datasources: start a csv data source

.gitignore

@@ -1,3 +1,4 @@
 *.pyc
 local_settings.py
 passerelle.sqlite3
+media

passerelle/datasources/admin.py

@@ -0,0 +1,8 @@
+from django.contrib import admin
+
+from models import CsvDataSource
+
+class CsvDataSourceAdmin(admin.ModelAdmin):
+    prepopulated_fields = {'slug': ('title',)}
+
+admin.site.register(CsvDataSource, CsvDataSourceAdmin)

passerelle/datasources/models.py

@@ -0,0 +1,26 @@
+import csv
+
+from django.db import models
+
+from model_utils.managers import InheritanceManager
+
+
+class BaseDataSource(models.Model):
+    title = models.CharField(max_length=50)
+    slug = models.SlugField()
+
+    objects = InheritanceManager()
+
+
+class CsvDataSource(BaseDataSource):
+    csv_file = models.FileField(upload_to='csv')
+
+    def get_data(self):
+        data = []
+        self.csv_file.open()
+        dialect = csv.Sniffer().sniff(self.csv_file.read(1024))
+        self.csv_file.seek(0)
+        reader = csv.reader(self.csv_file, dialect)
+        for row in reader:
+            data.append(unicode(row[0], 'utf-8')) # 1st column only
+        return data

passerelle/datasources/tests.py

@@ -0,0 +1,16 @@
+"""
+This file demonstrates writing tests using the unittest module. These will pass
+when you run "manage.py test".
+
+Replace this with more appropriate tests for your application.
+"""
+
+from django.test import TestCase
+
+
+class SimpleTest(TestCase):
+    def test_basic_addition(self):
+        """
+        Tests that 1 + 1 always equals 2.
+        """
+        self.assertEqual(1 + 1, 2)

passerelle/datasources/urls.py

@@ -0,0 +1,5 @@
+from django.conf.urls import patterns, url, include
+
+urlpatterns = patterns('passerelle.datasources.views',
+    url(r'(?P<datasource>\w+)/json$', 'json'),
+)

passerelle/datasources/views.py

@@ -0,0 +1,8 @@
+from jsonresponse import to_json
+
+from models import BaseDataSource
+
+@to_json('api')
+def json(request, datasource):
+    ds = BaseDataSource.objects.get_subclass(slug=datasource)
+    return ds.get_data()

passerelle/settings.py

@@ -45,12 +45,12 @@ USE_TZ = True
 
 # Absolute filesystem path to the directory that will hold user-uploaded files.
 # Example: "/home/media/media.lawrence.com/media/"
-MEDIA_ROOT = ''
+MEDIA_ROOT = os.path.join(PROJECT_PATH, 'media')
 
 # URL that handles the media served from MEDIA_ROOT. Make sure to use a
 # trailing slash.
 # Examples: "http://media.lawrence.com/media/", "http://example.com/media/"
-MEDIA_URL = ''
+MEDIA_URL = '/media/'
 
 # Absolute path to the directory static files should be collected to.
 # Don't put anything in this directory yourself; store your static files
@@ -119,6 +119,7 @@ INSTALLED_APPS = (
     'django.contrib.admin',
     # Uncomment the next line to enable admin documentation:
     # 'django.contrib.admindocs',
+    'passerelle.datasources',
 )
 
 # A sample logging configuration. The only tangible logging

passerelle/urls.py

@@ -4,9 +4,6 @@ from django.contrib import admin
 admin.autodiscover()
 
 urlpatterns = patterns('',
-    # Examples:
-    # url(r'^$', 'passerelle.views.home', name='home'),
-    # url(r'^passerelle/', include('passerelle.foo.urls')),
-
+    url(r'^data/', include('passerelle.datasources.urls')),
     url(r'^admin/', include(admin.site.urls)),
 )

requirements.txt

@@ -1,2 +1,3 @@
 django == 1.4
 http://pypi.python.org/packages/source/d/django-jsonresponse/django-jsonresponse-0.5.tar.gz
+django-model-utils

setup.py

@@ -13,6 +13,7 @@ setup(name='passerelle',
         packages=find_packages(os.path.dirname(__file__) or '.'),
         install_requires=[
             'django >= 1.4.2, < 1.5',
+            'django-model-utils',
         ],
         dependency_links = [
             'http://pypi.python.org/packages/source/d/django-jsonresponse/django-jsonresponse-0.5.tar.gz',