Osmosis
Osmosis is a simple Django application for importing files (e.g. CSVs) into a database on the Google AppEngine platform
Basic usage
Settings
Add 'osmosis' to your INSTALLED_APPS
Model
In your project, subclass AbstractImportTask, add your forms, and other
parameters if you need. Example::
from osmosis.models import AbstractImportTask, ModelImportTaskMixin
class ContactImportTask(ModelImportTaskMixin, AbstractImportTask):
class Osmosis:
forms = [
'events.forms.ContactForm' # This is standard django (model) form
]
queue = deferred.deferred._DEFAULT_QUEUE
generate_error_csv = True
rows_per_shard = 100
Upload Form:
Create the form...
class ContactUploadForm(forms.ModelForm):
class Meta:
model = ContactImportTask
...and add it to the template with action parameter generated by
from google.appengine.ext.blobstore import create_upload_url
blobstore_upload_url = create_upload_url(reverse('my_app:upload')) # use your view that will handle upload
HTML:
<form action="{{ blobstore_upload_url }}" method="POST" enctype="multipart/form-data">
{% csrf_token %}
{{ contact_upload_form }}
<input type="submit" name="submit" value="Upload csv">
</form>
View:
This view is called after the file has been uploaded to blobstore. Very basic example:
def upload(request):
if request.method == "POST":
form = ContactUploadForm(request.POST, request.FILES)
if form.is_valid():
task = form.save(commit=False)
task.start()
return HttpResponse('Upload has started')
else:
return HttpResponse('Only POST please', status=400)