[release/10.0] Fix Parameter for primitive collections for IEnumerable with nullable type#37257
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Looks OK for the patch, but see #37255 (comment).
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Customer reported. Regression. Straightforward fix with ability to quirk.
This was referenced Dec 2, 2025
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… introduced in dotnet#37257 - Checking for IEnumerable<T> before IEnumerable - Using generic ToList() to preserve collection element type - processedValues should now have the same element type as the input collection (as was before dotnet#37257) Fixes dotnet#37537
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… introduced in dotnet#37257 - Checking for IEnumerable<T> before IEnumerable - Using generic ToList() to preserve collection element type - processedValues should now have the same element type as the input collection (as was before dotnet#37257) Fixes dotnet#37537
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Fixes #37204.
Description
In EF 10 we improved support for primitive collections. We incorrectly assumed that every primitive collection single parameter (using i.e.
OPENJSONas a translation) is going to beIList, which is incorrect in case the collection is i.e. filtered inline in query (Where(x => collection.Where(...).Contains(x.Id))).Customer impact
Queries using
EF.ParameterorUseParameterizedCollectionMode(ParameterTranslationMode.Parameter)withIEnumerablefail to translate, forcing customer to rewrite queries.How found
Customer reported on 10.0.
Regression
Yes.
Testing
Tests added.
Risk
Low. This is targeted fix. Quirk added.