Is there a way to store a document then get an updated value of it at a later date without needing to query and populate again?

const someDocument = await SomeModel.findOne({...}).populate(...);

// store a reference to it for use
const props = {
   document: someDocument,
   ...
}

// at a later time
await props.document.getLatest() <-- update and populate in place?

CodePudding user response：

As describe here, You can define your own custom document instance methods by add functions on the schema level.

example taken from mongoose doc:

 // define a schema
 const animalSchema = new Schema({ name: String, type: String });

 // assign a function to the "methods" object of our animalSchema
 animalSchema.methods.findSimilarTypes = function(cb) {
   return mongoose.model('Animal').find({ type: this.type }, cb);
 };
 
 const Animal = mongoose.model('Animal', animalSchema);
 const dog = new Animal({ type: 'dog' });

 dog.findSimilarTypes((err, dogs) => {
   console.log(dogs); // woof
 });

This is the only way I can think of doing what you want - add a function that populate.

another thing that might help: you can create a pre hook on 'find' and add populate in it