Sonson123 Sonson123 - 1 month ago 5
Node.js Question

Combine two OR-queries with AND in Mongoose

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)


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});
}


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


How can I combine the two conditions of
myModule1
and
myModule2
with AND in Mongoose?

Answer

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) {
      ...
  }

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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