Storing a javascript error object in mongoose: Best practices

Suppose we have an error object declared as follows:

const error = new Error('Error');

I attempted to store this error object in a MongoDB field using the Object type, and even tried the Mixed type, but it ends up storing an empty Object. How can I resolve this issue?

const UserLogSchema = new Schema(
  {
    ...
    error: {
      type: Schema.Types.Mixed
    }
  },
  {
    timestamps: true
  }
);

const UserLog = mongoose.model('UserLog', UserLogSchema);

Adding the error into the database:

const userLog = await UserLog.findOne({ _id: userLogID });

userLog.error = new Error('Error');

await userLog.save();

Upon attempting to retrieve the error at a later stage:

const userLog = await UserLog.findOne({ _id: userLogID });

console.log(userLog.error)

The console output is {}, indicating an empty object. However, the original error is not empty.

Answer №1

Would it be effective to serialize the error object and save it as a JSON string?

error = new Error('oh no');
errorJson = JSON.stringify(error, Object.getOwnPropertyNames(error));
console.log(errorJson);
// output: {"stack":"Error: oh no\n    at <anonymous>:1:7","message":"oh no"}

For more information on this topic, you can check out a similar question here, or consider using the serialize-error package.

Answer №2

To store errors using mongoose, simply create a schema with two properties:

{
  errorDescription: {
    type: 'object',
    required: true
  },
  timestamp: {}
}

Whenever an error occurs, access this schema and save it to the database using

schemaName.save('errorObject', function(obj){})
. This method will ensure that your error information is securely stored.

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