IT:AD:Code First:FluentAPI [Notes]

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# IT:AD:Code First:FluentAPI #



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Example:

    public class OurDbContext : DbContext {
    
      protected override void OnModelCreating(ModelBuilder modelBuilder)
      {
        modelBuilder.Entity<Department>().Property(dp => dp.Name).IsRequired();
        modelBuilder.Entity<Manager>().HasKey(ma => ma.ManagerCode);
        modelBuilder.Entity<Manager>().Property(ma => ma.Name)
            .IsConcurrencyToken(true)
            .IsVariableLength()
            .HasMaxLength(20);
      }
    }


You can break it up quite nicely as follows:

    public class DepartmentTypeConfiguration : EntityTypeConfiguration<Department>
    {
      public DepartmentTypeConfiguration()
      {
        Property(d => d.Name).
          IsRequired().
          HasMaxLength(50);
        ....
      }
}

WHich you can then add to your `DbContext`'s `OnModelBuilding` method as follows:


    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {

      //Add in...
      modelBuilder.Configurations.Add(new DepartmentTypeConfiguration());
      ...
      base.OnModelCreating(modelBuilder);
    }


## Reference ##

* [Ref:MSDN:Fluent API](http://bit.ly/tNQkHJ)
* [Ref:CP](http://www.codeproject.com/Articles/165720/Using-the-Code-First-Model-Configuration-Classes)