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Django REST API Query to return 2 value

I am a beginner who is learning Django using wagtail. I have a custom API model where I need to do 2 queries. I tried to return 2 queries at the same time with this code
def get_queryset(self):
return super().get_queryset().order_by('-first_published_at'), super().filter_queryset('story_type=Story')
and I am getting Attribute error 'str' object has no attribute 'model'
Here is my api.py
class ProdPagesAPIViewSet(BaseAPIViewSet):
renderer_classes = [JSONRenderer]
filter_backends = [FieldsFilter,
ChildOfFilter,
AncestorOfFilter,
DescendantOfFilter,
OrderingFilter,
TranslationOfFilter,
LocaleFilter,
SearchFilter,]
meta_fields = ["type","seo_title","search_description","first_published_at"]
body_fields = ["id","type","seo_title","search_description","first_published_at","title"]
listing_default_fields = ["type","seo_title","search_description","first_published_at","id","title","alternative_title","news_slug","blog_image","video_thumbnail","categories","blog_authors","excerpt","content","content2","tags","story_type"]
nested_default_fields = []
def get_queryset(self):
return super().get_queryset().order_by('-first_published_at'), super().filter_queryset('story_type=Story')
name = "stories"
model = AddStory
api_router.register_endpoint("stories", ProdPagesAPIViewSet)
With the order_by I am getting newest published stories first But I also want to filter story_type=Story. If I query this using URL then it works fine like ?story_type=Story
Here is the API response with the order_by query
{
"id": 5,
"meta": {
"type": "blog.AddStory",
"seo_title": "",
"search_description": "",
"first_published_at": "2022-09-19T23:27:12.895017Z"
},
"title": "Test Story",
"alternative_title": "Alternative Heading",
"blog_image": {
"id": 1,
"meta": {
"type": "wagtailimages.Image",
"detail_url": "http://localhost/api/v2/images/1/",
"download_url": "/127.0.0.1/media/original_images/tiktok_U4POKiL.jpeg"
},
"title": "tiktok"
},
"excerpt": "Test Excerpt",
"content": "<div class=\"block-full_richtext\"><p data-block-key=\"h053a\"> Test Story </p></div>",
"tags": [
"Test"
],
"news_slug": "eea1awauwc",
"story_type": "Story"
}
What I want is to filter story_type=Story & order_by('-first_published_at') at a same time, How can I do that?
Thanks a lot for reading.

def get_queryset(self):
return super().get_queryset().filter('story_type=Story').order_by('-first_published_at')

TypeError when trying to set a DB value

I'm trying to get my Flask server to update to a Mongo Atlas DB on request. When a request is passed with the required arguments, it will post to a Discord webhook then attempt to update DB values.
Example: Going to https://(redacted for privacy)/(redacted for privacy)?iid=123&username=wow&price=22 with JUST the webhook code (doesn't touch DB) will do this:
(sent to discord webhook) and give a success message (outputs as 200 in the console).
But when I enable the DB code, the same link will through a 500 error. Anything I can do? The console outputs as;
balance = mycol.find_one({"UserID": uid})['balance']
TypeError: 'NoneType' object is not subscriptable
I don't understand why this won't work. Here's the code that works, but only posts to the webhook (commented stuff is DB related):
#balance = mycol.find_one({"UserID": uid})['balance']
#res = mycol.find_one({"UserID": uid})
#newvalues = { "$set": { "UserID": uid, "balance": int(balance) + int(cashback_amt)} }
#mycol.update_one(res, newvalues)
img_url = f"https://www.roblox.com/bust-thumbnail/image?userId={uid}&width=420&height=420&format=png"
data = {
"content" : "**New purchase!**",
"username" : "robate"
}
data["embeds"] = [
{
"description" : f"**ItemID**: `{item_id}`\n**Item Price**: `{price}`\n**Item Cashback**: `{cashback_amt}`",
"title" : "New purchase made",
"color": 65311,
"thumbnail": {"url": img_url}
}
]
result = requests.post(purclog, json = data)
return jsonify({"res": True})
And the non-working DB included code:
balance = mycol.find_one({"UserID": uid})['balance']
res = mycol.find_one({"UserID": uid})
newvalues = { "$set": { "UserID": uid, "balance": int(balance) + int(cashback_amt)} }
mycol.update_one(res, newvalues)
img_url = f"https://www.roblox.com/bust-thumbnail/image?userId={uid}&width=420&height=420&format=png"
data = {
"content" : "**New purchase!**",
"username" : "robate"
}
data["embeds"] = [
{
"description" : f"**ItemID**: `{item_id}`\n**Item Price**: `{price}`\n**Item Cashback**: `{cashback_amt}`",
"title" : "New purchase made",
"color": 65311,
"thumbnail": {"url": img_url}
}
]
result = requests.post(purclog, json = data)
return jsonify({"res": True})
Any help is severely appreciated. Have a good day!
EDIT: The UserID is defined here:
try:
uid = requests.get(f"https://api.roblox.com/users/get-by-username?username={username}").json()['Id']
except:
return
balance = mycol.find_one({"UserID": uid})['balance']

Union type cannot resolve Object Type at Runtime

I am setting up a GraphQL Server with Python using Starlette and Graphene and ran into a problem I cannot find a solution for. The Graphene Documentation does not go into detail regarding the union type, which I am trying to implement.
I set up a minimum example based on the graphene documentation which you can run to replicate this problem
import os
import uvicorn
from graphene import ObjectType, Field, List, String, Int, Union
from graphene import Schema
from starlette.applications import Starlette
from starlette.graphql import GraphQLApp
from starlette.routing import Route
mock_data = {
"episode": 3,
"characters": [
{
"type": "Droid",
"name": "R2-D2",
"primaryFunction": "Astromech"
},
{
"type": "Human",
"name": "Luke Skywalker",
"homePlanet": "Tatooine"
},
{
"type": "Starship",
"name": "Millennium Falcon",
"length": 35
}
]
}
class Human(ObjectType):
name = String()
homePlanet = String()
class Droid(ObjectType):
name = String()
primary_function = String()
class Starship(ObjectType):
name = String()
length = Int()
class Characters(Union):
class Meta:
types = (Human, Droid, Starship)
class SearchResult(ObjectType):
characters = List(Characters)
episode = Int()
class RootQuery(ObjectType):
result = Field(SearchResult)
#staticmethod
def resolve_result(_, info):
return mock_data
graphql_app = GraphQLApp(schema=Schema(query=RootQuery))
routes = [
Route("/graphql", graphql_app),
]
api = Starlette(routes=routes)
if __name__ == "__main__":
uvicorn.run(api, host="127.0.0.1", port=int(os.environ.get("PORT", 8080)))
If you then go to http://localhost:8080/graphq and enter the following query
query Humans{
result {
episode
characters {
... on Human {
name
}
}
}
}
I get this error
{
"data": {
"result": {
"episode": 3,
"characters": null
}
},
"errors": [
{
"message": "Abstract type Characters must resolve to an Object type at runtime for field SearchResult.characters with value \"[{'type': 'Droid', 'name': 'R2-D2', 'primaryFunction': 'Astromech'}, {'type': 'Human', 'name': 'Luke Skywalker', 'homePlanet': 'Tatooine'}, {'type': 'Starship', 'name': 'Millennium Falcon', 'length': 35}]\", received \"None\".",
"locations": [
{
"line": 4,
"column": 5
}
]
}
]
}
which I am now stuck with. Maybe someone has done this already and can help out? How can I resolve this at runtime. I have already tried different approaches for example I changed classes Character and RootQuery:
class Character(Union):
class Meta:
types = (Human, Droid, Starship)
def __init__(self, data, *args, **kwargs):
super().__init__(*args, **kwargs)
self.data = data
self.type = data.get("type")
def resolve_type(self, info):
if self.type == "Human":
return Human
if self.type == "Droid":
return Droid
if self.type == "Starship":
return Starship
class RootQuery(ObjectType):
result = Field(SearchResult)
#staticmethod
def resolve_result(_, info):
return {**mock_data, "characters": [Character(character) for character in mock_data.get('characters')]}
resulting in
{
"data": {
"result": {
"episode": 3,
"characters": [
{},
{
"name": null
},
{}
]
}
}
}
Any ideas would be very appreciated!

jkimbo answered the question here:
class Character(Union):
class Meta:
types = (Human, Droid, Starship)
#classmethod
def resolve_type(cls, instance, info):
if instance["type"] == "Human":
return Human
if instance["type"] == "Droid":
return Droid
if instance["type"] == "Starship":
return Starship
class RootQuery(ObjectType):
result = Field(SearchResult)
def resolve_result(_, info):
return mock_data
Note I'm just returning mock_data and I've updated the resolve_type method to switch based on the data. The Union type uses the same resolve_type method as Interface to figure out what type to resolve to at runtime: https://docs.graphene-python.org/en/latest/types/interfaces/#resolving-data-objects-to-types

list array of objects using python flask

i have a payload as shown below which is stored in mongodb
{
"_id" : ObjectId("5865fbf5558b670ac091c81e"),
"sensors" : [
{
"sensorStatus" : "green ",
"sensorName" : "s1"
},
{
"sensorStatus" : "red ",
"sensorName" : "s2"
}
],
"camera" : [
{
"cameraName" : "cam1",
"cameraStatus" : "live"
},
{
"cameraName" : "cam2",
"cameraStatus" : "live"
}
],
"checkpoints" : [
{
"checkPointName" : "chk1"
}
]
}
trying to write route to display this data as shown below
#gateway_bp.route('/gateway',methods=['GET'])
def list_gateWay():
gateways = Gateway.query.all()
print gateways
return Response(json.dumps(gateways), mimetype='application/json')
i am getting the error has
TypeError: <app.model.canvasmodel.Gateway object at 0x02E99D10> is not JSON serializable
the schema is as shown below
from app.dbconfig.extensions import db
class Sensors(db.Document):
sensorName = db.StringField()
sensorStatus = db.StringField()
class Camera(db.Document):
cameraName = db.StringField()
cameraStatus = db.StringField()
class Checkpoints(db.Document):
checkPointName = db.StringField()
class Gateway(db.Document):
sensors = db.ListField(db.DocumentField(Sensors), db_field='sensors')
camera = db.ListField(db.DocumentField(Camera), db_field='camera')
checkpoints = db.ListField(db.DocumentField(Checkpoints), db_field='checkpoints')
please help to correct the get request thanks

Projection using MongoEngine Raw-Query

Does anyone know, how I can implement the following MongoDB query using a MongoEngine Raq-Query?
db.getCollection('subscribers').find({
'_id': ObjectId("579e60b0c525fd2037e8dd31"),
'history.content.read_process_msg': {
'$exists':true
},
'history.content.read_processed': {
'$exists':true
},
'history.content.read_processed': false
},
{'history.$':1})
I read, that the raw-query doesn't support projections and that one should use .only() instead. But the problem here is, that it returns all the empty documents also…
Any advice?
Edit: Here are my models and a sample document:
class Subscriber(Document):
service = StringField()
history = EmbeddedDocumentListField('SubscriberHistory')
def __str__(self):
return self.service
class SubscriberHistory(EmbeddedDocument):
action = StringField()
content = DictField()
def __str__(self):
return self.action
And the sample:
{
"_id" : ObjectId("579e60b0c525fd2037e8dd31"),
"service" : "foo",
"history" : [
{
"action" : "outbound",
"content" : {
"read_processed" : false,
"message_data" : {
"text" : "w00t?"
},
"read_process_msg" : {
"$ref" : "bots_messages",
"$id" : ObjectId("57a6529dc525fd8066ee25b3")
}
},
"created_at" : ISODate("2016-08-06T21:12:00.986Z")
}
]
}