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Fast CSV imports using django model forms.

Project description

# django-model-import

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Django Model Import is a light weight CSV importer built for speed.

It uses a standard Django `ModelForm` to parse each row, giving you a familiar API to work with
for data validation and model instantiation. In most cases, if you already have a `ModelForm`
for the `ContentType` you are importing you do not need to create an import specific form.

To present feedback to the end-user running the import you can easily generate a preview
of the imported data by toggling the `commit` parameter.

It also provides some import optimized fields for ForeignKey's, allowing preloading all
possible values, or caching each lookup as it occurs, or looking up a model where multiple
fields are needed to uniquely identify a resource.

## Installation

Standard pip install:

pip install django-model-import

## Quickstart

import djangomodelimport

class BookImporter(djangomodelimport.ImporterModelForm):
name = forms.CharField()
author = CachedChoiceField(queryset=Author.objects.all(), to_field='name')

class Meta:
model = Book
fields = (

with'books.csv', 'rb') as fh:
data ="utf-8")

# Use tablib
parser = djangomodelimport.TablibCSVImportParser(BookImporter)
headers, rows = parser.parse(data)

# Process
importer = djangomodelimport.ModelImporter(BookImporter)
preview = importer.process(headers, rows, commit=False)
errors = preview.get_errors()

if errors:

importresult = importer.process(headers, rows, commit=True)
for result in importresult.get_results():

## Composite key lookups

Often a relationship cannot be referenced via a single unique string. For this we can use
a `CachedChoiceField` with a `CompositeLookupWidget`. The widget looks for the values
under the `type` and `variant` columns in the source CSV, and does a unique lookup
with the field names specified in `to_field`, e.g. `queryset.get(type__name=type, name=variant)`.

The results of each `get` are cached internally for the remainder of the import minimising
any database access.

class AssetImporter(ImporterModelForm):
site = djangomodelimport.CachedChoiceField(, to_field='ref')
type = djangomodelimport.CachedChoiceField(queryset=AssetType.objects.filter(is_active=True), to_field='name')
type_variant = djangomodelimport.CachedChoiceField(
widget=djangomodelimport.CompositeLookupWidget(source=('type', 'variant')),
to_field=('type__name', 'name'),
contractor = djangomodelimport.CachedChoiceField(, to_field='name')

## Flat related fields

Often you'll have a OneToOneField or just a ForeignKey to another model, but you want to be able to
create/update that other model via this one. You can flatten all of the related model's fields onto
this importer using `FlatRelatedField`.

class ClientImporter(ImporterModelForm):
primary_contact = FlatRelatedField(
'contact_name': {'to_field': 'name', 'required': True},
'email': {'to_field': 'email'},
'email_cc': {'to_field': 'email_cc'},
'mobile': {'to_field': 'mobile'},
'phone_bh': {'to_field': 'phone_bh'},
'phone_ah': {'to_field': 'phone_ah'},
'fax': {'to_field': 'fax'},

class Meta:
model = Client
fields = (


## Tests
Run tests with `python example/ test testapp`

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