mongoose findOne code example
Example 1: mongoose findoneandupdate
const doc = await CharacterModel.findOneAndUpdate(
{ name: 'Jon Snow' },
{ title: 'King in the North' },
{ new: true }
);
doc.title;
Example 2: mongoose find() example
await MyModel.find({});
await MyModel.find({ name: 'john', age: { $gte: 18 } }).exec();
MyModel.find({ name: 'john', age: { $gte: 18 }}, function (err, docs) {});
await MyModel.find({ name: /john/i }, 'name friends').exec();
await MyModel.find({ name: /john/i }, null, { skip: 10 }).exec();
Example 3: findbyid mongoose
await Adventure.findById(id).exec();
Adventure.findById(id, function (err, adventure) {});
await Adventure.findById(id, 'name length').exec();
Example 4: mongodb findone
itemsCollection.findOne(query, projection)
.then(result => {
if(result) {
console.log(`Successfully found document: ${result}.`);
} else {
console.log("No document matches the provided query.");
}
return result;
})
.catch(err => console.error(`Failed to find document: ${err}`));
Example 5: findone and update mongoose
Model.findOne({ name: 'Mr. Anderson' }).
then(doc => Model.updateOne({ _id: doc._id }, { name: 'Neo' })).
then(() => Model.findOne({ name: 'Neo' })).
then(doc => console.log(doc.name));
const doc = await Model.findOne({ name: 'Neo' });
console.log(doc.name);
Example 6: mongoose select
query.select('a b');
query.select(['a', 'b']);
query.select({ a: 1, b: 1 });
query.select('-c -d');
const schema = new Schema({
foo: { type: String, select: false },
bar: String
});
query.select('+foo');
query.select({ a: 1, b: 1 });
query.select({ c: 0, d: 0 });