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| -rw-r--r-- | doc/development/query_recorder.md | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/doc/development/query_recorder.md b/doc/development/query_recorder.md index a6b60149ea4..4fbf289b596 100644 --- a/doc/development/query_recorder.md +++ b/doc/development/query_recorder.md @@ -36,6 +36,13 @@ it "avoids N+1 database queries" do end ``` +## Use request specs instead of controller specs + +Use a [request spec](https://relishapp.com/rspec/rspec-rails/v/3-8/docs/request-specs/request-spec) when writing a N+1 test on the controller level. + +Controller specs should not be used to write N+1 tests as the controller is only initialized once per example. +This could lead to false successes where subsequent "requests" could have queries reduced (e.g. because of memoization). + ## Finding the source of the query It may be useful to identify the source of the queries by looking at the call backtrace. |