Java – Spring data query with max limit and condition

javaspringspring-dataspring-data-jpa

I want to get the item with the highest year and has a particular personal name. I'm trying this:

Foo findTopByOrderByYearDesc();

This work great, the problem is when I add a new param to filter results

Foo findTopByOrderByYearDescAndPersonName(@Param("person.name") final String name);

But I get this error:

No property andPersonName found for type Foo!

I try this too but I get de same error:

Foo findTopByOrderByYearDescByPersonName(@Param("person.name") final String name);

Best Answer

You should use the following:

Foo findTopByPersonNameOrderByYearDesc(@Param("person.name") final String name);

The first 'by' keyqord works as a delimiter see here

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Example:

@SuppressWarnings("unchecked")
Map<String, String> myMap = (Map<String, String>) deserializeMap();

There is no way to determine whether the Map really should have the generic parameters <String, String>. You must know beforehand what the parameters should be (or you'll find out when you get a ClassCastException). This is why the code generates a warning, because the compiler can't possibly know whether is safe.

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Any fields you don't want serialized in general you should use the "transient" modifier, and this also applies to json serializers (at least it does to a few that I have used, including gson).

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private transient String name;

Best Answer

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