Basic Flask Crud

views.py

class AdminFAQView(AdminView):

    def __init__(self):
        self.form = FAQQuestionForm()
        self.questions = db.session.query(Question.id, Question.question).all()

    def get(self, question_id=None):
        form = self.form
        questions = self.questions

        if not question_id:

            return render_template(
                "admin/faq.html",
                questions=questions,
                form=form
            )
        else:
            question = db.session.query(Question).get(question_id)
            if not question:
                flash("No existe esa pregunta", "warning")
                return redirect(url_for("admin.faq"))

            if not "delete" in request.path:
                form.question.data = question.question
                form.answer.data = question.answer

                return render_template(
                    "admin/faq.html",
                    single=question,
                    questions=questions,
                    form=form
                )
            elif "delete" in request.path:
                db.session.delete(question)
                db.session.commit()
                flash("Pregunta del FAQ borrada", "warning")
                return redirect(url_for("admin.faq"))

        

    def post(self, question_id=""):
        form = self.form

        if form.validate_on_submit():
            if not question_id:
                question = Question()
            else:
                question = db.session.query(Question).get(question_id)
            question.question = form.question.data
            question.answer = form.answer.data

            db.session.add(question)
            db.session.commit()

            flash("La pregunta se guardó con éxito", "success")
            return redirect(url_for("admin.faq"))

        flash("El formulario no validó: {}".format(form.errors), "alert")
        return redirect(url_for("admin.faq"))

Si quitas el .all() en la línea 5, el query se vuelve lazy, es decir que no se ejecuta hasta que lo iteras.
Hay varias casos en que no necesitas ejecutar ese query para nada