Mongoose CRUD sample codes

crud.js

// Find one and remove entity afterwards
Charity.findOne({ cuid: userCuid });
.exec()
.then(entity => {
  if (!entity) res.status(404).end();
  else {
    entity.remove()
      .then(() => res.status(204).end());
  }
});
  
// Threading
Company.find(match).exec()
  .then(companies => Promise.all(companies.map(addOpportunityToCompany(activity, contactEmail)))
  .then(opportunities => ({...activity, opportunities});
    
// Update a document
Charity.findOne({ cuid: req.params.cuid })
  .exec()
  .then(entity => {
    Object.assign(req.body.charity, entity).save()
      .then(saved => res.status(200).json({ charity: saved });
  });
    
// Get documents with sorting
Charity.find(match)
  .sort('-dateAdded')
  .exec()
  .then(entities => res.json({ charities: entities });
  
// Get single document
Charity.findOne({ cuid: req.params.cuid })
  .exec()
  .then(entity => res.json({ charity: entity });
    
// If Charity expired add it to feed
Charity.findOne({ cuid: req.params.cuid })
  .exec()
  .then(activities => activities.forEach(activity => {
    const isExpired = moment().isAfter(activity.endDate);

    if(!isExpired) {
      emitFeed({
        charityCuid: charity.cuid,
        activityCuid: activity.cuid
      });
    }
  });
    
// Sorting 
Room.find({}).sort('-date').exec(function(err, docs) { ... });
Room.find({}).sort({date: -1}).exec(function(err, docs) { ... });
Room.find({}).sort({date: 'desc'}).exec(function(err, docs) { ... });
Room.find({}).sort({date: 'descending'}).exec(function(err, docs) { ... });
Room.find({}).sort([['date', -1]]).exec(function(err, docs) { ... });
Room.find({}, null, {sort: '-date'}, function(err, docs) { ... });
Room.find({}, null, {sort: {date: -1}}, function(err, docs) { ... });

// Sorting with multiple sort fields
Article.find({}).sort({fieldA: 1, fieldB: 1}).exec(function(err, docs){...})

service.js

export const emitFeed = (feed) => {
  const { charityCuid, activityCuid } = feed;
  return new Feed({ charityCuid, activityCuid }).save().catch();
}