django-graphql-geojson 0.0.2

GeoJSON support for Django GraphQL

GeoJSON support for Django GraphQL

Dependencies

• Python ≥ 3.4

• Django ≥ 1.11

Installation

Update Graphene Django package.

pip install -U git+https://github.com/graphql-python/graphene-django.git@master

Install last stable version from Pypi.

pip install django-graphql-geojson

GeoJSONType

models.py

from django.contrib.gis.db import models


class Place(models.Model):
    name = models.CharField(max_length=255)
    location = models.PointField()

schema.py

from graphql_geojson.types import GeoJSONType


class PlaceType(GeoJSONType):

    class Meta:
        model = models.Place
        geojson_field = 'location'

Query

query {
  places {
    id
    type
    geometry {
      type
      coordinates
    }
    properties {
      name
    }
  }
}

GeoJSONInput

schema.py

import graphene

from graphql_geojson.types import GeoJSONInput


class CreatePlace(graphene.Mutation):
    place = graphene.Field(types.PlaceType)

    class Arguments:
        name = graphene.String(required=True)
        location = GeoJSONInput(required=True)

    @classmethod
    def mutate(cls, root, info, **args):
        place = models.Place.objects.create(**args)
        return cls(place=place)

Mutation

mutation CreatePlace($name: String!, $location: GeoJSONInput!) {
  createPlace(name: $name, location: $location) {
    place {
      id
    }
  }
}

---

GeoJSONInput object may be initialized in a few ways:

• Well-known text (WKT):

'POINT(5 23)'

• Hexadecimal (HEX):

'010100000000000000000014400000000000003740'

• GeoJSON:

{
  "type": "Point",
  "coordinates": [
    5.000000,
    23.000000
  ]
}