spring-data-jpa - 如何通过示例配置查询以包含空值？

Question

我有以下匹配器:

Example.of(
    user,
    ExampleMatcher.matching()
                  .withMatcher("name", contains().ignoreCase())
                  .withMatcher("phoneNumber", contains())
)

除了 null 之外，它工作正常值。例如，它不返回电话号码为 NULL 的用户。 .

我试图跟随以包含 NULL值，但它不起作用:

Example.of(
    user,
    ExampleMatcher.matching()
                  .withMatcher("name", contains().ignoreCase())
                      .withIncludeNullValues()
                  .withMatcher("phoneNumber", contains())
                      .withIncludeNullValues()
)

生成的SQL如下:

select
    user0_.id as id1_9_,
    user0_.document_expiry_date as document2_9_,
    user0_.document_type as document3_9_,
    user0_.document_url as document4_9_,
    user0_.email as email5_9_,
    user0_.name as name6_9_,
    user0_.phone_number as phone_nu7_9_
from
    user user0_
where
    (lower(user0_.name) like ?)
    and (user0_.id is null)
    and (user0_.document_type is null)
    and (user0_.document_url is null)
    and (user0_.email is null)
    and (user0_.phone_number like ?)
    and (user0_.document_expiry_date is null)

如何配置它以包含带有 NULL 的行列也是？

Answer 1

遇到了同样的问题，但我认为没有办法实现这个目标。下面是 withMatcher 方法的源代码:

public ExampleMatcher withMatcher(String propertyPath, ExampleMatcher.GenericPropertyMatcher genericPropertyMatcher) {
    Assert.hasText(propertyPath, "PropertyPath must not be empty!");
    Assert.notNull(genericPropertyMatcher, "GenericPropertyMatcher must not be empty!");
    ExampleMatcher.PropertySpecifiers propertySpecifiers = new ExampleMatcher.PropertySpecifiers(this.propertySpecifiers);
    ExampleMatcher.PropertySpecifier propertySpecifier = new ExampleMatcher.PropertySpecifier(propertyPath);
    if (genericPropertyMatcher.ignoreCase != null) {
        propertySpecifier = propertySpecifier.withIgnoreCase(genericPropertyMatcher.ignoreCase);
    }

    if (genericPropertyMatcher.stringMatcher != null) {
        propertySpecifier = propertySpecifier.withStringMatcher(genericPropertyMatcher.stringMatcher);
    }

    if (genericPropertyMatcher.valueTransformer != null) {
        propertySpecifier = propertySpecifier.withValueTransformer(genericPropertyMatcher.valueTransformer);
    }

    propertySpecifiers.add(propertySpecifier);
    return new ExampleMatcher(this.nullHandler, this.defaultStringMatcher, propertySpecifiers, this.ignoredPaths, this.defaultIgnoreCase, this.mode);
}

此方法返回一个 ExampleMatcher，其中包含应用于所有字段的“全局”nullHandler。这意味着，您不能为某些特殊字段指定不同的 nullHander。