Ref model, backend e frontend de TipoProposicao

sapl/api/forms.py

@@ -1,25 +1,15 @@
-from django.contrib.contenttypes.fields import GenericRel
 from django.db.models import Q
 from django_filters.filters import MethodFilter, ModelChoiceFilter
 from rest_framework.filters import FilterSet
 
-from sapl.base.forms import autores_models_generic_relations
 from sapl.base.models import Autor, TipoAutor
-from sapl.utils import SaplGenericRelation
+from sapl.utils import generic_relations_for_model
 
 
-class AutorChoiceFilterSet(FilterSet):
+class SaplGenericRelationSearchFilterSet(FilterSet):
     q = MethodFilter()
-    tipo = ModelChoiceFilter(queryset=TipoAutor.objects.all())
-
-    class Meta:
-        model = Autor
-        fields = ['q',
-                  'tipo',
-                  'nome', ]
 
     def filter_q(self, queryset, value):
-
         query = value.split(' ')
         if query:
             q = Q()
@@ -30,11 +20,11 @@ class AutorChoiceFilterSet(FilterSet):
 
                 order_by = []
 
-                for gr in autores_models_generic_relations():
+                for gr in generic_relations_for_model(self._meta.model):
                     model = gr[0]
                     sgr = gr[1]
                     for item in sgr:
-                        if item.related_model != Autor:
+                        if item.related_model != self._meta.model:
                             continue
                         flag_order_by = True
                         for field in item.fields_search:
@@ -55,3 +45,14 @@ class AutorChoiceFilterSet(FilterSet):
                 queryset = queryset.filter(q).order_by(*order_by)
 
         return queryset
+
+
+class AutorChoiceFilterSet(SaplGenericRelationSearchFilterSet):
+    q = MethodFilter()
+    tipo = ModelChoiceFilter(queryset=TipoAutor.objects.all())
+
+    class Meta:
+        model = Autor
+        fields = ['q',
+                  'tipo',
+                  'nome', ]

sapl/api/serializers.py

@@ -16,10 +16,16 @@ class ChoiceSerializer(serializers.Serializer):
         return obj[0]
 
 
-class AutorChoiceSerializer(ChoiceSerializer):
+class ModelChoiceSerializer(ChoiceSerializer):
 
     def get_text(self, obj):
-        return obj.nome
+        return str(obj)
+
+    def get_value(self, obj):
+        return obj.id
+
+
+class AutorChoiceSerializer(ModelChoiceSerializer):
 
     def get_value(self, obj):
         return obj.id

sapl/api/urls.py

@@ -2,7 +2,7 @@
 from django.conf import settings
 from django.conf.urls import url, include
 
-from sapl.api.views import AutorListView
+from sapl.api.views import AutorListView, ModelChoiceView
 
 from .apps import AppConfig
 
@@ -16,9 +16,12 @@ app_name = AppConfig.name
 
 urlpatterns_api = [
     # url(r'^$', api_root),
-    url(r'^autor',
-        AutorListView.as_view(),
-        name='autor_list'),
+    url(r'^autor', AutorListView.as_view(), name='autor_list'),
+
+    url(r'^model/(?P<content_type>\d+)$',
+        ModelChoiceView.as_view(), name='model_list'),
+
+
 ]
 
 if settings.DEBUG:

sapl/api/views.py

@@ -1,4 +1,5 @@
 
+from django.contrib.contenttypes.models import ContentType
 from django.db.models import Q
 from django.http import Http404
 from django.utils.translation import ugettext_lazy as _
@@ -10,11 +11,28 @@ from rest_framework.viewsets import ModelViewSet
 
 from sapl.api.forms import AutorChoiceFilterSet
 from sapl.api.serializers import ChoiceSerializer, AutorSerializer,\
-    AutorChoiceSerializer
+    AutorChoiceSerializer, ModelChoiceSerializer
 from sapl.base.models import Autor, TipoAutor
 from sapl.utils import SaplGenericRelation, sapl_logger
 
 
+class ModelChoiceView(ListAPIView):
+
+    # FIXME aplicar permissão correta de usuário
+    permission_classes = (AllowAny,)
+    serializer_class = ModelChoiceSerializer
+
+    def get_queryset(self):
+
+        try:
+            ct = ContentType.objects.get_for_id(self.kwargs['content_type'])
+
+        except:
+            raise Http404
+
+        return ct.model_class().objects.all()
+
+
 class AutorListView(ListAPIView):
     """
     Listagem de Autores com filtro para autores já cadastrados
@@ -60,7 +78,6 @@ class AutorListView(ListAPIView):
 
     # FIXME aplicar permissão correta de usuário
     permission_classes = (AllowAny,)
-    serializer_class = AutorSerializer
     queryset = Autor.objects.all()
     model = Autor
 

sapl/base/forms.py

@@ -27,7 +27,8 @@ from sapl.sessao.models import SessaoPlenaria
 from sapl.settings import MAX_IMAGE_UPLOAD_SIZE
 from sapl.utils import (RANGE_ANOS, ImageThumbnailFileInput,
                         RangeWidgetOverride, autor_label, autor_modal,
-                        SaplGenericRelation)
+                        SaplGenericRelation, models_with_gr_for_model,
+                        ChoiceWithoutValidationField)
 
 from .models import AppConfig, CasaLegislativa
 
@@ -55,31 +56,6 @@ STATUS_USER_CHOICE = [
 ]
 
 
-def autores_models_generic_relations():
-    models_of_generic_relations = list(map(
-        lambda x: x.related_model,
-        filter(
-            lambda obj: obj.is_relation and
-            hasattr(obj, 'field') and
-            isinstance(obj, GenericRel),
-
-            Autor._meta.get_fields(include_hidden=True))
-    ))
-
-    models = list(map(
-        lambda x: (x,
-                   list(filter(
-                       lambda field: (
-                           isinstance(
-                               field, SaplGenericRelation) and
-                           field.related_model == Autor),
-                       x._meta.get_fields(include_hidden=True)))),
-        models_of_generic_relations
-    ))
-
-    return models
-
-
 class TipoAutorForm(ModelForm):
 
     content_type = forms.ModelChoiceField(
@@ -96,32 +72,14 @@ class TipoAutorForm(ModelForm):
 
         super(TipoAutorForm, self).__init__(*args, **kwargs)
 
-        # Models que apontaram uma GenericRelation com Autor
-        models_of_generic_relations = list(map(
-            lambda x: x.related_model,
-            filter(
-                lambda obj: obj.is_relation and
-                hasattr(obj, 'field') and
-                isinstance(obj, GenericRel),
-                Autor._meta.get_fields(include_hidden=True))
-        ))
-
         content_types = ContentType.objects.get_for_models(
-            *models_of_generic_relations)
+            *models_with_gr_for_model(Autor))
 
         self.fields['content_type'].choices = [
             ('', _('Outros (Especifique)'))] + [
                 (ct.pk, ct) for key, ct in content_types.items()]
 
 
-class ChoiceWithoutValidationField(forms.ChoiceField):
-
-    def validate(self, value):
-        if self.required and not value:
-            raise ValidationError(
-                self.error_messages['required'], code='required')
-
-
 class AutorForm(ModelForm):
     senha = forms.CharField(
         max_length=20,

sapl/materia/forms.py

@@ -2,23 +2,29 @@ from datetime import datetime
 
 import django_filters
 from crispy_forms.helper import FormHelper
-from crispy_forms.layout import HTML, Button, Column, Fieldset, Layout
+from crispy_forms.layout import HTML, Button, Column, Fieldset, Layout, Row,\
+    Div, Field
 from django import forms
+from django.contrib.contenttypes.fields import GenericRel
+from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import ObjectDoesNotExist, ValidationError
-from django.db import models
+from django.db import models, transaction
 from django.db.models import Max
 from django.forms import ModelForm
 from django.utils.translation import ugettext_lazy as _
 
 from sapl.base.models import Autor
 from sapl.comissoes.models import Comissao
-from sapl.crispy_layout_mixin import form_actions, to_row
+from sapl.crispy_layout_mixin import form_actions, to_row, to_column,\
+    SaplFormLayout
+from sapl.materia.models import TipoProposicao
 from sapl.norma.models import (LegislacaoCitada, NormaJuridica,
                                TipoNormaJuridica)
 from sapl.parlamentares.models import Parlamentar
 from sapl.settings import MAX_DOC_UPLOAD_SIZE
 from sapl.utils import (RANGE_ANOS, RangeWidgetOverride, autor_label,
-                        autor_modal)
+                        autor_modal, models_with_gr_for_model,
+                        ChoiceWithoutValidationField)
 
 from .models import (AcompanhamentoMateria, Anexada, Autoria,
                      DespachoInicial, DocumentoAcessorio, MateriaLegislativa,
@@ -767,3 +773,80 @@ class TramitacaoEmLoteFilterSet(django_filters.FilterSet):
         self.form.helper.layout = Layout(
             Fieldset(_('Tramitação em Lote'),
                      row1, row2, form_actions(save_label='Pesquisar')))
+
+
+class TipoProposicaoForm(ModelForm):
+
+    conteudo = forms.ModelChoiceField(
+        queryset=ContentType.objects.all(),
+        label=TipoProposicao._meta.get_field('conteudo').verbose_name,
+        required=True)
+
+    tipo_conteudo_related_radio = ChoiceWithoutValidationField(
+        label="Seleção de Tipo",
+        required=True,
+        widget=forms.RadioSelect())
+
+    tipo_conteudo_related = forms.IntegerField(
+        widget=forms.HiddenInput())
+
+    class Meta:
+        model = TipoProposicao
+        fields = ['descricao',
+                  'conteudo',
+                  'tipo_conteudo_related_radio',
+                  'tipo_conteudo_related']
+
+        widgets = {'tipo_conteudo_related': forms.HiddenInput()}
+
+    def __init__(self, *args, **kwargs):
+
+        tipo_select = Row(to_column(('descricao', 5)),
+                          to_column(('conteudo', 7)),
+                          to_column(('tipo_conteudo_related_radio', 12)))
+
+        self.helper = FormHelper()
+        self.helper.layout = SaplFormLayout(tipo_select)
+
+        super(TipoProposicaoForm, self).__init__(*args, **kwargs)
+
+        content_types = ContentType.objects.get_for_models(
+            *models_with_gr_for_model(TipoProposicao))
+
+        self.fields['conteudo'].choices = [
+            (ct.pk, ct) for k, ct in content_types.items()]
+        self.fields['conteudo'].choices.sort(key=lambda x: str(x[1]))
+
+        if self.instance.pk:
+            self.fields[
+                'tipo_conteudo_related'].initial = self.instance.object_id
+
+    def clean(self):
+        cd = self.cleaned_data
+
+        conteudo = cd['conteudo']
+
+        if 'tipo_conteudo_related' not in cd or not cd['tipo_conteudo_related']:
+            raise ValidationError(
+                _('Seleção de Tipo não definida'))
+
+        if not conteudo.model_class().objects.filter(
+                pk=cd['tipo_conteudo_related']).exists():
+            raise ValidationError(
+                _('O Registro definido (%s) não está na base de %s.'
+                  ) % (cd['tipo_conteudo_related'], cd['q'], conteudo))
+
+        return self.cleaned_data
+
+    @transaction.atomic
+    def save(self, commit=False):
+        tipo_proposicao = super(TipoProposicaoForm, self).save(commit)
+
+        assert tipo_proposicao.conteudo
+
+        tipo_proposicao.tipo_conteudo_related = \
+            tipo_proposicao.conteudo.model_class(
+            ).objects.get(pk=self.cleaned_data['tipo_conteudo_related'])
+
+        tipo_proposicao.save()
+        return tipo_proposicao

sapl/materia/migrations/0057_auto_20161016_0156.py

@@ -0,0 +1,38 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.7 on 2016-10-16 03:56
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('contenttypes', '0002_remove_content_type_name'),
+        ('materia', '0056_merge'),
+    ]
+
+    operations = [
+        migrations.RemoveField(
+            model_name='tipoproposicao',
+            name='materia_ou_documento',
+        ),
+        migrations.RemoveField(
+            model_name='tipoproposicao',
+            name='modelo',
+        ),
+        migrations.RemoveField(
+            model_name='tipoproposicao',
+            name='tipo_documento',
+        ),
+        migrations.RemoveField(
+            model_name='tipoproposicao',
+            name='tipo_materia',
+        ),
+        migrations.AddField(
+            model_name='tipoproposicao',
+            name='conteudo',
+            field=models.ForeignKey(default=None, on_delete=django.db.models.deletion.CASCADE, to='contenttypes.ContentType', verbose_name='Conteúdo'),
+        ),
+    ]

sapl/materia/migrations/0058_auto_20161016_0329.py

@@ -0,0 +1,26 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.9.7 on 2016-10-16 05:29
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import django.db.models.deletion
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('materia', '0057_auto_20161016_0156'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='tipoproposicao',
+            name='object_id',
+            field=models.PositiveIntegerField(blank=True, default=None, null=True),
+        ),
+        migrations.AlterField(
+            model_name='tipoproposicao',
+            name='conteudo',
+            field=models.ForeignKey(default=None, on_delete=django.db.models.deletion.CASCADE, to='contenttypes.ContentType', verbose_name='Definição de Tipo'),
+        ),
+    ]

sapl/materia/models.py

@@ -1,4 +1,6 @@
 from django.contrib.auth.models import Group
+from django.contrib.contenttypes.fields import GenericForeignKey
+from django.contrib.contenttypes.models import ContentType
 from django.db import models
 from django.utils.translation import ugettext_lazy as _
 from model_utils import Choices
@@ -8,7 +10,8 @@ from sapl.comissoes.models import Comissao
 from sapl.parlamentares.models import Parlamentar
 from sapl.utils import (RANGE_ANOS, YES_NO_CHOICES,
                         get_settings_auth_user_model,
-                        restringe_tipos_de_arquivo_txt)
+                        restringe_tipos_de_arquivo_txt, SaplGenericRelation,
+                        SaplGenericForeignKey)
 
 
 EM_TRAMITACAO = [(1, 'Sim'),
@@ -23,6 +26,38 @@ def grupo_autor():
     return grupo.id
 
 
+class TipoProposicao(models.Model):
+    descricao = models.CharField(max_length=50, verbose_name=_('Descrição'))
+
+    conteudo = models.ForeignKey(ContentType, default=None,
+                                 verbose_name=_('Definição de Tipo'))
+    object_id = models.PositiveIntegerField(
+        blank=True, null=True, default=None)
+    tipo_conteudo_related = SaplGenericForeignKey(
+        'conteudo', 'object_id', verbose_name=_('Seleção de Tipo'))
+
+    """materia_ou_documento = models.CharField(
+        max_length=1, verbose_name=_('Gera'), choices=MAT_OU_DOC_CHOICES)
+    modelo = models.CharField(max_length=50, verbose_name=_('Modelo XML'))
+
+    # mutually exclusive (depend on materia_ou_documento)
+    tipo_materia = models.ForeignKey(
+        TipoMateriaLegislativa,
+        blank=True,
+        null=True,
+        verbose_name=_('Tipo de Matéria'))
+    tipo_documento = models.ForeignKey(
+        TipoDocumento, blank=True, null=True,
+        verbose_name=_('Tipo de Documento'))"""
+
+    class Meta:
+        verbose_name = _('Tipo de Proposição')
+        verbose_name_plural = _('Tipos de Proposições')
+
+    def __str__(self):
+        return self.descricao
+
+
 class TipoMateriaLegislativa(models.Model):
     sigla = models.CharField(max_length=5, verbose_name=_('Sigla'))
     descricao = models.CharField(max_length=50, verbose_name=_('Descrição '))
@@ -31,6 +66,14 @@ class TipoMateriaLegislativa(models.Model):
     # XXX o que é isso ?
     quorum_minimo_votacao = models.PositiveIntegerField(blank=True, null=True)
 
+    tipo_proposicao = SaplGenericRelation(
+        TipoProposicao,
+        related_query_name='tipomaterialegislativa_set',
+        fields_search=(
+            ('descricao', '__icontains'),
+            ('sigla', '__icontains')
+        ))
+
     class Meta:
         verbose_name = _('Tipo de Matéria Legislativa')
         verbose_name_plural = _('Tipos de Matérias Legislativas')
@@ -246,6 +289,13 @@ class TipoDocumento(models.Model):
     descricao = models.CharField(
         max_length=50, verbose_name=_('Tipo Documento'))
 
+    tipo_proposicao = SaplGenericRelation(
+        TipoProposicao,
+        related_query_name='tipodocumento_set',
+        fields_search=(
+            ('descricao', '__icontains'),
+        ))
+
     class Meta:
         verbose_name = _('Tipo de Documento')
         verbose_name_plural = _('Tipos de Documento')
@@ -398,32 +448,6 @@ class Parecer(models.Model):
         }
 
 
-class TipoProposicao(models.Model):
-    MAT_OU_DOC_CHOICES = Choices(('M', 'materia', _('Matéria')),
-                                 ('D', 'documento', _('Documento')))
-
-    descricao = models.CharField(max_length=50, verbose_name=_('Descrição'))
-    materia_ou_documento = models.CharField(
-        max_length=1, verbose_name=_('Gera'), choices=MAT_OU_DOC_CHOICES)
-    modelo = models.CharField(max_length=50, verbose_name=_('Modelo XML'))
-
-    # mutually exclusive (depend on materia_ou_documento)
-    tipo_materia = models.ForeignKey(
-        TipoMateriaLegislativa,
-        blank=True,
-        null=True,
-        verbose_name=_('Tipo Matéria'))
-    tipo_documento = models.ForeignKey(
-        TipoDocumento, blank=True, null=True, verbose_name=_('Tipo Documento'))
-
-    class Meta:
-        verbose_name = _('Tipo de Proposição')
-        verbose_name_plural = _('Tipos de Proposições')
-
-    def __str__(self):
-        return self.descricao
-
-
 class Proposicao(models.Model):
     autor = models.ForeignKey(Autor, null=True, blank=True)
     tipo = models.ForeignKey(TipoProposicao, verbose_name=_('Tipo'))

sapl/materia/views.py

@@ -29,7 +29,8 @@ from sapl.crud.base import (ACTION_CREATE, ACTION_DELETE, ACTION_DETAIL,
                             Crud, CrudAux, CrudDetailView, MasterDetailCrud,
                             make_pagination)
 from sapl.materia import apps
-from sapl.materia.forms import AnexadaForm, LegislacaoCitadaForm
+from sapl.materia.forms import AnexadaForm, LegislacaoCitadaForm,\
+    TipoProposicaoForm
 from sapl.norma.models import LegislacaoCitada
 from sapl.utils import (TURNO_TRAMITACAO_CHOICES, YES_NO_CHOICES, autor_label,
                         autor_modal, gerar_hash_arquivo, get_base_url,
@@ -125,11 +126,26 @@ class ConfirmarEmailView(TemplateView):
 
 
 OrgaoCrud = CrudAux.build(Orgao, 'orgao')
-TipoProposicaoCrud = CrudAux.build(TipoProposicao, 'tipo_proposicao')
 StatusTramitacaoCrud = CrudAux.build(StatusTramitacao, 'status_tramitacao')
 UnidadeTramitacaoCrud = CrudAux.build(UnidadeTramitacao, 'unidade_tramitacao')
 
 
+class TipoProposicaoCrud(CrudAux):
+    model = TipoProposicao
+    help_text = 'tipo_proposicao'
+
+    class BaseMixin(CrudAux.BaseMixin):
+        list_field_names = ["descricao", "conteudo", 'tipo_conteudo_related']
+
+    class CreateView(CrudAux.CreateView):
+        form_class = TipoProposicaoForm
+        layout_key = None
+
+    class UpdateView(CrudAux.UpdateView):
+        form_class = TipoProposicaoForm
+        layout_key = None
+
+
 def criar_materia_proposicao(proposicao):
     tipo_materia = TipoMateriaLegislativa.objects.get(
         descricao=proposicao.tipo.descricao)

sapl/templates/materia/autor_form.html

@@ -1,6 +0,0 @@
-{% extends "base.html" %}
-{% load i18n crispy_forms_tags %}
-
-{% block base_content %}
-  {% crispy form helper %}
-{% endblock %}

sapl/templates/materia/layouts.yaml

@@ -74,9 +74,10 @@ Relatoria:
 
 TipoProposicao:
   {% trans 'Tipo Proposição' %}:
-  - descricao
-  - materia_ou_documento  tipo_documento
-  - modelo
+  - descricao conteudo
+  - tipo_conteudo_related
+
+
 
 ProposicaoCreate:
   {% trans 'Proposição' %}:

sapl/templates/materia/tipoproposicao_form.html

@@ -0,0 +1,36 @@
+{% extends "crud/form.html" %}
+{% load i18n %}
+aaa
+{% block extra_js %}
+
+<script type="text/javascript">
+
+$(document).ready(function(){
+  var initial_select = $("input[name=tipo_conteudo_related]").val();
+  $("input[name=tipo_conteudo_related]").remove();
+  $('#id_conteudo').change(function(event) {
+    var pk = this[event.target.selectedIndex].value;
+
+    var url = '{% url 'sapl.api:model_list' 0 %}'
+    url = url.replace('0', pk)
+
+    $.get(url).done(function(data) {
+      var radios = $("#div_id_tipo_conteudo_related_radio .controls").html('');
+      data.models.forEach(function (val, index) {
+        var html_radio = '<label class="radio'+(initial_select==val.value?' checked':'')+'"><span class="icons"><span class="first-icon"></span><span class="second-icon"></span></span><input type="radio" name="tipo_conteudo_related" id="id_tipo_conteudo_related_'+index+'" value="'+val.value+'"'+(initial_select?' checked="checked"':'')+'>'+val.text+'</label>';
+        radios.append(html_radio);
+      });
+      initial_select='';
+
+
+
+    });
+  });
+  $('#id_conteudo').trigger('change');
+
+});
+
+
+</script>
+
+{% endblock %}

sapl/utils.py

@@ -13,13 +13,15 @@ from django.conf import settings
 from django.contrib import admin
 from django.contrib.auth.decorators import user_passes_test
 from django.contrib.auth.models import Permission
-from django.contrib.contenttypes.fields import GenericRelation
+from django.contrib.contenttypes.fields import GenericRelation, GenericRel,\
+    GenericForeignKey
 from django.contrib.contenttypes.models import ContentType
 from django.core.exceptions import PermissionDenied, ValidationError
 from django.utils.translation import ugettext_lazy as _
 from floppyforms import ClearableFileInput
-from sapl.crispy_layout_mixin import SaplFormLayout, form_actions, to_row
 import magic
+
+from sapl.crispy_layout_mixin import SaplFormLayout, form_actions, to_row
 from sapl.settings import BASE_DIR
 
 
@@ -95,6 +97,13 @@ def montar_helper_autor(self):
              ' class="btn btn-inverse">Cancelar</a>')]))
 
 
+class SaplGenericForeignKey(GenericForeignKey):
+
+    def __init__(self, ct_field='content_type', fk_field='object_id', for_concrete_model=True, verbose_name=''):
+        super().__init__(ct_field, fk_field, for_concrete_model)
+        self.verbose_name = verbose_name
+
+
 class SaplGenericRelation(GenericRelation):
     """
     Extenção da class GenericRelation para implmentar o atributo fields_search
@@ -462,3 +471,52 @@ def gerar_hash_arquivo(arquivo, pk, block_size=2**20):
             break
         md5.update(data)
     return 'P' + md5.hexdigest() + '/' + pk
+
+
+class ChoiceWithoutValidationField(forms.ChoiceField):
+
+    def validate(self, value):
+        if self.required and not value:
+            raise ValidationError(
+                self.error_messages['required'], code='required')
+
+
+def models_with_gr_for_model(model):
+    return list(map(
+        lambda x: x.related_model,
+        filter(
+            lambda obj: obj.is_relation and
+            hasattr(obj, 'field') and
+            isinstance(obj, GenericRel),
+
+            model._meta.get_fields(include_hidden=True))
+    ))
+
+
+def generic_relations_for_model(model):
+    """
+    Esta função retorna uma lista de tuplas de dois elementos, onde o primeiro
+    elemento é um model qualquer que implementa SaplGenericRelation (SGR), o 
+    segundo elemento é uma lista de todas as SGR's que pode haver dentro do
+    model retornado na primeira posição da tupla.
+
+    Exemplo: No Sapl, o model Parlamentar tem apenas uma SGR para Autor. 
+                Se no Sapl existisse apenas essa SGR, o resultado dessa função
+                seria:
+                    [   #Uma Lista de tuplas
+                        (   # cada tupla com dois elementos
+                            sapl.parlamentares.models.Parlamentar, 
+                            [<sapl.utils.SaplGenericRelation: autor>]
+                        ),
+                    ]
+    """
+    return list(map(
+        lambda x: (x,
+                   list(filter(
+                       lambda field: (
+                           isinstance(
+                               field, SaplGenericRelation) and
+                           field.related_model == model),
+                       x._meta.get_fields(include_hidden=True)))),
+        models_with_gr_for_model(model)
+    ))