jpa @Query中获得方法的实体参数的各个属性

Question

错误的代码片段：

@Query(value = "select g from Game g where g.delFlag=0 and "
        + "if(:game.name !='',g.name= :game.name,1=1)")
Collection<GameView> findTest(@Param("game") Game game);

我想在@Query的查询语句里直接取出Game里的name做判断条件，网上看的例子是：

@Query("select u from User u where u.firstname = :#{#customer.firstname}")
List<User> findUsersByCustomersFirstname(@Param("customer") Customer customer);

照着例子写好报错：

Caused by: org.hibernate.hql.internal.ast.QuerySyntaxException: unexpected AST node: ( near line 1, column 74 [select g from org.SpringLearn.entity.game.Game g where g.delFlag=0 and if(:__$synthetic$__1 !='',g.name= :__$synthetic$__2,1=1)]
    at org.hibernate.hql.internal.ast.QuerySyntaxException.convert(QuerySyntaxException.java:74) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
    at org.hibernate.hql.internal.ast.ErrorTracker.throwQueryException(ErrorTracker.java:93) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.analyze(QueryTranslatorImpl.java:277) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.doCompile(QueryTranslatorImpl.java:191) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
    at org.hibernate.hql.internal.ast.QueryTranslatorImpl.compile(QueryTranslatorImpl.java:143) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
    at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:119) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
    at org.hibernate.engine.query.spi.HQLQueryPlan.<init>(HQLQueryPlan.java:80) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
    at org.hibernate.engine.query.spi.QueryPlanCache.getHQLQueryPlan(QueryPlanCache.java:153) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
    at org.hibernate.internal.AbstractSharedSessionContract.getQueryPlan(AbstractSharedSessionContract.java:595) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
    at org.hibernate.internal.AbstractSharedSessionContract.createQuery(AbstractSharedSessionContract.java:704) ~[hibernate-core-5.3.7.Final.jar:5.3.7.Final]
    ... 176 common frames omitted

求大神解答