Add a new attribute to existing json object in node.js

Question

I have an object like this

==================records=========={ Id: 5114a3c21203e0d811000088,
  userId: \'test\',
  sUserId: test,
  userName: \'test\',
  ur         


        

Answer 1

I experienced a similar problem, and hope that my hours of existential frustration help others in the same situation. My inclination was to believe that documents returned via Mongoose are read-only. This is actually not true.

However, you cannot assign a property to your document that is not also in your Schema.

So, unless your schema has the following:

{
    Name: {String}
}

you will be constantly frustrated by trying to assign Name to your document.

Now, there are workarounds in the answers above that also worked for me, but they do not get to the root of the problem:

myDocument.toObject();
JSON.parse(JSON.stringify(myDocument);

These will work, but in my opinion they just hide the problem. The real issue is that Mongoose is smarter than we realized and is enforcing your schema, as it should.