Give the ability to set any route class when adding a third-party router

[ilyaTT]

No description provided.

[codecov]

Codecov Report

Base: 100.00% // Head: 100.00% // No change to project coverage 👍

Coverage data is based on head (31f8757) compared to base (cf73051).
Patch has no changes to coverable lines.

❗ Current head 31f8757 differs from pull request most recent head 3e11ae6. Consider uploading reports for the commit 3e11ae6 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##            master     #5273    +/-   ##
==========================================
  Coverage   100.00%   100.00%            
==========================================
  Files          540       532     -8     
  Lines        13969     13684   -285     
==========================================
- Hits         13969     13684   -285     

Impacted Files	Coverage Δ
fastapi/routing.py	100.00% <ø> (ø)
tests/main.py	100.00% <0.00%> (ø)
tests/utils.py	100.00% <0.00%> (ø)
fastapi/utils.py	100.00% <0.00%> (ø)
fastapi/encoders.py	100.00% <0.00%> (ø)
tests/test_query.py	100.00% <0.00%> (ø)
fastapi/websockets.py	100.00% <0.00%> (ø)
fastapi/concurrency.py	100.00% <0.00%> (ø)
fastapi/applications.py	100.00% <0.00%> (ø)
... and 25 more

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[github-actions]

📝 Docs preview for commit 31f8757 at: https://62fba191bc6e9e31ddc8dfd8--fastapi.netlify.app

[iudeen]

Any context on why this is needed and what would be the impact?

[ilyaTT]

Any context on why this is needed and what would be the impact?

The routing of our project has a nested structure.
At the lower level, a router with an overridden __init__ was used. However, when importing, we need to use a different route class.
Because everywhere in the project it is possible to pass the route_class_override parameter, then it would be right to allow it here as well.