From e81a4b55f8b8e37d1c161fd6feb5fdd271a600a5 Mon Sep 17 00:00:00 2001
From: Kaxil Naik <kaxilnaik@gmail.com>
Date: Thu, 21 May 2020 12:11:06 +0100
Subject: [PATCH] Add note in Updating.md about the removel of DagRun.ID_PREFIX

---
 UPDATING.md | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/UPDATING.md b/UPDATING.md
index e4e6c5f0b8b64..a4c324edcf7e3 100644
--- a/UPDATING.md
+++ b/UPDATING.md
@@ -101,6 +101,30 @@ To maintain consistent behavior, both successful or skipped downstream task can
 `wait_for_downstream=True` flag.
 
 
+### Use DagRunType.SCHEDULED.value instead of DagRun.ID_PREFIX
+
+All the run_id prefixes for different kind of DagRuns have been grouped into a single
+enum in `airflow.utils.types.DagRunType`.
+
+Previously, there were defined in various places, example as `ID_PREFIX` class variables for
+`DagRun`, `BackfillJob` and in `_trigger_dag` function.
+
+Was:
+
+```python
+>> from airflow.models.dagrun import DagRun
+>> DagRun.ID_PREFIX
+scheduled__
+```
+
+Replaced by:
+
+```python
+>> from airflow.utils.types import DagRunType
+>> DagRunType.SCHEDULED.value
+scheduled
+```
+
 ### Ability to patch Pool.DEFAULT_POOL_NAME in BaseOperator
 It was not possible to patch pool in BaseOperator as the signature sets the default value of pool
 as Pool.DEFAULT_POOL_NAME.