DEV Community

Amir Hossein Shekari
Amir Hossein Shekari

Posted on

How I Saved My Production Database with One Simple Console Message

As a .NET developer, I had a close call when I applied a migration to my production database without changing the database connection string. I was mortified when I realized my mistake, but I quickly got to work finding a solution to prevent it from happening again.

That's when I came up with the idea to add a console message that displays the migration details before applying it. This simple addition gives me the chance to review the migration details and ensure that I am working with the correct database before making any changes.

With this new safeguard in place, I can breathe easy knowing that my production database is safe from accidental alterations. It just goes to show that sometimes the simplest solutions can be the most effective.

public class ApplicationDbContextFactory : IDesignTimeDbContextFactory<ApplicationDbContext>
    public ApplicationDbContext CreateDbContext(string[] args)
        // ... Some code to generate dbContextBuilder
        var context = new ApplicationDbContext(dbContextBuilder.Options);

        // This is where magic happends
        var pendingMigrations = context.Database.GetPendingMigrations();

        Console.WriteLine("This command is going to apply migrations with following details");

        Console.Write("ConnectionString: ");
        Console.ForegroundColor = ConsoleColor.Yellow;

        Console.ForegroundColor = ConsoleColor.Yellow;
        Console.WriteLine(string.Join("\n\t", value: pendingMigrations.ToArray()));

        Console.WriteLine("Do You confirm? (Y/N)");
        var userInput = (Console.ReadLine());

        if (userInput is "Y" or "y")
            return context;

        Console.ForegroundColor = ConsoleColor.Red;
        return null;

Enter fullscreen mode Exit fullscreen mode

Top comments (2)

kalkwst profile image
Kostas Kalafatis

Hey there! Nice post. Just wanted to add that you can use Octopus Deploy with your .NET application. You can easily handle different connection strings for different environments through the Variables feature. This allows you to set the connection strings and other variables once, so you can sleep easy at night knowing that everything is configured correctly.

Also, if you want to handle console dialogs in your application, you can use Spectre.Console. It's a great library that allows you to create beautiful and interactive console applications with ease. Hope that helps!

vanenshi profile image
Amir Hossein Shekari

Thanks @kalkwst
I’ll definitely take a look at both of them