如何将Entity Framework映射代码迁移至Entity Worker Core？编译报错寻等效代码

Got it, let's work through this migration issue. The code you're trying to port is for configuring Table Per Hierarchy (TPH) inheritance in Entity Framework—where you map a subclass to a specific discriminator value. Entity Worker Core uses a dedicated Fluent API approach for this scenario, so here's the direct equivalent:

// Entity Worker Core equivalent code
modelBuilder.Entity<OriginalClass>()
    .SubEntity<OtherClass>(config => 
        config.Discriminator(discrim => discrim.Name("Field1").Value("Value1")));

Breakdown of the changes: #

• Instead of EF's Map<OtherClass>(), Entity Worker Core uses SubEntity<OtherClass>() to register a subclass for inheritance mapping.
• The Discriminator() method replaces EF's Requires().HasValue() chain:
  • Name("Field1") specifies the name of the discriminator column in your database table.
  • Value("Value1") sets the exact value that will identify rows belonging to OtherClass.

Additional Notes: #

• Make sure OtherClass inherits directly from OriginalClass (your base entity) in your codebase.
• If you're using Code First, Entity Worker Core will automatically handle creating the Field1 column in the table for OriginalClass if it doesn't already exist.
• For multiple subclasses, repeat the SubEntity<T> call for each one, specifying unique discriminator values for each.

内容的提问来源于stack exchange，提问作者Diana G