Graphene Subfilters

---

This little django project shows a way to implement filters on nested objects using graphene-django

The following instructions describe the steps to setup/run the application from scratch.

Required Packages

In Debian distributions 'apt-get install', in Redhat distributions 'yum install'

* Python 3.7
* Python 3.6 Dev packages
* Python Virtual environment
* python-pip
* Git    

Clone this repo

Just type in the command line::

$ git clone https://github.com/allangz/graphene_subfilters.git

Create virtualenv

Create and activate python virtualenv::

$ python3.7 -m venv <DIR>/test_venv
$ source <DIR>/test_venv/bin/activate

Install Python Packages

To install necessary packages run::

$ pip install -r requirements.txt

Configure Database

The example works with sqlite. Change the settings as you need. After that just run the migrations::

$ python manage.py migrate

Run application

To run the application just type in console::

$ python manage.py runserver

At this point you should be able to see the GraphiQL interface

If you can access the view, congrats your app is up and running !!!

Query on subnodes

The main goal of this example is implementing some filters on the nested objects from the main query using graphene-django, the implementation for it can be found on the file polls/schema.py.

It is important to mention here, to have this feature do not use __all__ option on the fields Meta class, use a custom resolver for the desired fields to filter.

Here is an example of a query, with a filter in the two nested subnodes::

{
  allQuestions(searchText: "dummy") {
    id
    questionText
    choices(searchChoices: "The") {
      choiceText
      subChoices(searchSubChoices: "another") {
        id
        subChoiceText
      }
    }
  }
}

Load Test Data

You can load some data for the example query::

$ python manage.py loaddata polls polls.json