Best method to set Query and Lean defaults about mongoose HOT 4 CLOSED

For setting translateAliases application-wide, you should be able to just do mongoose.set('translateAliases', true). The following script shows that's enough to turn on translateAliases for all queries:

'use strict';

const mongoose = require('mongoose');

mongoose.set('translateAliases', true);

run().catch(error => {
  console.error(error);
  process.exit(-1);
});

async function run() {
  await mongoose.connect('mongodb://127.0.0.1:27017/mongoose_test');

  const schema = new mongoose.Schema({
    name: { type: String, alias: 'fullName' }
  });
  const Test = mongoose.model('Test', schema);

  await Test.deleteMany({});
  await Test.create({ name: 'foo' });
  console.log(await Test.findOne({ fullName: 'foo' })); // Finds the doc
  process.exit(0);
}

For setting defaults on lean queries, try the mongoose-lean-defaults plugin, that's our officially supported plugin for applying defaults on lean documents. Another approach you can try is Model.applyDefaults() in a post hook, Model.applyDefaults() is a one-liner for applying a model's defaults to a given POJO.

from mongoose.

Thank you so much for the response. I will use mongoose.set('translateAliases', true); as suggested to apply that globally.

However, I still have some questions about how to apply the appropriate lean options to each and every lean query. I am already using the defaults plugin to set default values for properties when a lean query is involved. I think I am asking something different.

In this case, I am asking if there is a good way to set options for each and every lean query; for example:

MY OPTIONS

const LEAN_OPTS = Object.freeze({
  autopopulate: true,
  defaults: true,
  getters: true,
  virtuals: true,
  versionKey: false,
});

IN MY pre hook

    this._mongooseOptions = {
      ...this.mongooseOptions(),
      ...(this.mongooseOptions()?.lean && {
        lean: {
          ...LEAN_OPTS,
          ...this.mongooseOptions().lean,
        },
      }),
    };

Hope that makes more sense. I probably didn't describe it well. My apologies.

from mongoose.

I'd recommend doing something more like the following:

if (this.mongooseOptions()?.lean) {
  this.setOptions({
    lean: { ...LEAN_OPTS, this.mongooseOptions().lean }
  });
}

But otherwise you're right, currently the only good way to set default lean options is via plugin, and your approach works

from mongoose.

Thank you so much. I will give that a shot and see how that goes. Hopefully, that will cascade to the populate queries too. 👍

from mongoose.