Metadata-Version: 2.1
Name: django-nlf
Version: 0.0.4
Summary: Django Natural Language Filter package
Home-page: https://github.com/hodossy/django-nlf
Author: Hodossy, Szabolcs
Author-email: hodossy.szabolcs@gmail.com
Maintainer: Hodossy, Szabolcs
Maintainer-email: hodossy.szabolcs@gmail.com
License: MIT
Keywords: django,natural-Language,filtering
Platform: any
Classifier: Development Status :: 4 - Beta
Classifier: Environment :: Web Environment
Classifier: Framework :: Django :: 2.2
Classifier: Framework :: Django :: 3.0
Classifier: Framework :: Django :: 3.1
Classifier: Framework :: Django
Classifier: Intended Audience :: Developers
Classifier: License :: OSI Approved :: MIT License
Classifier: Operating System :: OS Independent
Classifier: Programming Language :: Python
Classifier: Programming Language :: Python :: 3
Classifier: Programming Language :: Python :: 3.7
Classifier: Programming Language :: Python :: 3.8
Classifier: Programming Language :: Python :: 3.9
Classifier: Typing :: Typed
Requires-Python: >=3.7
Description-Content-Type: text/markdown
Requires-Dist: antlr4-python3-runtime (==4.8)
Requires-Dist: django (>=2.2)

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# Django Natural Language Filter

Django NLF provides a simple and easy way to express complex filtering criteria with a filtering language as close to natural language as possible, while providing APIs to further customize the user experience.

## Installation

Install using `pip`,

```
pip install django-nlf
```

And add `django_nlf` to your `INSTALLED_APPS`.

```python
INSTALLED_APPS = [
    ...
    "django_nlf",
]
```

Then you can use the `DjangoNLFilter` with a queryset and a string, containing the filter expression. Please see the [Language Reference](https://django-nlf.readthedocs.io/en/stable/language/index.html) for more details.

```python
from django_nlf.filters import DjangoNLFilter
from .models import Article

nl_filter = DjangoNLFilter()
qs = Article.objects.all()
q = "author.username is john or title contains news"
# equivalent to Article.objects.filter(Q(author__username="john") | Q(title__icontains="news"))
articles = nl_filter.filter(qs, q)

# Nested logical operators are also supported:
q = "author.username is john and (title contains news or created_at <= 2020-06-05)"
# equivalent to
# Article.objects.filter(
#   Q(author__username="john") & (Q(title__icontains="news") | Q(created_at__lte="2020-06-05"))
# )
articles = nl_filter.filter(qs, q)
```

## Django REST framework integration

Simply add the natural language filter backend to your filter backends list.

```python
REST_FRAMEWORK = {
  "DEFAULT_FILTER_BACKENDS": (
    "django_nlf.rest_framework.DjangoNLFilterBackend",
  ),
}
```


