将两个 OR 查询与 Mongoose 中的 AND 结合起来 [英] Combine two OR-queries with AND in Mongoose
问题描述
我想在 Monoose 中将两个 OR 查询与 AND 结合起来,就像在这个 SQL 语句中一样:
I want to combine two OR-queries with AND in Monoose, like in this SQL statement:
SELECT * FROM ... WHERE (a = 1 OR b = 1) AND (c=1 OR d=1)
我在 NodeJS 模块中尝试了这个,它只从主应用程序获取模型对象:
I tried this in a NodeJS module which only gets the model object from the main application:
/********** Main application ***********/
var query = MyModel.find({});
myModule1.addCondition(query);
myModule2.addCondition(query);
query.exec(...)
/************ myModule1 ***************/
exports.addCondition = function(query) {
query.or({a: 1}, {b: 1});
}
/************ myModule2 ***************/
exports.addCondition = function(query) {
query.or({c: 1}, {d: 1});
}
但这行不通,所有的 OR 条件都会像这条 SQL 语句一样连接在一起:
But this doesn't work, all OR-conditions will get joined together like in this SQL statement:
SELECT * FROM ... WHERE a = 1 OR b = 1 OR c=1 OR d=1
如何在 Mongoose 中将 myModule1
和 myModule2
的两个条件与 AND 结合起来?
How can I combine the two conditions of myModule1
and myModule2
with AND in Mongoose?
推荐答案
直接创建查询对象可能是最简单的:
It's probably easiest to create your query object directly as:
Test.find({
$and: [
{ $or: [{a: 1}, {b: 1}] },
{ $or: [{c: 1}, {d: 1}] }
]
}, function (err, results) {
...
}
但您也可以使用 Query#and
在最近的 3.x Mongoose 版本中可用的帮助程序:
But you can also use the Query#and
helper that's available in recent 3.x Mongoose releases:
Test.find()
.and([
{ $or: [{a: 1}, {b: 1}] },
{ $or: [{c: 1}, {d: 1}] }
])
.exec(function (err, results) {
...
});
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