assigning proberty to variable of type UpdateQuery returns error read-only

[GamelSadek]

Do you want to request a feature or report a bug?
bug
What is the current behavior?
declaring a variable with type UpdateQuery if you assign a value to this variable it returns the error "Cannot assign to ' ' because it is a read-only property"
If the current behavior is a bug, please provide the steps to reproduce.

import mongoose, { Schema, model,  UpdateQuery } from 'mongoose';
async function run() {
    mongoose.connect('mongodb://localhost:27017/test');
    interface User {
        phone?: string; 
        name?: string
    }
    const UserModel = model<User>('User', new Schema<User>({
        phone: String,
        name: String
    }));
    const updateQuery : UpdateQuery<User> = {name :'John'};
    if (1==1) {
        updateQuery.phone = 'XXXX'
    }
    const user = await UserModel.updateOne({},updateQuery)
}

{
  "compilerOptions": {
    "target": "ES6",                      
    "module": "commonjs",                     
    "strict": true,                          
    "esModuleInterop": true,                 
    "forceConsistentCasingInFileNames": true 
  }
}

What is the expected behavior?
it should not return an error

What are the versions of Node.js, Mongoose and MongoDB you are using? Note that "latest" is not a version.
Node.js: 14.17.4 , Mongoose: 6.0.7 , MongoDB: 4.4.3

[jdegger]

@vkarpov15 This bug still exists for when your query is using a $set:

const alarmUpdate: UpdateQuery<Alarm> = {
  $set: {
    severity: alarm.severity,
  },
};

if(true){ 

  alarmUpdate.$set.severity = dto.severity;
  
}

Gives readonly error.

[vkarpov15]

@jdegger please open a new issue and follow the issue template, you're missing a lot of key information, including mongoose version, typescript version, typescript config, etc.

Below script compiles without error on Mongoose 7.2.2, TypeScript 4.9.4.

import { UpdateQuery } from 'mongoose';

interface Alarm {
  severity: string;
}

const alarmUpdate: UpdateQuery<Alarm> = {
  $set: {
    severity: 'foo',
  },
};

if(true){ 

  alarmUpdate.$set!.severity = 'bar';
  
}