EF 4.1 Code First - what is the equivalent of [NotMapped] in fluent API?

Question

I don't want to have depency on entity framework in my domain model and have mapping in a separate project:

 

this.Property(t => t.Id).HasColumnName("Id");
this.Property(t => t.CategoryId).HasColumnName("CategoryId");

and I would assume that all not explicitly mapped properties are not persisted. However, if I add a public property to my domain object, framework complains that corresponding column is missing in database. It appears that it is trying to do auto-mapping. This is very easy to fix with [NotMapped] data annotation attribute, but I don't want dependency on entity framework. I tried

this.Property(t => t.RetailPrice.Amount).HasDatabaseGeneratedOption(DatabaseGeneratedOption.None);

but it didn't work. Can this be done without data annotation attributes?

Thanks,

-Stan

 

Answer 1

Ignore method.

---

You Can't Stop Me!

Answer 2

Hi Stan,

Welcome!

Ignore a property:

modelBuilder.Entity<Person>() 
  .Ignore(p => p.Name); 

the more information you can refer here: http://blogs.msdn.com/b/adonet/archive/2010/12/06/ef-feature-ctp5-fluent-api-samples.aspx

Have a nice day.

---

Alan Chen[MSFT]
MSDN Community Support | Feedback to us
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Answer 3

This works great. Thank you and "buaatt" .There is only one wrinkle, though.

I have this code (generated by EF power tools, by the way):

protected override void OnModelCreating(DbModelBuilder modelBuilder)
 {
  modelBuilder.Conventions.Remove<IncludeMetadataConvention>();
  modelBuilder.Configurations.Add(new StockItemMap());
 }

Where map is like this:

public class StockItemMap : EntityTypeConfiguration<StockItem>
 {
 public StockItemMap()
 {
  // Primary Key
  this.HasKey(t => t.Id);  

  // Properties
  // Table & Column Mappings
  this.ToTable("StockItem");
  this.Property(t => t.Id).HasColumnName("Id");
////..

Ignore cannot be applied in the mapping class and I ended up puting in before:

 

protected override void OnModelCreating(DbModelBuilder modelBuilder)
 {
  modelBuilder.Conventions.Remove<IncludeMetadataConvention>();
  modelBuilder.Configurations.Add(new CategoryMap());  
  modelBuilder.Configurations.Add(new StockItemMap());

  modelBuilder.Entity<StockItem>().Ignore(s => s.RetailPrice);
 }

Which is I guess, something I am going to have to live with..

Answer 4

You can add it in the EntityTypeConfiguration<StockItem> Like this

public class StockItemMap : EntityTypeConfiguration<StockItem>
 {
 public StockItemMap()
 {
  // Primary Key
  this.HasKey(t => t.Id);  

  // Properties
  // Table & Column Mappings
  this.ToTable("StockItem");
  this.Property(t => t.Id).HasColumnName("Id");
  Ignore(s => s.RetailPrice);

////..