JAVASCRIPT

mongosh findone

use database-name

db.users.findOne({ slug: 'username' })

findone mongoose

// Find one adventure whose `country` is 'Croatia', otherwise `null`
await Adventure.findOne({ country: 'Croatia' }).exec();

// using callback
Adventure.findOne({ country: 'Croatia' }, function (err, adventure) {});

// select only the adventures name and length
await Adventure.findOne({ country: 'Croatia' }, 'name length').exec();

mongoose find

const Tour = require('./../models/tourModel');
exports.getAllTours = async (req, res) => {
  try {
    const tours = await Tour.find();
    res.status(200).json({
      status: 'sucess',
      results: tours.length,
      data: {
        tours,
      },
    });
  } catch (error) {
    res.status(404).json({
      status: 'fail',
      message: error,
    });
  }
};

exports.getTour = async (req, res) => {
  try {
    const tour = await Tour.findById(req.params.id);
    // const tour = await Tour.findOne({ _id: req.params.id });
    res.status(200).json({
      status: 'success',
      data: {
        tour,
      },
    });
  } catch (error) {
    res.status(404).json({
      status: 'Error',
      message: error,
    });
  }
};

mongoose find

model_Name.find({query},function(err,rs){
if(err){
console.log(err);
}
else{
console.log(rs)
}
}


//EXAMPLE
Fruit.find({name:"apple"},function(err,rs){
if(err){
console.log(err);
}
else{
console.log(rs)
}
}

mongoose find

const query = Customer.find().sort({ name: 1 }).limit(1);
query.getOptions(); // { sort: { name: 1 }, limit: 1 }

findone mongoose

Model.findById(id, function (err, doc) {
  if (err) ..
  doc.name = 'jason bourne';
  doc.save(callback);
});

findone mongoose

A.findOneAndUpdate(conditions, update, options, callback) // executes
A.findOneAndUpdate(conditions, update, options)  // returns Query
A.findOneAndUpdate(conditions, update, callback) // executes
A.findOneAndUpdate(conditions, update)           // returns Query
A.findOneAndUpdate()                             // returns Query

findone mongoose

A.findOneAndDelete(conditions, options, callback) // executes
A.findOneAndDelete(conditions, options)  // return Query
A.findOneAndDelete(conditions, callback) // executes
A.findOneAndDelete(conditions) // returns Query
A.findOneAndDelete()           // returns Query

findone mongoose

A.findOneAndRemove(conditions, options, callback) // executes
A.findOneAndRemove(conditions, options)  // return Query
A.findOneAndRemove(conditions, callback) // executes
A.findOneAndRemove(conditions) // returns Query
A.findOneAndRemove()           // returns Query

findone mongoose

A.findOneAndReplace(conditions, options, callback) // executes
A.findOneAndReplace(conditions, options)  // return Query
A.findOneAndReplace(conditions, callback) // executes
A.findOneAndReplace(conditions) // returns Query
A.findOneAndReplace()           // returns Query