How to set the generator (from firebird) to an Entity framework 6 model field?

With a Firebird database, a table was created with the following fields:

/* Table: CLIENTE, Owner: SYSDBA */

CREATE TABLE "CLIENTE" 
(
  "ID"   INTEGER NOT NULL,
  "NOME"     VARCHAR(50) CHARACTER SET WIN1251 NOT NULL,
  CONSTRAINT "PK_CLIENTE" PRIMARY KEY ("ID")
);    

and for auto-increment of field ID a Generator :

/* Triggers only will work for SQL triggers */
SET TERM ^ ;
CREATE TRIGGER "SET_CUST_NO" FOR "CLIENTE" 
ACTIVE BEFORE INSERT POSITION 0
AS
BEGIN
    if (new.ID is null) then
    new.ID = gen_id(cust_no_gen, 1);
END
 ^    
COMMIT WORK ^
SET TERM ;^

In this way, every register ID will be incremented.

How to configure EntityFramework to work with mapping:

Download the packages:

• EntityFramework 6.1.3
• Firebird Entity Framework Provider 5.1.0
• Firebird ADO.NET Data Provider 5.1.0

Classes:

1) Template:

public class Cliente
{
    public int Id { get; set; }
    public string Nome { get; set; }
}

2) Mapping:

public sealed class ClienteConfiguration: EntityTypeConfiguration<Cliente>
{
    public ClienteConfiguration()
    {
        ToTable("CLIENTE");

        HasKey(c => c.Id)
            .Property(c => c.Id)
            .HasColumnName("ID")
            .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity);

        Property(c => c.Nome)
            .HasColumnName("NOME")
            .HasMaxLength(50);
    }
}

3) Context

public sealed class Database: DbContext
{
    public Database()
        :base("FireBirdConnectionString")
    {
    }
    public DbSet<Cliente> Cliente { get; set; }
    protected override void OnModelCreating(DbModelBuilder modelBuilder)
    {
        modelBuilder.Configurations.Add(new ClienteConfiguration());            
    }
}

4) Connection setup:

<connectionStrings>
    <add name="FireBirdConnectionString"
    connectionString="DataSource=localhost; User=SYSDBA;Password=masterkey; Database=C:\Temp\TUTORIAL.FDB;" 
    providerName="FirebirdSql.Data.FirebirdClient" />
</connectionStrings>

Your question:

It has been placed .HasDatabaseGeneratedOption(DatabaseGeneratedOption.Identity) , and it worked, it was removed this configuration, it also worked, that is , the provider is in charge of executing the insert with Generator , without configuration.

So, if your table is configured with Generator provider : Firebird Entity Framework Provider does the action and returns you in classe ID generated.