anshuksi282-ksolves opened a new pull request, #59231:
URL: https://github.com/apache/airflow/pull/59231
closes: #54800
### Description
This PR restores and enhances the ability to pre-populate the **Trigger
DAG** and **Backfill** forms via URL query parameters in the Airflow 3.0 UI.
This feature existed in Airflow 2.x and is useful for sharing pre-configured
run links.
### Key Changes:
1. **URL Param Parsing:**
* Implemented using the `useSearchParams` hook (replacing manual parsing
logic from stale PRs).
* Added a utility `getTriggerConf` to handle both JSON strings
(`?conf={"a":1}`) and Key-Value pairs (`?a=1`).
2. **Form Updates:**
* **Trigger Form:** Supports `run_id`, `logical_date`, `note`, and
`conf`.
* **Backfill Form:** Supports `from_date`, `to_date`, `max_active_runs`,
`reprocess_behavior`, and `run_backwards`.
* **Config Form:** Automatically expands the "Advanced Options"
accordion if configuration data is present in the URL.
3. **Code Quality:**
* Optimized `RunBackfillForm.tsx` logic to keep the file size strictly
under the 250-line linting limit.
* Ensured consistent naming conventions for backfill parameters
(`from_date` / `to_date`) to match the API and UI components.
4. **Documentation:**
* Updated `docs/core-concepts/params.rst` to document the supported URL
parameters and examples.
### How to reproduce / Test
You can test this by running the UI and navigating to any DAG (e.g.,
`tutorial`) using the following URLs:
**1. Trigger Single Run (JSON Config):**
The modal should open, fields should be filled, and the JSON editor should
show the config.
http://localhost:8080/dags/tutorial/trigger/single?run_id=test_run_01¬e=Testing_Note&conf={"environment":"dev","debug":true}
**2. Trigger Single Run (Key-Value Config):**
The "Advanced Options" should open and show `{"foo": "bar"}`.
http://localhost:8080/dags/tutorial/trigger/single?foo=bar&retry=3
**3. Backfill Form:**
The Backfill form should open with dates, max runs, and the "Run Backwards"
checkbox pre-selected.
http://localhost:8080/dags/tutorial/trigger/backfill?from_date=2024-01-01T00:00:00&to_date=2024-01-05T00:00:00&max_active_runs=5&run_backwards=true
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