### Body

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(permissions.ACTION_CAN_EDIT, permissions.RESOURCE_DAG),
            (permissions.ACTION_CAN_CREATE, permissions.RESOURCE_DAG_RUN),
        ]
    )
    @action_logging
    @provide_session
    def trigger(self, dag_id: str, session: Session = NEW_SESSION):
        """Triggers DAG Run."""
        run_id = request.values.get("run_id", "").replace(" ", "+")
        origin = get_safe_url(request.values.get("origin"))
        unpause = request.values.get("unpause")
        request_conf = request.values.get("conf")
        request_execution_date = request.values.get("execution_date", default=timezone.utcnow().isoformat())
        is_dag_run_conf_overrides_params = conf.getboolean("core", "dag_run_conf_overrides_params")
        dag = get_airflow_app().dag_bag.get_dag(dag_id)
        dag_orm: DagModel = session.scalar(select(DagModel).where(DagModel.dag_id == dag_id).limit(1))
        
        form_fields = {}
        for k, v in dag.params.items():
            form_fields[k] = v.dump()
            
            if "schema" not in form_fields[k]:
                form_fields[k]["schema"] = {}
            if "type" not in form_fields[k]["schema"]:
                if isinstance(form_fields[k]["value"], bool):
                    form_fields[k]["schema"]["type"] = "boolean"
                elif isinstance(form_fields[k]["value"], int):
                    form_fields[k]["schema"]["type"] = ["integer", "null"]
                elif isinstance(form_fields[k]["value"], list):
                    form_fields[k]["schema"]["type"] = ["array", "null"]