Properly managing errors in Meteor when invoking a server-side method

Question

Properly managing errors in Meteor when invoking a server-side method

When it comes to removing a family from the server/publication methods, I invoke a method by calling deletedFamily like so:

    deletedFamily(family) {
      if (Meteor.user().roles[0] == "admin") {



         var myUsers = Meteor.users.find({"profile.family_id": family._id}).fetch();

         for (var i = 0; i < myUsers.length; i++) {
           UsersDeleted.insert(myUsers[i]);
           Meteor.users.remove(myUsers[i]);
          }

         var myGuests= Guests.find({"profile.family_id": family._id}).fetch();

         for (var i = 0; i < myGuests.length; i++) {
           GuestsDeleted.insert(myGuests[i]);
           Guests.remove(myGuests[i]);
          }

         FamiliesDeleted.insert(family);
         Families.remove(family);

      }
}

My aim is to handle exceptions and capture any errors that may occur. Although Meteor does not have built-in transactions, displaying the result of the process to the user in the front-end is essential.

javascript mongodb meteor

Answer 1

Answer №1

When working with Meteor, handling errors in methods is crucial for providing a smooth user experience. In Meteor, if you encounter an error within a method and want to notify the user, you can achieve this by throwing a specific type of exception called Meteor.Error.

On the client side, when calling a server-side Meteor method that may throw an error, it's important to define a callback function to properly handle any potential issues. If an error occurs during the method execution, the error argument in the callback will contain the relevant Meteor.Error object.

Let's take a look at an example to better understand how this works. Consider a meteor method that involves deleting a family record:

Meteor.methods({
  deleteFamily: function(family) {
    //... your logic here...

    if (somethingWentWrong) {
      throw new Meteor.Error("logged-out", "The user must be logged in to delete a family.");
    } else {
      return // something
    }
  },
});

When invoking this method on the client side, you can handle errors like this:

// Client-side code
Meteor.call("deleteFamily", function (error, result) {
  if (error && error.error === "logged-out") {
    Session.set("errorMessage", "Please log in to delete a family.");
  }

  // Proceed with further actions...
});

In cases where exceptions are thrown by external sources such as MongoDB operations, you can use try/catch blocks to capture these exceptions and encapsulate them into Meteor.Error objects for proper error handling. Here's an illustration:

Meteor.methods({
  deletedFamily: function(family) {
    //... your logic here...

    try {
      // Perform Mongodb insert or update
    } catch(e) {
      if (e instanceof WriteError && e.code === '11000') {
        throw new Meteor.Error("duplicate-error", "The family already exists.");
      }
    }
  },
});

Answer 2

When working with Meteor, handling errors in methods is crucial for providing a smooth user experience. In Meteor, if you encounter an error within a method and want to notify the user, you can achieve this by throwing a specific type of exception called Meteor.Error.

On the client side, when calling a server-side Meteor method that may throw an error, it's important to define a callback function to properly handle any potential issues. If an error occurs during the method execution, the error argument in the callback will contain the relevant Meteor.Error object.

Let's take a look at an example to better understand how this works. Consider a meteor method that involves deleting a family record:

Meteor.methods({
  deleteFamily: function(family) {
    //... your logic here...

    if (somethingWentWrong) {
      throw new Meteor.Error("logged-out", "The user must be logged in to delete a family.");
    } else {
      return // something
    }
  },
});

When invoking this method on the client side, you can handle errors like this:

// Client-side code
Meteor.call("deleteFamily", function (error, result) {
  if (error && error.error === "logged-out") {
    Session.set("errorMessage", "Please log in to delete a family.");
  }

  // Proceed with further actions...
});

In cases where exceptions are thrown by external sources such as MongoDB operations, you can use try/catch blocks to capture these exceptions and encapsulate them into Meteor.Error objects for proper error handling. Here's an illustration:

Meteor.methods({
  deletedFamily: function(family) {
    //... your logic here...

    try {
      // Perform Mongodb insert or update
    } catch(e) {
      if (e instanceof WriteError && e.code === '11000') {
        throw new Meteor.Error("duplicate-error", "The family already exists.");
      }
    }
  },
});

Answer 3

Answer №2

One way to handle errors is by using throw/catch method.

To understand more about this concept, refer to the provided link:

Throw

Answer 4

One way to handle errors is by using throw/catch method.

To understand more about this concept, refer to the provided link:

Throw

Properly managing errors in Meteor when invoking a server-side method

Answer №1

Answer №2

Similar questions

Removing substantial Javascript objects during memory shortage while operation is ongoing

Exploring the power of TypeScript within the useContext hook

What is the process for implementing async in a Google Cloud Function?

Creating an animated sidebar that moves at a different speed than the rest of the

Manipulating viewport settings to simulate smaller screens on a desktop device

Displaying a notification in React when the array of objects is empty

Troubleshooting unexpected behavior with Mongoose's findOne method when querying nested records

Leverage the power of an Express server to manage a Node.js application

Tips for Emphasizing a Row in a Table Using a Specific Value

Leveraging the power of Map and Sort to display the items containing image URLs alongside their respective timestamps

Discovering a particular string within a jQuery array object: Tips and tricks

Encountering an Internal Server error with Mongoose in Node.js

The input box fails to show larger values on the user's page

Utilizing Axios: Maintaining session continuity post successful authorization and including it in subsequent requests - testing in a browser-less environment

Running several copies of Mongo DB on a single server

Style the labels on the axis of Frappe Charts with colors (potentially utilizing the appropriate CSS selector)

How to access an ejs variable within a Node.js environment using Javascript

slider not functioning properly at the moment

Tips on fetching specific data from Firebase using Angular

What could be causing my variables to not update in Node.js?