Added auth_hacks app

auth_hacks/models.py

@@ -0,0 +1,58 @@
+# -*- coding: utf-8 -*-
+import sys
+
+from django.conf import settings
+from django.core import validators
+
+
+MAX_LENGTH = getattr(settings, 'USERNAME_MAX_LENGTH', 100)
+
+
+def hack_validators(field):
+    for i, v in enumerate(field.validators):
+        if isinstance(v, validators.MaxLengthValidator):
+            field.validators.pop(i)
+
+    field.validators.insert(0, validators.MaxLengthValidator(MAX_LENGTH))
+
+
+def hack_model(model_class, field_name):
+    field = model_class._meta.get_field(field_name)
+    field.max_length = MAX_LENGTH
+    hack_validators(field)
+
+
+def hack_form(form_class, field_name):
+    if hasattr(form_class, 'declared_fields') and form_class.declared_fields:
+        fields = form_class.declared_fields
+    elif hasattr(form_class, 'base_fields') and form_class.base_fields:
+        fields = form_class.base_fields
+    else:
+        raise TypeError('Provided object: %s doesnt seem to be a valid Form or '
+                        'ModelForm class.' % form_class)
+    username = fields[field_name]
+    username.help_text = "Obrigatório. %s caracteres ou menos. Somente letras, dígitos e @/./+/-/_." % MAX_LENGTH
+    hack_validators(username)
+    username.max_length = MAX_LENGTH
+    username.widget.attrs['maxlength'] = MAX_LENGTH
+
+
+def hack_forms():
+    forms = [
+        "django.contrib.auth.forms.UserCreationForm",
+        "django.contrib.auth.forms.UserChangeForm",
+        "django.contrib.auth.forms.AuthenticationForm",
+    ]
+
+    for f in forms:
+        module_name, sep, class_name = f.rpartition(".")
+        if not module_name in sys.modules:
+            __import__(module_name)
+        module = sys.modules[module_name]
+        cls = getattr(module, class_name)
+        hack_form(cls, "username")
+
+
+from django.contrib.auth import models
+hack_model(models.User, "username")
+hack_forms()

auth_hacks/tests/__init__.py

@@ -0,0 +1 @@
+from auth_hacks.tests.model_hacks import *

auth_hacks/tests/model_hacks.py

@@ -0,0 +1,54 @@
+# -*- coding: utf-8 -*-
+import unittest
+
+from django import forms
+from django.db import models as django_models
+
+from auth_hacks import models
+
+
+class SampleModel(django_models.Model):
+    name = django_models.CharField(max_length=30)
+
+    class Meta:
+        app_label = 'auth_hacks'
+
+
+class SampleModelForm(forms.ModelForm):
+    class Meta:
+        model = SampleModel
+
+
+class AuthHackModelTestCase(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        models.hack_model(SampleModel, "name")
+
+    def test_deve_mudar_max_length_do_field_para_100(self):
+        self.assertEquals(100, SampleModel._meta.get_field("name").max_length)
+
+    def test_deve_mudar_validators_do_field(self):
+        validator = SampleModel._meta.get_field("name").validators[0]
+        self.assertEquals(100, validator.limit_value)
+
+
+class AuthHackFormTestCase(unittest.TestCase):
+
+    @classmethod
+    def setUpClass(cls):
+        models.hack_form(SampleModelForm, "name")
+        cls.field = SampleModelForm.base_fields["name"]
+
+    def test_deve_mudar_max_length_de_field_no_formulario(self):
+        self.assertEquals(100, self.field.max_length)
+
+    def test_deve_mudar_attr_max_length_do_widget_do_formulario(self):
+        self.assertEquals(100, self.field.widget.attrs['maxlength'])
+
+    def test_deve_mudar_help_text_para_exibir_descricao_correta(self):
+        self.assertEquals(u"Obrigatório. 100 caracteres ou menos. Somente letras, dígitos e @/./+/-/_.", self.field.help_text)
+
+    def test_deve_mudar_validator_do_field(self):
+        validator = self.field.validators[0]
+        self.assertEquals(100, validator.limit_value)