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I am trying to get data from my mongoDB database by using mongoose filters. The scenario is that each user object in the database has certain fields like "Region" or "Sector".
Currently I am getting all the users that contain the keyword "region" in there object like so:
// Filter all healthcare bios by region
app.get('/user',function(req, res) {
// use mongoose to get all users in the database
User.find({region: "NA"}, function(err, user)
{
// if there is an error retrieving, send the error. nothing after res.send(err) will execute
if (err)
{
res.send(err);
}
// return all todos in JSON format
console.log(user);
res.json(user);
});
});
How can put some conditions in mongoose that it return users that contain both "region" && "Sector" in their objects. Currently its only returning the user which have the region keyword in them.
I have tried using $and operator but I couldn't get it to work.
941
In MongoDB, we can apply the multiple conditions using the and operator. By applying the and operation we will select all the documents that satisfy all the condition expressions. We can use this operator in methods like find(), update() , etc as per the requirement.
The value of the $in operator is an array that contains few values. The document will be matched where the value of the breed field matches any one of the values inside the array.
Model. count() method is deprecated in mongoose version 6.2. 0. If you want to count the number of documents in a collection, e.g. count({}) , use the estimatedDocumentCount() function instead.
The problem that Mongoose aims to solve is allowing developers to enforce a specific schema at the application layer. In addition to enforcing a schema, Mongoose also offers a variety of hooks, model validation, and other features aimed at making it easier to work with MongoDB.
app.get('/user',function(req, res) {
User.find({region: "NA",sector:"Some Sector"}, function(err, user)
{
if (err)
{
res.send(err);
}
console.log(user);
res.json(user);
});
});
If you want data with either region:"NA" or sector:"Some Sector". you can use $or operator.
User.find({$or:[{region: "NA"},{sector:"Some Sector"}]}, function(err, user)
{
if (err)
{
res.send(err);
}
console.log(user);
res.json(user);
});
If you want results that contain any region or sector as long as both are present at the same time you need the following query in your User.find:
{region: {$exists:true},sector: {$exists:true}}
, is the equivalent of $and as long as you are searching different fields.
10
const dateBetweenDates = await Model.find({
$or: [
{
$and: [
{ From: { $gte: DateFrom } },
{ To: { $lte: DateTo } },
], // and operator body finishes
},
{ _id: req.user.id},
], //Or operator body finishes
})
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