How to enable migration in EntityFramework Core Sqlite - xamarin.forms

Question

I have Dbset and creating database like this. When first time db is created then after I add column in dbset, then the migration does not work the table column is not found. Please help me how I can enable EF Core Sqlite migrations in Xamarin Forms.
public BaseSQLRespository(string databasePath)
{
try
{
_databasePath = databasePath;
Database.EnsureCreated();
// bool IsDatabaseCreated= ;
// Settings.IsDatabaseCreatedSettings = IsDatabaseCreated;
}
catch (Exception ex)
{
throw ex;
}
}
protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
{
try
{
optionsBuilder.UseSqlite(string.Format("Filename={0}", _databasePath));
}
catch (Exception ex)
{
throw ex;
}
}

Answer 1

Assuming you created a migration for your new column using the add-migration command, you can enable the execution of migrations at runtime by calling the Migrate() method instead of EnsureCreated(). The docs for the method can be found here.
As per Microsoft's documentation, the Migrate method is incompatible with the EnsureCreated method which actually bypasses the migrations when creating the database schema - so in your case you will have to delete the old database (uninstall the app or clear it's data) before trying the new code.
Don't call EnsureCreated() before Migrate(). EnsureCreated() bypasses Migrations to create the schema, which causes Migrate() to fail.
Source: EF Core - Apply migrations at runtime

Answer 2

To add an initial migration, run the following command:
dotnet ef migrations add YourNameOfMigration
Next, apply the migration to the database to create the schema:
dotnet ef database update
Migrations
Every time when you add a new field to the model you should add migration and apply it to DB.

Answer 3

i guess your configuration is wrong, you shouldn't call Database.EnsureCreated(); in ctor because OnConfiguring() is not called yet and your database is not initialized.
you can create a method which called once your serviceProvider is started.
public static void Initialize(IServiceProvider serviceProvider)
{
var context = serviceProvider.GetRequiredService<BaseSQLRespository>();//use your service provider any thing which you can get your current created `BaseSQLRespository`
context.Database.EnsureCreated();//once call when your app is started. (it is up to you which method you used to call)
...
...
}
In Addition, here is similar topic and different solution,
you can check: Error in Database.EnsureCreated() while using Entity Framework with Sqlite in Xamarin