猫鼬-保存时更新参考文档

Question

If I have a Schema which has an Array of references to another Schema, is there a way I can update both Documents with one endpoint?

This is my Schema:

CompanySchema = new Schema({
  addresses: [{
    type: Schema.Types.ObjectId,
    ref: 'Address'
  }]
});

I want to send a Company with the full Address object to /companies/:id/edit . With this endpoint, I want to edit attributes on Company and Address at the same time.

In Rails you can use something like nested attributes to do one big UPDATE call, and it will update the Company and update or add the Address as well.

Any idea how would you do this in Mongoose ?

Answer 1

Cascade saves are not natively supported in Mongoose ( issue ).

But there are plugins (example: cascading-relations ) that implement this behavior on nested populate objects .

Take in mind that mongodb is not a fully transactional database , and the "big save" is achieved with various insert()/update() op calls and you (or the plugin) have to handle errors and rollback.

Example of cascade save:

company.save()
  .then(() => Promise.all(company.addresses.map(address => {
    /* update fkeys if needed */
    return address.save()
    }))
  .catch(err => console.error('something went wrong...', err))