TypeError: Cannot read property '_update' of undefined

Do you want to request a feature or report a bug? BUG

What is the current behavior? TypeError: Cannot read property ‘_update’ of undefined

If the current behavior is a bug, please provide the steps to reproduce. Here’s a sample of code to reproduce the bug

const mongoose = require("mongoose");

const exampleSchema = new mongoose.Schema({
	name: { type: String },
	value: { type: Number },
}, {
	collection: "example",
	strict: "throw",
});
const ExampleModel = mongoose.model("Model", exampleSchema);
const example = new ExampleModel({ name: "example 1", value: 1 });

return mongoose
	.connect('mongodb://localhost:27017/test', {
		useNewUrlParser: true, useUnifiedTopology: true
	})
	.then(() => example.save())
	.then(() => ExampleModel.findOneAndUpdate({
			name: "example 1",
		} , {
			$set: { value: 2 },
		}, {
			runValidators: true,
		})
		.select("value")
	)
	.then((result) => console.log("test OK", result))
	.finally(() => mongoose.disconnect())
	.catch((error) => console.log("ERROR", error.stack));

What is the expected behavior? we expected the document to be updated

What are the versions of Node.js, Mongoose and MongoDB you are using? Note that “latest” is not a version.

• node : 10.16.0
• mongoose : 5.7.0
• mongoDb: 3.6.12

[baublet]

@kevin-wynn and I just spent all day debugging this. Apparently there an API breaking change in several hooks (in our case, in a pre hook) between 5.6 and 5.7. To fix this, lock your version numbers tightly. We we locked our to an older version:

"mongoose": "^5.2.18",

"mongoose": "5.2.x",

// OR

"mongoose": "5.2.18",

Or, if the above comments are correct about 5.6.13:

"mongoose": "5.6.13",

For reference (and for Google to help find this), here’s the stack trace we got from 5.7.0:

TypeError: Cannot read property '_update' of undefined
    at node_modules/mongoose/lib/query.js:3546:58
    at node_modules/mongoose/lib/utils.js:264:16
    at _done (node_modules/mongoose/lib/helpers/updateValidators.js:253:5)
    at node_modules/mongoose/lib/helpers/updateValidators.js:223:11
    at schemaPath.doValidate.updateValidator (node_modules/mongoose/lib/helpers/updateValidators.js:164:13)
    at node_modules/mongoose/lib/schematype.js:1029:11
    at node_modules/async-listener/glue.js:188:31
    at _combinedTickCallback (internal/process/next_tick.js:132:7)
    at process._tickDomainCallback [as _tickCallback] (internal/process/next_tick.js:219:9)

[sergebesson]

I confirm that version 5.7.1 fix the issue. thank you very much 😃