Language form field support and test

.github/FUNDING.yml

@@ -0,0 +1,15 @@
+# These are supported funding model platforms
+
+github: vporton # Replace with up to 4 GitHub Sponsors-enabled usernames e.g., [user1, user2]
+patreon: # Replace with a single Patreon username
+open_collective: # Replace with a single Open Collective username
+ko_fi: # Replace with a single Ko-fi username
+tidelift: # Replace with a single Tidelift platform-name/package-name e.g., npm/babel
+community_bridge: # Replace with a single Community Bridge project-name e.g., cloud-foundry
+liberapay: # Replace with a single Liberapay username
+issuehunt: # Replace with a single IssueHunt username
+lfx_crowdfunding: # Replace with a single LFX Crowdfunding project-name e.g., cloud-foundry
+polar: # Replace with a single Polar username
+buy_me_a_coffee: # Replace with a single Buy Me a Coffee username
+thanks_dev: # Replace with a single thanks.dev username
+custom: # Replace with up to 4 custom sponsorship URLs e.g., ['link1', 'link2']

language_test/forms.py

@@ -0,0 +1,5 @@
+from django import forms
+from languages.forms import LanguageField
+
+class TestForm(forms.Form):
+    language = LanguageField()

language_test/settings.py

@@ -0,0 +1,122 @@
+"""
+Django settings for language_test project.
+
+Generated by 'django-admin startproject' using Django 1.11.20.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/1.11/topics/settings/
+
+For the full list of settings and their values, see
+https://docs.djangoproject.com/en/1.11/ref/settings/
+"""
+
+import os
+
+# Build paths inside the project like this: os.path.join(BASE_DIR, ...)
+BASE_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+
+
+# Quick-start development settings - unsuitable for production
+# See https://docs.djangoproject.com/en/1.11/howto/deployment/checklist/
+
+# SECURITY WARNING: keep the secret key used in production secret!
+SECRET_KEY = 'kr09q(tihx%2+mg^z^4axqk+x&(ujtm(uv00==ljo-l+_8dx=@'
+
+# SECURITY WARNING: don't run with debug turned on in production!
+DEBUG = True
+
+ALLOWED_HOSTS = []
+
+
+# Application definition
+
+INSTALLED_APPS = [
+    'django.contrib.admin',
+    'django.contrib.auth',
+    'django.contrib.contenttypes',
+    'django.contrib.sessions',
+    'django.contrib.messages',
+    'django.contrib.staticfiles',
+    'language_test',
+]
+
+MIDDLEWARE = [
+    'django.middleware.security.SecurityMiddleware',
+    'django.contrib.sessions.middleware.SessionMiddleware',
+    'django.middleware.common.CommonMiddleware',
+    'django.middleware.csrf.CsrfViewMiddleware',
+    'django.contrib.auth.middleware.AuthenticationMiddleware',
+    'django.contrib.messages.middleware.MessageMiddleware',
+    'django.middleware.clickjacking.XFrameOptionsMiddleware',
+]
+
+ROOT_URLCONF = 'language_test.urls'
+
+TEMPLATES = [
+    {
+        'BACKEND': 'django.template.backends.django.DjangoTemplates',
+        'DIRS': [os.path.join(BASE_DIR, 'templates')]
+        ,
+        'APP_DIRS': True,
+        'OPTIONS': {
+            'context_processors': [
+                'django.template.context_processors.debug',
+                'django.template.context_processors.request',
+                'django.contrib.auth.context_processors.auth',
+                'django.contrib.messages.context_processors.messages',
+            ],
+        },
+    },
+]
+
+WSGI_APPLICATION = 'language_test.wsgi.application'
+
+
+# Database
+# https://docs.djangoproject.com/en/1.11/ref/settings/#databases
+
+DATABASES = {
+    'default': {
+        'ENGINE': 'django.db.backends.sqlite3',
+        'NAME': os.path.join(BASE_DIR, 'db.sqlite3'),
+    }
+}
+
+
+# Password validation
+# https://docs.djangoproject.com/en/1.11/ref/settings/#auth-password-validators
+
+AUTH_PASSWORD_VALIDATORS = [
+    {
+        'NAME': 'django.contrib.auth.password_validation.UserAttributeSimilarityValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.MinimumLengthValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.CommonPasswordValidator',
+    },
+    {
+        'NAME': 'django.contrib.auth.password_validation.NumericPasswordValidator',
+    },
+]
+
+
+# Internationalization
+# https://docs.djangoproject.com/en/1.11/topics/i18n/
+
+LANGUAGE_CODE = 'en-us'
+
+TIME_ZONE = 'UTC'
+
+USE_I18N = True
+
+USE_L10N = True
+
+USE_TZ = True
+
+
+# Static files (CSS, JavaScript, Images)
+# https://docs.djangoproject.com/en/1.11/howto/static-files/
+
+STATIC_URL = '/static/'

language_test/templates/language_test/test.html

@@ -0,0 +1,8 @@
+<html>
+    <head>
+        <title>Test</title>
+    </head>
+    <body>
+        <p>{{ form }}</p>
+    </body>
+</html>

language_test/urls.py

@@ -0,0 +1,24 @@
+"""language_test URL Configuration
+
+The `urlpatterns` list routes URLs to views. For more information please see:
+    https://docs.djangoproject.com/en/1.11/topics/http/urls/
+Examples:
+Function views
+    1. Add an import:  from my_app import views
+    2. Add a URL to urlpatterns:  url(r'^$', views.home, name='home')
+Class-based views
+    1. Add an import:  from other_app.views import Home
+    2. Add a URL to urlpatterns:  url(r'^$', Home.as_view(), name='home')
+Including another URLconf
+    1. Import the include() function: from django.conf.urls import url, include
+    2. Add a URL to urlpatterns:  url(r'^blog/', include('blog.urls'))
+"""
+from django.contrib import admin
+from django.urls import re_path, path
+
+from language_test import views
+
+urlpatterns = [
+    re_path(r'^admin/', admin.site.urls),
+    path('', views.TestView.as_view())
+]

language_test/views.py

@@ -0,0 +1,9 @@
+from django.shortcuts import render
+from django.views import View
+from .forms import TestForm
+
+
+class TestView(View):
+    def get(self, request):
+        form = TestForm()
+        return render(request, 'language_test/test.html', {'form': form})

language_test/wsgi.py

@@ -0,0 +1,16 @@
+"""
+WSGI config for language_test project.
+
+It exposes the WSGI callable as a module-level variable named ``application``.
+
+For more information on this file, see
+https://docs.djangoproject.com/en/1.11/howto/deployment/wsgi/
+"""
+
+import os
+
+from django.core.wsgi import get_wsgi_application
+
+os.environ.setdefault("DJANGO_SETTINGS_MODULE", "language_test.settings")
+
+application = get_wsgi_application()

languages/fields.py

@@ -8,6 +8,13 @@ def __init__(self, *args, **kwargs):
         # Local import so the languages aren't loaded unless they are needed.
         from .languages import LANGUAGES
 
-        kwargs.setdefault('max_length', 3)
+        # kwargs.setdefault('max_length', 3)
+        kwargs.setdefault('max_length', 255)
         kwargs.setdefault('choices', LANGUAGES)
         super(CharField, self).__init__(*args, **kwargs)
+
+    def formfield(self, **kwargs):
+        from languages import forms
+        defaults = {'form_class': forms.LanguageField}
+        defaults.update(kwargs)
+        return super().formfield(**defaults)

languages/forms.py

@@ -0,0 +1,32 @@
+from django import forms
+from django.core.cache import caches
+
+sorted_languages = None
+def _get_sorted_languages():
+    from .languages import LANGUAGES
+    global sorted_languages
+    if sorted_languages:
+        return sorted_languages
+    sorted_languages = sorted(LANGUAGES, key=lambda p: p[1])
+    return sorted_languages
+
+class _LanguageWidget(forms.Select):
+    def render(self, name, value, attrs=None, renderer=None):
+        cache = caches['default']
+        result = cache.get(value or '')
+        if result is not None:
+            return result
+        result = super().render(name, value, attrs, renderer)
+        cache.set(value or '', result)
+        return result
+
+class LanguageField(forms.ChoiceField):
+    """
+    A language field for Django forms.
+    """
+    widget = _LanguageWidget
+
+    def __init__(self, *args, **kwargs):
+        defaults = {'choices': _get_sorted_languages()}
+        defaults.update(kwargs)
+        super().__init__(*args, **defaults)

languages/languages.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 LANGUAGES = (
     ("aa", _(u"Afar")),

languages/regenerate.py

@@ -11,7 +11,7 @@
 import urllib2
 
 TEMPLATE = u'''# -*- coding: utf-8 -*-
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 
 LANGUAGES = (
     %(languages)s

manage.py

@@ -0,0 +1,22 @@
+#!/usr/bin/env python3
+import os
+import sys
+
+if __name__ == "__main__":
+    os.environ.setdefault("DJANGO_SETTINGS_MODULE", "language_test.settings")
+    try:
+        from django.core.management import execute_from_command_line
+    except ImportError:
+        # The above import may fail for some other reason. Ensure that the
+        # issue is really that Django is missing to avoid masking other
+        # exceptions on Python 2.
+        try:
+            import django
+        except ImportError:
+            raise ImportError(
+                "Couldn't import Django. Are you sure it's installed and "
+                "available on your PYTHONPATH environment variable? Did you "
+                "forget to activate a virtual environment?"
+            )
+        raise
+    execute_from_command_line(sys.argv)