Please Add Further Support for FastAPI or Pydantic ObjectTypes

I want to avoid repeating code fragments between the mutations and types with graphene in a FastAPI app.

Not a very polished example but please see below sample scenario.

**graphql\mutations.py**

import graphene

from models.customers import CustomerLogin, CustomerLogin_PydanticIn
from graphql.types import CustomerLoginType


class CreateUserMutation(graphene.Mutation):
class Arguments:
id = graphene.Int()
shard_id = graphene.Decimal()
seq_num = graphene.Decimal()
event_timedate = graphene.DateTime()
user_id = graphene.UUID()
device_token = graphene.UUID()
user_ip = graphene.String()
user_agent = graphene.String()
client_id = graphene.String()
process = graphene.String()
auth_result = graphene.String()
auth_fail_cause = graphene.String()
plain_email = graphene.String()

user = graphene.Field(CustomerLoginType)

@staticmethod
async def mutate(parent, info, user: CustomerLogin_PydanticIn):
user = await CustomerLogin.create(**user.dict())
return CreateUserMutation(user=user)

**graphql\types.py**

import graphene


# Fields should coincide with model.CustomerLogin
class CustomerLoginType(graphene.ObjectType):
id = graphene.Int()
shard_id = graphene.Decimal()
seq_num = graphene.Decimal()
event_timedate = graphene.DateTime()
user_id = graphene.UUID()
device_token = graphene.UUID()
user_ip = graphene.String()
user_agent = graphene.String()
client_id = graphene.String()
process = graphene.String()
auth_result = graphene.String()
auth_fail_cause = graphene.String()
plain_email = graphene.String()

**graphql\queries.py**

import graphene

from models.customers import CustomerLogin
from graphql.types import CustomerLoginType


class Query(graphene.ObjectType):

all_customer_logins = graphene.List(CustomerLoginType)
single_customer_login = graphene.Field(CustomerLoginType, id=graphene.Int())

@staticmethod
async def resolve_all_customer_logins(parent, info):
users = await CustomerLogin.all()
return users

@staticmethod
async def resolve_single_customer_login(parent, info, id):
user = await CustomerLogin.get(id=id)
return user

Then the ORM model using TortoiseORM

**models\customers.py**

from tortoise import fields
from tortoise.contrib.pydantic import pydantic_model_creator
from tortoise.models import Model

from models.events import ShardID, SequenceNum


class CustomerLogin(Model):
shard_id: fields.ForeignKeyNullableRelation[ShardID] = \
fields.ForeignKeyField(model_name='models.ShardID',
related_name='customerlogin_shardid',
to_field='shard_id',
on_delete=fields.RESTRICT,
null=True)
seq_num: fields.ForeignKeyNullableRelation[SequenceNum] = \
fields.ForeignKeyField(model_name='models.SequenceNum',
related_name='customerlogin_seqnum',
to_field='seq_num',
on_delete=fields.RESTRICT,
null=True)
event_timedate = fields.DatetimeField(null=True)
user_id = fields.UUIDField(null=True)
device_token = fields.UUIDField(null=True)
user_ip = fields.CharField(256, null=True)
user_agent = fields.CharField(1024, null=True)
client_id = fields.CharField(256, null=True)
process = fields.CharField(256, null=True)
auth_result = fields.CharField(256, null=True)
auth_fail_cause = fields.CharField(256, null=True)
plain_email = fields.CharField(256, null=True)


CustomerLogin_Pydantic = pydantic_model_creator(CustomerLogin, name='CustomerLogin')
CustomerLogin_PydanticIn = pydantic_model_creator(CustomerLogin, name='CustomerLoginIn', exclude_readonly=True)

El ejemplo abarca graphql/mutations.py, graphql/types.py, graphql/queries.py y models/customers.py, y utiliza pydantic_model_creator de TortoiseORM; empieza rastreando cómo se declaran actualmente los Graphene ObjectTypes y los argumentos de las mutaciones. Define la integración compatible de FastAPI/Pydantic y sus criterios de finalización antes de proponer una implementación, ya que el issue no especifica un punto de entrada objetivo ni pruebas.

Escrito por el modelo de indexación a partir del texto del issue.