实体框架数据库优先 - 如何防止运行初始迁移？

Question

I was able to scaffold an existing database using EF Core recently. We want to completely migrate to EF Core, but we've hit some snags and I need your help.

We began by running the scaffold command and ended up with this file structure

C:\>ls .\EFCore
Context
Models
EFCore.csproj

Then after creatinng the Context and the Models, I ran the inital migration command.

dotnet ef migrations add CreateDb

After running that command our directories look like this

C:\>ls .\EFCore
Context
Models
Migrations
EFCore.csproj

C:\>ls .\EFCore\Migrations
20210616210256_CreateDb.cs
20210616210256_CreateDb.Designer.cs
DbContextModelSnapshot.cs

My Problem

The database is already created in all environments, so we don't want entity to execute the inital database migration. Should I delete 20210616210256_CreateDb.cs and 20210616210256_CreateDb.Designer.cs to achieve this?

The other route I can think of is create the __EFMigrationsHistory table and insert a row into it. This would fake that we've already ran the inital db create.

Help please, I would like to do this the cleanest way possible.

Answer 1

Remove/Comment the code inside your Up() and Down() methods of migration file and call update database. You don't want the code which creates table ie

CreateTable(
            "dbo.YourTable",
            c => new
                { //Properties set here })

Your migration class could look like this -

public partial class Initial : DbMigration
{
    public override void Up()
    {   
    }
    
    public override void Down()
    {
    }
}