Source code for django_graph_api.views

import json

from django.http import JsonResponse
from django.template.response import TemplateResponse
from django.utils.decorators import method_decorator
from django.views.decorators.csrf import (
from django.views.generic import View

from django_graph_api.graphql.request import Request

[docs]class GraphQLView(View): """ Django view handles Graph API queries. ``GET`` returns the HTML for the GraphiQL API explorer. ``POST`` accepts a JSON body in the form of:: { "query": <query>, "variables": <variables> } and returns a JSON response with a "data" and/or "error" object. """ graphiql_version = '0.11.11' graphql_url = '/graphql' template_name = 'django_graph_api/graphiql.html' schema = None @method_decorator(ensure_csrf_cookie) @method_decorator(csrf_protect) def dispatch(self, *args, **kwargs): return super(GraphQLView, self).dispatch(*args, **kwargs) def get(self, request, *args, **kwargs): return TemplateResponse( request=self.request, template=[self.template_name], context={ 'graphiql_version': self.graphiql_version, 'graphql_url': self.graphql_url, }, ) def post(self, request, *args, **kwargs): # Python 2 json library raises ValueError; Python 3 raises more specific error. JSONDecodeError = getattr(json, 'JSONDecodeError', ValueError) try: request_data = self.get_request_data() graphql_request = Request( document=request_data['query'], variables=request_data.get('variables'), operation_name=request_data.get('operationName'), schema=self.schema ) except (KeyError, JSONDecodeError): return JsonResponse({ 'errors': [ {'message': 'Data must be json with a "query" key and optional "variables" key'}, ], }) graphql_request.validate() data = None errors = graphql_request.errors if not errors: data, errors = graphql_request.execute() response = {} if data: response['data'] = data if errors: response['errors'] = [error.serialize() for error in errors] return JsonResponse(response) def get_request_data(self): """ Takes an incoming request and parses it into a dictionary containing query and variables. For now we only support json dictionaries in the style of GraphiQL, i.e. {"query": query, "variables": null} """ body = self.request.body.decode('utf-8') return json.loads(body)