When it comes to performing a join-like operation, both GraphQL and Mongoose can be utilized for achieving the desired outcome.
Before posing any inquiries, consider the following example related to Task/Activities (please note that this code is purely for illustrative purposes and has not been tested):
Task {
_id,
title,
description,
activities: [{ //Of Activity Type
_id,
title
}]
}
In Mongoose, you can fetch the activities associated with a task using the populate method, similar to this:
const task = await TaskModel.findbyId(taskId).populate('activities');
By employing GraphQL and Dataloader, a comparable result can be achieved as follows:
const DataLoader = require('dataloader');
const getActivitiesByTask = (taskId) => await ActivityModel.find({task: taskId});
const dataloaders = () => ({
activitiesByTask: new DataLoader(getActivitiesByTask),
});
// ...
// SET The dataloader in the context
// ...
//------------------------------------------
// In another file
const resolvers = {
Query: {
Task: (_, { id }) => await TaskModel.findbyId(id),
},
Task: {
activities: (task, _, context) => context.dataloaders.activitiesByTask.load(task._id),
},
};
I attempted to search for an article comparing the performance and resource utilization of these two methods but came up empty-handed.
If you have any insights to share on this topic, your input would be greatly appreciated. Thank you!