在 @Query Spring 数据 mongo 中使用 OR 时的问题

Question

我的存储库中有以下方法：

@Query(value = "{ '$or' : [ ?0 ]}") List<MyObject> findByObject(String lookupKeyValuePairs);

我将以下字符串作为输入传递给此方法。

字符串：{ 'keyone': 'one','keytwo': 'one' },{ 'keyone': 'two','keytwo': 'two' }

我希望查询是 { '$or' : [ { 'keyone': 'one','keytwo': 'one' },{ 'keyone': 'two','keytwo': 'two' } ]}，但 spring 正在评估上述查询

org.springframework.data.mongodb.core.MongoTemplate - find using query: { "$or" : ["{ 'keyone': 'one','keytwo': 'one' },{ 'keyone': 'two','keytwo': 'two' }"] } fields: Document{{}} for class: MyClass in collection: MyCollection

并抛出以下异常： Caused by: com.mongodb.MongoQueryException: Query failed with error code 2 and error message '$or/$and/$nor entries need to be full objects' on server

它是动态参数。键值对每次都会改变。这就是为什么我将整个内容作为字符串传递。

谁能帮忙指出问题出在哪里？

Answer 1

您可以将它们作为单独的参数传递吗？

@Query("{ '$or' : [ { 'keyone': ?0,'keytwo': ?1},{ 'keyone': ?2,'keytwo': ?3 } ]}") 
List<MyObject> findByObject(String param0, String param1, String param2, String param3);

repo.findByObject('one', 'one', 'two', 'two');

或

@Query("{ '$or' : [ { ?0: ?1, ?2: ?3},{ ?4: ?5, ?6: ?7 } ]}") 
List<MyObject> findByObject(String param0, String param1, String param2, String param3, String param4, String param5, String param6, String param7);

repo.findByObject('keyone', 'one', 'keytwo', 'one','keyone', 'two', 'keytwo', 'two');

或

---

使用条件 api 传递动态查询参数的选项

import java.util.List;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.data.mongodb.core.MongoOperations;
import org.springframework.data.mongodb.core.query.Criteria;
import org.springframework.data.mongodb.core.query.Query;
import org.springframework.data.util.Pair;
import org.springframework.stereotype.Service;

@Service
public class MyObjectService {

    @Autowired
    private MongoOperations mongoOps;

    public List<MyObject> findByObject(List<Pair<String, String>> orParams) {

        Criteria[] orCriteria = orParams.stream()
            .map(param -> Criteria.where(param.getFirst()).is(param.getSecond()))
            .toArray(Criteria[]::new);

        final List<MyObject> results = mongoOps.find(Query.where(new Criteria().orOperator(orCriteria)), MyObject.class);
        return results;

    }
}

---

List<MyObject> results = service.findByObject(List.of(
    Pair.of("keyone", "one"), 
    Pair.of("keytwo", "one"), 
    Pair.of("keyone", "two"), 
    Pair.of("keytwo", "two")
));