Projection data is not mapped correctly on Hibernate 5.0 [DATAJPA-1309]

[spring-projects-issues]

Phil Webb opened DATAJPA-1309 and commented

Incorrectly mapped values on page summaries.

See spring-projects/spring-boot#12720 for a test that reproduces the error.

The problem seems to come from this line in the test

Page<HotelSummary> hotels = this.repository.findByCity(city,
		new PageRequest(0, 10, Direction.ASC, "name"));

For some reason the HotelSummary seems to have data mapped to the wrong methods. Digging in a bit, the problem appears to be somewhere in org.springframework.data.repository.query.ResultProcessor. Specifically getProjectionTarget is called with a source containing the following:

[Atlanta,GA,USA, Doubletree, 2.0]

And attempts to convert it using toMap. This gets passed the following names:

[averageRating, city, name]

There are not in the same order. Perhaps DefaultProjectionInformation.collectDescriptors is not returning methods in a defined order. Possibly related to SPR-16675?

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Issue Links:

• DATACMNS-1284 Backport ASM-based property detection for projections

Backported to: 1.11.11 (Ingalls SR11)

[spring-projects-issues]

Phil Webb commented

It's not directly related to SPR-16675. Rolling back to SR10 gives a green build

[spring-projects-issues]

Oliver Drotbohm commented

That's resolved with the backport of DATACMNS-1206 tracked in DATACMNS-1284. We strongly recommend to upgrade to a recent Hibernate, even if on Boot 1.5