Deprecate app.param(fn)
Problem
This is a discussion for the deprecation of the `app.param(fn)` signature. To me, it solves a problem that doesn't exist. I would like to hear arguments to keep it around, hopefully with a use-case it actually solves, before it gets deprecated.
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1 Fix
Evaluate and Document Use Cases for app.param(fn) Before Deprecation
The `app.param(fn)` signature in Express is being considered for deprecation due to a perceived lack of necessity. However, it may still serve specific use cases that are not widely recognized or documented. This could lead to the removal of a feature that some developers rely on, potentially breaking existing applications.
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- 1
Conduct a Use Case Survey
Create a survey targeting Express users to gather insights on how they utilize `app.param(fn)`. Focus on identifying specific scenarios where this function is beneficial.
- 2
Analyze Survey Results
Compile and analyze the survey results to identify common patterns or unique use cases that justify the existence of `app.param(fn)`. Document these findings for review.
- 3
Create Documentation for Valid Use Cases
Based on the survey results, draft comprehensive documentation that illustrates valid use cases for `app.param(fn)`. Include code examples and scenarios where it provides a clear benefit.
javascriptapp.param('userId', (req, res, next, id) => { /* logic to fetch user */ }); - 4
Engage the Community for Feedback
Share the findings and documentation with the Express community through forums and GitHub discussions. Encourage feedback and additional use cases to further validate the necessity of `app.param(fn)`.
- 5
Review and Decide on Deprecation
After gathering community feedback and analyzing the documented use cases, hold a review meeting with the core team to decide whether to proceed with deprecation or to retain `app.param(fn)`.
Validation
Confirm the fix by ensuring that the documentation is updated and that community feedback has been collected. Monitor discussions for any additional use cases that emerge, and evaluate the decision made regarding the deprecation.
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Submitted by
Alex Chen
2450 rep