Feathers-mongoose : Get by custom attribute in feathers-mongoose

Question

I have a very basic feathers service which stores data in mongoose using the feathers-mongoose package. The issue is with the get functionality. My model is as follows:

module.exports = function (app) {
  const mongooseClient = app.get('mongooseClient');
  const { Schema } = mongooseClient;
  const messages = new Schema({
    message: { type: String, required: true }
  }, {
    timestamps: true
  });

  return mongooseClient.model('messages', messages);
};

When the a user runs a GET command :

curl http://localhost:3030/messages/test

I have the following requirements

1. This essentially tries to convert test to ObjectID. What i would like it to do is to run a query against the message attribute {message : "test"} , i am not sure how i can achieve this. There is not enough documentation for to understand to write or change this in the hooks. Can some one please help
2. I want to return a custom error code (http) when a row is not found or does not match some of my criterias. How can i achive this?

Thanks

Answer 1

In a Feathers before hook you can set context.result in which case the original database call will be skipped. So the flow is

• In a before get hook, try to find the message by name
• If it exists set context.result to what was found
• Otherwise do nothing which will return the original get by id

This is how it looks:

async context => {
  const messages = context.service.find({
    ...context.params,
    query: {
      $limit: 1,
      name: context.id
    }
  });

  if (messages.total > 0) {
    context.result = messages.data[0];
  }

  return context;
}

How to create custom errors and set the error code is documented in the Errors API.