Entity Framework Core 2.0 - Run migrations step by step

和自甴很熟 提交于 2019-11-27 04:47:07

问题


In EF6 I could retrieve migrations and run it step by step.
Is there a way to do something similar in EF Core?

EF 6 Code

public static void RunMigration(this DbContext context, DbMigration migration, string providerName, string manifest)
{
    var prop = migration.GetType().GetProperty("Operations", BindingFlags.NonPublic | BindingFlags.Instance);
    if (prop != null)
    {
        IEnumerable<MigrationOperation> operations = prop.GetValue(migration) as IEnumerable<MigrationOperation>;
        MigrationSqlGenerator generator = (new DbMigrationsConfiguration()).GetSqlGenerator(providerName);
        var statements = generator.Generate(operations, manifest);
        foreach (MigrationStatement item in statements)
            context.Database.ExecuteSqlCommand(item.Sql);
    }
}

回答1:


You can use the GetMigrations extension method of the DatabaseFacade class (returned by Database property of the DbContext) to get the list of the pending migration names.

Then you can obtain IMigrator service and use Migrate method passing each target migration name:

using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Infrastructure;
using Microsoft.EntityFrameworkCore.Migrations;

DbContext db = ...;
var pendingMigrations = db.Database.GetPendingMigrations().ToList();
if (pendingMigrations.Any())
{
    var migrator = db.Database.GetService<IMigrator>();
    foreach (var targetMigration in pendingMigrations)
        migrator.Migrate(targetMigration);
}


来源:https://stackoverflow.com/questions/45780598/entity-framework-core-2-0-run-migrations-step-by-step

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