django-mongoengine-filter¶
django-mongoengine-filter is a reusable Django application for allowing users to filter mongoengine querysets dynamically. It’s very similar to popular django-filter library and is design to be used as a drop-in replacement (as much as it’s possible) strictly tied to MongoEngine.
Full documentation on Read the docs.
Requirements¶
- Python 2.7, 3.5, 3.6, 3.7
- Django 1.11, 2.0, 2.1, 2.2
Installation¶
Install using pip:
pip install django-mongoengine-filter
Or latest development version:
pip install https://github.com/barseghyanartur/django-mongoengine-filter/archive/master.zip
Usage¶
Sample document
from mongoengine import fields, document
from .constants import PROFILE_TYPES, PROFILE_TYPE_FREE, GENDERS, GENDER_MALE
class Person(document.Document):
name = fields.StringField(
required=True,
max_length=255,
default="Robot",
verbose_name="Name"
)
age = fields.IntField(required=True, verbose_name="Age")
num_fingers = fields.IntField(
required=False,
verbose_name="Number of fingers"
)
profile_type = fields.StringField(
required=False,
blank=False,
null=False,
choices=PROFILE_TYPES,
default=PROFILE_TYPE_FREE,
)
gender = fields.StringField(
required=False,
blank=False,
null=False,
choices=GENDERS,
default=GENDER_MALE
)
def __str__(self):
return self.name
Sample filter
import django_mongoengine_filter
class PersonFilter(django_mongoengine_filter.FilterSet):
profile_type = django_mongoengine_filter.StringFilter()
ten_fingers = django_mongoengine_filter.MethodFilter(
action="ten_fingers_filter"
)
class Meta:
model = Person
fields = ["profile_type", "ten_fingers"]
def ten_fingers_filter(self, queryset, name, value):
if value == 'yes':
return queryset.filter(num_fingers=10)
return queryset
Sample view
With function-based views:
def person_list(request):
filter = PersonFilter(request.GET, queryset=Person.objects)
return render(request, "dfm_app/person_list.html", {"object_list": filter.qs})
Or class-based views:
from django_mongoengine_filter.views import FilterView
class PersonListView(FilterView):
filterset_class = PersonFilter
template_name = "dfm_app/person_list.html"
Sample template
<ul>
{% for obj in object_list %}
<li>{{ obj.name }} - {{ obj.age }}</li>
{% endfor %}
</ul>
Sample requests
- GET /persons/
- GET /persons/?profile_type=free&gender=male
- GET /persons/?profile_type=free&gender=female
- GET /persons/?profile_type=member&gender=female
- GET /persons/?ten_fingers=yes
Development¶
Testing¶
To run tests in your working environment type:
./runtests.py
To test with all supported Python versions type:
tox
Running MongoDB¶
The easiest way is to run it via Docker:
docker pull mongo:latest
docker run -p 27017:27017 mongo:latest
Writing documentation¶
Keep the following hierarchy.
=====
title
=====
header
======
sub-header
----------
sub-sub-header
~~~~~~~~~~~~~~
sub-sub-sub-header
^^^^^^^^^^^^^^^^^^
sub-sub-sub-sub-header
++++++++++++++++++++++
sub-sub-sub-sub-sub-header
**************************
License¶
GPL 2.0/LGPL 2.1
Author¶
Artur Barseghyan <artur.barseghyan@gmail.com>
Documentation¶
Contents:
Filter Reference¶
This is a reference document with a list of the filters and their arguments.
Filters¶
CharFilter¶
This filter does simple character matches, used with CharField and
TextField by default.
BooleanFilter¶
This filter matches a boolean, either True or False, used with
BooleanField and NullBooleanField by default.
ChoiceFilter¶
This filter matches an item of any type by choices, used with any field that
has choices.
MultipleChoiceFilter¶
The same as ChoiceFilter except the user can select multiple items and it
selects the OR of all the choices.
DateFilter¶
Matches on a date. Used with DateField by default.
DateTimeFilter¶
Matches on a date and time. Used with DateTimeField by default.
TimeFilter¶
Matches on a time. Used with TimeField by default.
ModelChoiceFilter¶
Similar to a ChoiceFilter except it works with related models, used for
ForeignKey by default.
ModelMultipleChoiceFilter¶
Similar to a MultipleChoiceFilter except it works with related models, used
for ManyToManyField by default.
NumberFilter¶
Filters based on a numerical value, used with IntegerField, FloatField,
and DecimalField by default.
RangeFilter¶
Filters where a value is between two numerical values.
DateRangeFilter¶
Filter similar to the admin changelist date one, it has a number of common selections for working with date fields.
AllValuesFilter¶
This is a ChoiceFilter whose choices are the current values in the
database. So if in the DB for the given field you have values of 5, 7, and 9
each of those is present as an option. This is similar to the default behavior
of the admin.
Core Arguments¶
name¶
The name of the field this filter is supposed to filter on, if this is not
provided it automatically becomes the filter’s name on the FilterSet.
label¶
The label as it will apear in the HTML, analogous to a form field’s label argument.
widget¶
The django.form Widget class which will represent the Filter. In addition
to the widgets that are included with Django that you can use there are
additional ones that django-filter provides which may be useful:
django_filters.widgets.LinkWidget– this displays the options in a mannner similar to the way the Django Admin does, as a series of links. The link for the selected option will haveclass="selected".
action¶
An optional callable that tells the filter how to handle the queryset. It
recieves a QuerySet and the value to filter on and should return a
Queryset that is filtered appropriately.
lookup_type¶
The type of lookup that should be performed using the Django ORM. All the
normal options are allowed, and should be provided as a string. You can also
provide either None or a list or a tuple. If None is provided,
then the user can select the lookup type from all the ones available in the Django
ORM. If a list or tuple is provided, then the user can select from those
options.
distinct¶
A boolean value that specifies whether the Filter will use distinct on the
queryset. This option can be used to eliminate duplicate results when using filters that span related models. Defaults to False.
exclude¶
A boolean value that specifies whether the Filter should use filter or exclude on the queryset.
Defaults to False.
**kwargs¶
Any extra keyword arguments will be provided to the accompanying form Field.
This can be used to provide arguments like choices or queryset.
Widget Reference¶
This is a reference document with a list of the provided widgets and their arguments.
LinkWidget¶
This widget renders each option as a link, instead of an actual <input>. It has
one method that you can overide for additional customizability.
option_string() should return a string with 3 Python keyword argument
placeholders:
attrs: This is a string with all the attributes that will be on the final<a>tag.query_string: This is the query string for use in thehrefoption on the<a>elemeent.label: This is the text to be displayed to the user.