Django Mongoengine RQL

Introduction

RQL (Resource query language) is designed for modern application development. It is built for the web, ready for NoSQL, and highly extensible with simple syntax. This is a query language for fast and convenient database interaction. RQL was designed for use in URLs to request object-style data structures.

This library is a Mongoengine-specific implementation of RQL filtering.

RQL Reference

Django RQL

Mongoengine

Install

Django Mongoengine RQL can be installed from pypi.org using pip:

$ pip install django-mongoengine-rql

Documentation

This library is fully based on Django RQL, so there are no specific docs for it. Full documentation for Django-RQL is available at https://django-rql.readthedocs.org.

Example

# filters.py
from dj_mongoengine_rql.filter_cls import MongoengineRQLFilterClass
from py_rql.constants import FilterLookups
from your_docs import Document

class DocFilters(MongoengineRQLFilterClass):
    MODEL = Document
    SELECT = True
    FILTERS = (
        'filter1',
        {
            'filter': 'filter2',
            'source': 'related_doc__doc_field',
        },
        {
            'namespace': 'ns1',
            'filters': ('ns1f',),
        },
        {
            'filter': 'filter3',
            'lookups': {FilterLookups.EQ, FilterLookups.IN},
        },
    )


# views.py
from dj_rql.drf.backend import RQLFilterBackend
from dj_rql.drf.paginations import RQLContentRangeLimitOffsetPagination
from rest_framework import mixins
from rest_framework.viewsets import GenericViewSet

class DRFViewSet(mixins.ListModelMixin, GenericViewSet):
    queryset = Document.objects.all()
    rql_filter_class = DocFilters
    pagination_class = RQLContentRangeLimitOffsetPagination
    filter_backends = (RQLFilterBackend,)

Notes

Due to implementation and Mongo engine features there may be some limitations in filtering, for example:

• distinct setting is not supported for filters
• annotations are not supported, as well

Development

1. Python 3.10+
2. Install dependencies pip install poetry && poetry install
3. We use isort library to order and format our imports, and black - to format the code. We check it using flake8-isort and flake8-black libraries (automatically on flake8 run).
   For convenience you may run docker compose run format to format the code.

Testing

1. Python 3.10+
2. Install dependencies pip install poetry && poetry install

Check code style: poetry run flake8 Run tests: poetry run pytest Run integration tests: docker compose run app_test

Tests reports are generated in tests/reports.

• out.xml - JUnit test results
• coverage.xml - Coverage xml results

To generate HTML coverage reports use: --cov-report html:tests/reports/cov_html

License

Django Mongoengine RQL is released under the Apache License Version 2.0.