How Can I Implement Unique Keys in Entity Framework Code-First?

Using unique keys in EF Code First

In Entity Framework (EF) Code First, you may need to define unique keys for specific properties in your model. However, it is important to note that EF does not natively support unique keys in Code First.

Solution: Custom database initializer

To define a unique key after creating the model, you can use a custom database initializer. This allows you to execute SQL commands during database initialization. Here’s how to do it:

1. Create a custom database initializer class that inherits from CreateDatabaseIfNotExists<您的上下文>:

<code>public class MyInitializer : CreateDatabaseIfNotExists<MyContext>
{
  protected override void Seed(MyContext context)
  {</code>

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