I keep getting a request error: 'Request' object has no attribute 'get'

python 3.6 pipenv ubuntu 16.04 mysql 5.7

my packages:

[packages]
flask-graphql = "*"
flask-sqlalchemy = "*"
sqlalchemy-fulltext-search = "*"
graphene-sqlalchemy = ">=2.0"
flask-restful = "*"
flask-marshmallow = "*"
sqlalchemy-pagination = "*"

my code:

from graphene import ObjectType, Schema, relay, Field
from graphene_sqlalchemy import SQLAlchemyObjectType, SQLAlchemyConnectionField
from app.domain.model import Material, Grupo, Classe, Pdm

class MaterialType(SQLAlchemyObjectType):
    class Meta:
        model = Material
        interfaces = (relay.Node, )


class PdmType(SQLAlchemyObjectType):
    class Meta:
        model = Pdm
        interfaces = (relay.Node,)


class ClasseType(SQLAlchemyObjectType):
    class Meta:
        model = Classe
        interfaces = (relay.Node, )


class GrupoType(SQLAlchemyObjectType):
    class Meta:
        model = Grupo
        interfaces = (relay.Node, )


class Query(ObjectType):
    node = relay.Node.Field()
    materiais = SQLAlchemyConnectionField(MaterialType)
    pdms = SQLAlchemyConnectionField(PdmType)
    classes = SQLAlchemyConnectionField(ClasseType)
    grupos = SQLAlchemyConnectionField(GrupoType)
    material = Field(GrupoType)
    pdm = Field(PdmType)
    classe = Field(ClasseType)
    grupo = Field(GrupoType)

schema = Schema(query=Query, types=[MaterialType, PdmType, ClasseType, GrupoType])

import os
from flask import Flask
from flask_sqlalchemy import SQLAlchemy
from app.domain.model import Base

app = Flask(__name__)
app.config['SQLALCHEMY_DATABASE_URI'] = connection_string
db = SQLAlchemy(app, metadata=Base.metadata)

app.add_url_rule('/graphql', view_func=GraphQLView.as_view('graphql', schema=schema, graphiql=True))

my error:

An error occurred while resolving field Query.materiais
Traceback (most recent call last):
  File "/home/jhon/.local/share/virtualenvs/crm_api-CGOvMSyN/lib/python3.5/site-packages/graphql/execution/executor.py", line 311, in resolve_or_error
    return executor.execute(resolve_fn, source, info, **args)
  File "/home/jhon/.local/share/virtualenvs/crm_api-CGOvMSyN/lib/python3.5/site-packages/graphql/execution/executors/sync.py", line 7, in execute
    return fn(*args, **kwargs)
  File "/home/jhon/.local/share/virtualenvs/crm_api-CGOvMSyN/lib/python3.5/site-packages/graphene_sqlalchemy/fields.py", line 36, in connection_resolver
    iterable = cls.get_query(model, info, **args)
  File "/home/jhon/.local/share/virtualenvs/crm_api-CGOvMSyN/lib/python3.5/site-packages/graphene_sqlalchemy/fields.py", line 20, in get_query
    return get_query(model, info.context)
  File "/home/jhon/.local/share/virtualenvs/crm_api-CGOvMSyN/lib/python3.5/site-packages/graphene_sqlalchemy/utils.py", line 13, in get_query
    session = get_session(context)
  File "/home/jhon/.local/share/virtualenvs/crm_api-CGOvMSyN/lib/python3.5/site-packages/graphene_sqlalchemy/utils.py", line 7, in get_session
    return context.get('session')
  File "/home/jhon/.local/share/virtualenvs/crm_api-CGOvMSyN/lib/python3.5/site-packages/werkzeug/local.py", line 347, in __getattr__
    return getattr(self._get_current_object(), name)
AttributeError: 'Request' object has no attribute 'get'
Traceback (most recent call last):
  File "/home/jhon/.local/share/virtualenvs/crm_api-CGOvMSyN/lib/python3.5/site-packages/graphql/execution/executor.py", line 330, in complete_value_catching_error
    exe_context, return_type, field_asts, info, result)
  File "/home/jhon/.local/share/virtualenvs/crm_api-CGOvMSyN/lib/python3.5/site-packages/graphql/execution/executor.py", line 383, in complete_value
    raise GraphQLLocatedError(field_asts, original_error=result)
graphql.error.located_error.GraphQLLocatedError: 'Request' object has no attribute 'get'

Am i doing something wrong?

[kigen]

This is an issue with db session, I also had the same issue.

I wish you had posted your models here also so that see how you’ve set up your Base object.

db_session` = scoped_session(sessionmaker(autocommit=False,
                                         autoflush=False,
                                         bind=engine)) 

Base = declarative_base()
Base.query = db_session.query_property()

The key to solving your issue is this… Base.query = db_session.query_property()

[aliwo]

it seems get_context also works for flask-graphql

app.add_url_rule('/graphql', view_func=GraphQLView.as_view('graphql', schema=schema, graphiql=True, get_context=lambda: {'session':Session()}))

the Session() func retrives SqlalchemySession from g (my custom function)