest_serializers.ModelSerializer)
 
             # Caso Exista, pega a classe sapl.api.forms.{model}FilterSet
-            # ou utiliza a base definida em sapl.forms.SaplFilterSetMixin
+            # ou utiliza a base definida em
+            # sapl.api.core.filters.SaplFilterSetMixin
             filter_name = f'{object_name}FilterSet'
             _filterset_class = filters_classes.get(
                 filter_name, SaplFilterSetMixin)
@@ -127,7 +129,7 @@ class SaplApiViewSetConstrutor():
                     class Meta(_meta_filterset):
                         if not hasattr(_meta_filterset, 'model'):
                             model = _model
-
+                            
                 # Define uma classe padrão ModelViewSet de DRF
                 class ModelSaplViewSet(SaplApiViewSetConstrutor.SaplApiViewSet):
                     queryset = _model.objects.all()

sapl/api/core/filters.py

@@ -0,0 +1,105 @@
+
+from collections import OrderedDict
+
+from django.conf import settings
+from django.db.models.fields import DateTimeField, DateField
+from django.db.models.fields.files import FileField
+from django.template.defaultfilters import capfirst
+import django_filters
+from django_filters.constants import ALL_FIELDS
+from django_filters.filters import CharFilter
+from django_filters.filterset import BaseFilterSet, FilterSetMetaclass, \
+    FilterSet
+from django_filters.utils import resolve_field, get_all_model_fields
+
+
+class SaplFilterSetMixin(FilterSet):
+
+    o = CharFilter(method='filter_o')
+
+    class Meta:
+        fields = '__all__'
+        filter_overrides = {
+            FileField: {
+                'filter_class': django_filters.CharFilter,
+                'extra': lambda f: {
+                    'lookup_expr': 'exact',
+                },
+            },
+        }
+
+    def filter_o(self, queryset, name, value):
+        try:
+            return queryset.order_by(
+                *map(str.strip, value.split(',')))
+        except:
+            return queryset
+
+    @classmethod
+    def get_fields(cls):
+        model = cls._meta.model
+        fields_model = get_all_model_fields(model)
+        fields_filter = cls._meta.fields
+        exclude = cls._meta.exclude
+
+        if exclude is not None and fields_filter is None:
+            fields_filter = ALL_FIELDS
+
+        fields = fields_filter if isinstance(fields_filter, dict) else {}
+        if not isinstance(fields_filter, (dict, str)):
+            for f in fields_filter:
+                fields[f] = ['exact']
+
+        for f_str in fields_model:
+            if f_str not in fields:
+                f = model._meta.get_field(f_str)
+                fields[f_str] = []
+
+                def get_keys_lookups(cl, sub_f):
+                    r = []
+                    for lk, lv in cl.items():
+                        if lk == 'contained_by':
+                            continue
+                        sflk = f'{sub_f}{"__" if sub_f else ""}{lk}'
+                        r.append(sflk)
+
+                        if hasattr(lv, 'class_lookups'):
+                            r += get_keys_lookups(lv.class_lookups, sflk)
+
+                        if hasattr(lv, 'output_field'):
+                            r.append(f'{sflk}{"__" if sflk else ""}range')
+
+                            r += get_keys_lookups(lv.output_field.class_lookups, sflk)
+
+                    return r
+
+                fields[f_str] = list(
+                    set(get_keys_lookups(f.class_lookups, '')))
+
+        # Remove excluded fields
+        exclude = exclude or []
+
+        fields = [(f, lookups)
+                  for f, lookups in fields.items() if f not in exclude]
+
+        return OrderedDict(fields)
+
+    @classmethod
+    def filter_for_field(cls, f, name, lookup_expr='exact'):
+        # Redefine método estático para ignorar filtro para
+        # fields que não possuam lookup_expr informado
+
+        f, lookup_type = resolve_field(f, lookup_expr)
+
+        default = {
+            'field_name': name,
+            'label': capfirst(f.verbose_name),
+            'lookup_expr': lookup_expr
+        }
+
+        filter_class, params = cls.filter_for_lookup(
+            f, lookup_type)
+        default.update(params)
+        if filter_class is not None:
+            return filter_class(**default)
+        return None

sapl/api/forms.py

@@ -1,65 +1,8 @@
-from django.db.models.fields.files import FileField
-from django.template.defaultfilters import capfirst
-import django_filters
-from django_filters.filters import CharFilter, NumberFilter
-from django_filters.rest_framework.filterset import FilterSet
-from django_filters.utils import resolve_field
-from sapl.sessao.models import SessaoPlenaria
-
-
-class SaplFilterSetMixin(FilterSet):
-
-    o = CharFilter(method='filter_o')
-
-    class Meta:
-        fields = '__all__'
-        filter_overrides = {
-            FileField: {
-                'filter_class': django_filters.CharFilter,
-                'extra': lambda f: {
-                    'lookup_expr': 'exact',
-                },
-            },
-        }
-
-    def filter_o(self, queryset, name, value):
-        try:
-            return queryset.order_by(
-                *map(str.strip, value.split(',')))
-        except:
-            return queryset
 
-    @classmethod
-    def filter_for_field(cls, f, name, lookup_expr='exact'):
-        # Redefine método estático para ignorar filtro para
-        # fields que não possuam lookup_expr informado
-        f, lookup_type = resolve_field(f, lookup_expr)
-
-        default = {
-            'field_name': name,
-            'label': capfirst(f.verbose_name),
-            'lookup_expr': lookup_expr
-        }
-
-        filter_class, params = cls.filter_for_lookup(
-            f, lookup_type)
-        default.update(params)
-        if filter_class is not None:
-            return filter_class(**default)
-        return None
+from sapl.api.core.filters import SaplFilterSetMixin
+from sapl.sessao.models import SessaoPlenaria
 
 
 class SessaoPlenariaFilterSet(SaplFilterSetMixin):
-    year = NumberFilter(method='filter_year')
-    month = NumberFilter(method='filter_month')
-
     class Meta(SaplFilterSetMixin.Meta):
         model = SessaoPlenaria
-
-    def filter_year(self, queryset, name, value):
-        qs = queryset.filter(data_inicio__year=value)
-        return qs
-
-    def filter_month(self, queryset, name, value):
-        qs = queryset.filter(data_inicio__month=value)
-        return qs