Question

我正在尝试使用休眠条件查询在三个字段上执行基本的“OR”。

实施例

class Whatever{
 string name;
 string address;
 string phoneNumber;
}

我想构建一个条件查询，我的搜索字符串可以匹配“name”或“address”或“phoneNumber”。

Answer 1

您想使用Restrictions.disjuntion()。像这样

session.createCriteria(Whatever.class)
    .add(Restrictions.disjunction()
        .add(Restrictions.eq("name", queryString))
        .add(Restrictions.eq("address", queryString))
        .add(Restrictions.eq("phoneNumber", queryString))
    );

请参阅Hibernate doc here。

Answer 2

假设您有一个hibernate会话，那么类似下面的内容应该有效：

Criteria c = session.createCriteria(Whatever.class);
Disjunction or = Restrictions.disjunction();
or.add(Restrictions.eq("name",searchString));
or.add(Restrictions.eq("address",searchString));
or.add(Restrictions.eq("phoneNumber",searchString));
c.add(or);

Answer 3

    //Expression :  (c1 AND c2) OR (c3)      


     Criteria criteria = session.createCriteria(Employee.class);

      Criterion c1 = Restrictions.like("name", "%e%");
      Criterion c2 = Restrictions.ge("salary", 10000.00);
      Criterion c3 = Restrictions.like("name", "%YYY%");
      Criterion c4 = Restrictions.or(Restrictions.and(c1, c2), c3);
      criteria.add(c4);

//可以为（c1 OR c2）AND c3或任何复杂表达式做同样的事情。

Answer 4

//Expression :  (c1 AND c2) OR (c3)      


 Criteria criteria = session.createCriteria(Employee.class);

  Criterion c1 = Restrictions.like("name", "%e%");
  Criterion c2 = Restrictions.ge("salary", 10000.00);
  Criterion c3 = Restrictions.like("name", "%YYY%");
  Criterion c4 = Restrictions.or(Restrictions.and(c1, c2), c3);
  criteria.add(c4);

  //Same thing can be done for (c1 OR c2) AND c3, or any complex expression.

Answer 5

以防万一有人应该为NHibernate提出同样的问题：

ICriteria c = session.CreateCriteria(typeof (Whatever))
    .Add(Expression.Disjunction()
        .Add(Expression.Eq("name", searchString))
        .Add(Expression.Eq("address", searchString))
        .Add(Expression.Eq("phoneNumber", searchString)));

Answer 6

可以使用or和/和不同级别的查询来应用条件使用disjunction

Criteria query = getCriteria("ENTITY_NAME");
query.add(Restrictions.ne("column Name", current _value));

Disjunction disjunction = Restrictions.disjunction();

if (param_1 != null)
    disjunction.add(Restrictions.or(Restrictions.eq("column Name", param1)));

if (param_2 != null)
    disjunction.add(Restrictions.or(Restrictions.eq("column Name", param_2)));

if (param_3 != null)
    disjunction.add(Restrictions.or(Restrictions.eq("column Name", param_3)));
if (param_4 != null && param_5 != null)
    disjunction.add(Restrictions.or(Restrictions.and(Restrictions.eq("column Name", param_4 ), Restrictions.eq("column Name", param_5 ))));

if (disjunction.conditions() != null && disjunction.conditions().iterator().hasNext())
    query.add(Restrictions.and(disjunction));

return query.list();

Answer 7

如果某人使用CriteriaQuery而不是Criteria，则可以将所有表达式放在Predicate列表中，并按谓词大小将OR放置如下：

List<Predicate> predicates = new ArrayList<>();
if (...) {
  predicates.add(...);
}

criteriaQuery.where(cb.or(predicates.toArray(new Predicate[predicates.size()])));

Answer 8

这对我来说，对于OR条件是起作用的，对于IN条件也是如此，而不是在此讨论中投票最多的答案：

criteria.add( Restrictions.or(
                    Restrictions.eq(ch.getPath(ch.propertyResolver().getXXXX()), "OR_STRING"),
                        Restrictions.in(ch.getPath(ch.propertyResolver().getYYYY()), new String[]{"AA","BB","CC"})
                    ));

结果查询：

  and (
            this_.XXXX=? 
            or this_.YYYY in (
                ?, ?, ?
            )
        )

在使用带有hibernate的条件查询时，如何将“OR”标准放在一起？

8 个答案: