javascript - Parse - 创建两个 OR 查询的 AND 查询

Question

我需要在 Parse.com(伪语言)中执行以下查询:

select all posts where 
  (expired < today OR expired not exists) 
  AND 
  (owner is {user} OR commenter contains {user})

我知道在 Javascript 中我可以使用 Parse.Query.or 创建两个 OR 查询，但是因为似乎没有 Parse.Query.and变体，我不知道如何将这两个 OR 查询组合成一个查询。

其他人建议简单地多次使用 equalTo 来创建 AND 语句，但这不适用于组合 OR 查询。

Answer 1

我不熟悉 Parse，这对于评论来说太长了，但请参阅下面的 documentation ;特别是最后一句话似乎就是您所追求的。

Compound Queries

If you want to find objects that match one of several queries, you can use Parse.Query.or method to construct a query that is an OR of the queries passed in. For instance if you want to find players who either have a lot of wins or a few wins, you can do:

var lotsOfWins = new Parse.Query("Player");
lotsOfWins.greaterThan("wins", 150);

var fewWins = new Parse.Query("Player");
fewWins.lessThan("wins", 5);

var mainQuery = Parse.Query.or(lotsOfWins, fewWins);
mainQuery.find({
  success: function(results) {
     // results contains a list of players that either have won a lot of games or won only a few games.
  },
  error: function(error) {
    // There was an error.
  }
});

You can add additional constraints to the newly created Parse.Query that act as an 'and' operator.