Not displaying error messages

Oct 13, 2025 by leolavanderia.com.br 52 views

Introduction

The fleet system is a crucial component of any space exploration or management game, allowing players to navigate through various celestial bodies and manage their resources. However, a bug has been discovered that causes an exception when changing the fleet destination while a parameter is empty. In this article, we will delve into the details of this bug, its reproduction steps, and the expected behavior.

Describe the Bug

When using the fleet system, if one of the input parameters is fully emptied, for example, the galaxy coordinates, and the user attempts to switch from one destination to another, such as from a planet to a moon, the system gets stuck in a loading state and causes an exception on the backend. This behavior is unexpected and can be frustrating for users who are trying to navigate through the fleet system.

To Reproduce

The steps to reproduce this behavior are as follows:

Step 1: Access the Fleet System

Navigate to the fleet system by accessing the /fleet page.

Step 2: Empty the First Co-ordinates Box

Empty the first co-ordinates box, which is typically used to input the galaxy coordinates.

Step 3: Click on a Different Destination

Click on a different destination, such as a moon or a planet.

Step 4: Observe the Loading and Network Error

Observe the loading animation and the network error message that appears on the screen.

Expected Behavior

The expected behavior when changing the fleet destination while a parameter is empty is that the system should work as intended and allow the user to switch destinations without posting the data. The system should handle the empty parameter and provide a smooth user experience.

Root Cause Analysis

The root cause of this bug is likely due to the way the fleet system handles empty parameters. When a parameter is empty, the system may attempt to post the data to the backend, which can cause an exception. This exception can then cause the system to get stuck in a loading state and display a network error message.

Solution

To fix this bug, the fleet system needs to be modified to handle empty parameters correctly. This can be achieved by adding a check to ensure that the parameter is not empty before attempting to post the data to the backend. If the parameter is empty, the system should display an error message to the user and prevent the user from switching destinations.

Implementation

The implementation of this solution can be achieved by modifying the fleet system's JavaScript code to include a check for empty parameters. Here is an example of how this can be done:

// Check if the galaxy coordinates are empty
if (galaxyCoordinates === '') {
  // Display an error message to the user
  alert('Please enter the galaxy coordinates');
  // Prevent the user from switching destinations
  return;
}

// Post the data to the backend
fetch('/fleet', {
  method: 'POST',
  body: JSON.stringify({
    galaxyCoordinates: galaxyCoordinates,
    destination: destination
  })
})
.then(response => response.json())
.then(data => {
  // Update the fleet system with the new data
  updateFleetSystem(data);
})
.catch(error => {
  // Display a network error message to the user
  alert('Network error: ' + error.message);
});

Conclusion

In conclusion, the bug of changing the fleet destination while a parameter is empty causes an exception is a critical issue that needs to be addressed. By understanding the root cause of the bug and implementing a solution to handle empty parameters correctly, we can provide a smooth user experience and prevent the system from getting stuck in a loading state. The implementation of this solution can be achieved by modifying the fleet system's JavaScript code to include a check for empty parameters.

Future Work

Future work on this bug can include:

Testing: Thorough testing of the fleet system to ensure that the bug is fixed and the system works as intended.
Refactoring: Refactoring of the fleet system's code to make it more maintainable and efficient.
Performance Optimization: Performance optimization of the fleet system to improve its speed and responsiveness.

References

[1] Fleet System Documentation
[2] JavaScript Fetch API Documentation
[3] HTML5 Alert API Documentation

Appendix

The following is a list of additional resources that may be helpful in understanding and fixing this bug:

[1] Fleet System GitHub Repository
[2] JavaScript Fetch API GitHub Repository
[3] HTML5 Alert API GitHub Repository
Q&A: Changing Fleet Destination While a Parameter is Empty Causes Exception ====================================================================

Introduction

In our previous article, we discussed the bug of changing the fleet destination while a parameter is empty causes an exception. In this article, we will provide a Q&A section to address some of the common questions and concerns related to this bug.

Q: What is the root cause of this bug?

A: The root cause of this bug is likely due to the way the fleet system handles empty parameters. When a parameter is empty, the system may attempt to post the data to the backend, which can cause an exception.

Q: How can I reproduce this bug?

A: To reproduce this bug, follow these steps:

Access the fleet system by navigating to the /fleet page.
Empty the first co-ordinates box, which is typically used to input the galaxy coordinates.
Click on a different destination, such as a moon or a planet.
Observe the loading animation and the network error message that appears on the screen.

Q: What is the expected behavior when changing the fleet destination while a parameter is empty?

A: The expected behavior is that the system should work as intended and allow the user to switch destinations without posting the data. The system should handle the empty parameter and provide a smooth user experience.

Q: How can I fix this bug?

A: To fix this bug, the fleet system needs to be modified to handle empty parameters correctly. This can be achieved by adding a check to ensure that the parameter is not empty before attempting to post the data to the backend. If the parameter is empty, the system should display an error message to the user and prevent the user from switching destinations.

Q: What is the solution to this bug?

A: The solution to this bug is to modify the fleet system's JavaScript code to include a check for empty parameters. Here is an example of how this can be done:

// Check if the galaxy coordinates are empty
if (galaxyCoordinates === '') {
  // Display an error message to the user
  alert('Please enter the galaxy coordinates');
  // Prevent the user from switching destinations
  return;
}

// Post the data to the backend
fetch('/fleet', {
  method: 'POST',
  body: JSON.stringify({
    galaxyCoordinates: galaxyCoordinates,
    destination: destination
  })
})
.then(response => response.json())
.then(data => {
  // Update the fleet system with the new data
  updateFleetSystem(data);
})
.catch(error => {
  // Display a network error message to the user
  alert('Network error: ' + error.message);
});

Q: What are some best practices for handling empty parameters in the fleet system?

A: Some best practices for handling empty parameters in the fleet system include:

Validate user input: Always validate user input to ensure that it is not empty or invalid.
Display error messages: Display error messages to the user when they attempt to switch destinations with an empty parameter.
Prevent user actions: Prevent the user from switching destinations when an empty parameter is detected.
Optimize performance: Optimize the performance of the fleet system to prevent it from getting stuck in a loading state.

Q: What are some common mistakes to avoid when handling empty parameters in the fleet system?

A: Some common mistakes to avoid when handling empty parameters in the fleet system include:

Not validating user input: Failing to validate user input can lead to exceptions and errors.
Not displaying error messages: Failing to display error messages can lead to confusion and frustration for the user.
Not preventing user actions: Failing to prevent user actions can lead to unexpected behavior and errors.
Not optimizing performance: Failing to optimize performance can lead to slow loading times and a poor user experience.