How to correctly register Flask blueprints with validation?

[guilhermeschmitd-hotmart]

From the examples I understand the need to use the @api.validate decorator on each route declaration to make use of schema validation.
I'm using an app factory pattern with blueprints for my project, but haven't been able to register all endpoints correctly in order for them to show in the docs.
Validation works across different routes, but only the first route registered within the app shows in the swagger documentation.

Here's an example app.py file:

# ./app.py
from flask import Flask

from routes.foo import bp as foo
from routes.bar import bp as bar

from spectree import SpecTree

def create_app():
    app = Flask(__name__)
    api = SpecTree('flask')

    # Register blueprints here
    app.register_blueprint(foo)
    app.register_blueprint(bar)

    @app.route('/health')
    def health():
        return '👍'

    api.register(app=app)

    return app

And the route definitions:

# ./routes/foo.py
from pydantic import BaseModel
from spectree import SpecTree, Response
from flask import Blueprint

class FooRequestV1(BaseModel):
    session_id: str
    content: str

class FooResponseV1(BaseModel):
    session_id: str
    response: str

bp = Blueprint('foo', __name__)
api = SpecTree('flask', app=bp)

@bp.route('/v1/foo', methods=['POST'])
@api.validate(json=FooRequestV1, resp=Response(HTTP_200=FooResponseV1, HTTP_403=None, HTTP_204=None))
def foo():
# ...

# ./routes/bar.py
from pydantic import BaseModel
from spectree import SpecTree, Response
from flask import Blueprint

class BarRequestV1(BaseModel):
    session_id: str
    content: str

class BarResponseV1(BaseModel):
    session_id: str
    response: str

bp = Blueprint('bar', __name__)
api = SpecTree('flask', app=bp)

@bp.route('/v1/bar', methods=['POST'])
@api.validate(json=BarRequestV1, resp=Response(HTTP_200=BarResponseV1, HTTP_403=None, HTTP_204=None))
def bar():
# ...

What am I missing here? do I need a global instance of SpecTree() somehow?

[guilhermeschmitd-hotmart]

Ok, so I've immediately tried my own suggestion and created a single instance of SpecTree in a routes/spec.py file that can be imported from across the app to register endpoints and set up validation.

Rubber ducking really is extremely useful. Leaving this here so hopefully it can be useful to someone else in the future 😃