Rob Fellows created NIFI-16217:
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Summary: UI - Unsaved Parameter Context changes silently lost when
navigating to an inherited Parameter Context
Key: NIFI-16217
URL: https://issues.apache.org/jira/browse/NIFI-16217
Project: Apache NiFi
Issue Type: Bug
Components: Core UI
Reporter: Rob Fellows
Assignee: Rob Fellows
h2. In the Edit Parameter Context dialog, unsaved edits are silently discarded
in the following sequence:
# Open Parameter Context A for edit and change a local parameter (do not click
Apply).
# On an inherited parameter, use **Go to** to open Parameter Context B (the
inherited context).
# In Parameter Context B, click Apply.
Only changes made in step 2's destination context are saved. The unsaved change
from step 1 in Parameter Context A is lost with no warning or confirmation.
h3. Expected behavior
When navigating away from an Edit Parameter Context dialog that has unsaved
changes (for example via **Go to** on an inherited parameter), the UI should
either:
- prompt the user to save or discard pending changes before navigating, or
- otherwise prevent silent loss of those changes
consistent with save-before-leaving patterns used elsewhere in the UI.
h3. Notes
Parameter Context updates are asynchronous (submit / poll / delete update
request) and the edit dialog shows a review/progress UI after Apply. Any fix
should account for that flow rather than assuming a simple synchronous save.
h3. Steps to reproduce
# Create Parameter Context B with at least one parameter.
# Create Parameter Context A that inherits from B.
# Edit Parameter Context A, modify a local parameter, and do **not** Apply.
# In the Parameters table, open the menu on an inherited parameter and choose
**Go to**.
# Observe that navigation proceeds immediately to Parameter Context B with no
prompt.
# Optionally Apply on B, then return to A — the earlier local edit is gone.
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