C#•2y ago•

2 replies

EF Core Defined in Library Assembly, Configured in ASPNET Asembly

Hey, I've been away from netcore for a while and im getting back into it. I have two assemblies right now:
* Journey.Web
* Journey.Application

I haven't decided to seperate much yet, just keeping the entrypoint seperate from the core logic. Thus most behavior is in the

Journey.Application

Journey.Application

assembly.

I've started to set up some EF Core, I've created an

ApplicationDbContext

ApplicationDbContext

Journey.Application

Journey.Application

and started building configurations for my entities using the

IEntityTypeConfiguration<T>

IEntityTypeConfiguration<T>

pattern with the following in my Application Context:

public class ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : DbContext(options), IAccountsContext
{
    public DbSet<Account> Accounts { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.ApplyConfigurationsFromAssembly(typeof(ApplicationDbContext).Assembly);
    }
}

public class ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : DbContext(options), IAccountsContext
{
    public DbSet<Account> Accounts { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.ApplyConfigurationsFromAssembly(typeof(ApplicationDbContext).Assembly);
    }
}

This is my configuration for

Account

Account

    public void Configure(EntityTypeBuilder<Account> a)
    {
        a.ToTable("accounts", "accounts");
        a.HasKey(x => x.Id);
        a.Property(x => x.Id)
            .HasConversion(i => i.Id, id => new AccountId(id))
            .HasValueGenerator(idGeneratorFactory.Create);
        a.Property(x => x.Email)
            .HasConversion(e => e.Value, e => new Email(e));
        a.Property(x => x.Name)
            .HasConversion(n => n.Value, n => new AccountName(n));
    }

    public void Configure(EntityTypeBuilder<Account> a)
    {
        a.ToTable("accounts", "accounts");
        a.HasKey(x => x.Id);
        a.Property(x => x.Id)
            .HasConversion(i => i.Id, id => new AccountId(id))
            .HasValueGenerator(idGeneratorFactory.Create);
        a.Property(x => x.Email)
            .HasConversion(e => e.Value, e => new Email(e));
        a.Property(x => x.Name)
            .HasConversion(n => n.Value, n => new AccountName(n));
    }

Note that I have configured

Account

Account

has a key

x.Id

x.Id

and The context should be picking up this configuration via the assembly binding in

OnModelCreating

OnModelCreating

.

However, when I run the following command from my solution:

dotnet ef migrations add AccountsSchemaAndTable --project Journey.Application --startup-project Journey.Web --context ApplicationDbContext

dotnet ef migrations add AccountsSchemaAndTable --project Journey.Application --startup-project Journey.Web --context ApplicationDbContext

I get the following error:

Unable to create a 'DbContext' of type 'ApplicationDbContext'. The exception 'The entity type 'Account' requires a primary key to be defined. If you intended to use a keyless entity type, call 'HasNoKey' in 'OnModelCreating'. For more information on keyless entity types, see https://go.microsoft.com/fwlink/?linkid=2141943.' was thrown while attempting to create an instance. For the different patterns supported at design time, see https://go.microsoft.com/fwlink/?linkid=851728

Unable to create a 'DbContext' of type 'ApplicationDbContext'. The exception 'The entity type 'Account' requires a primary key to be defined. If you intended to use a keyless entity type, call 'HasNoKey' in 'OnModelCreating'. For more information on keyless entity types, see https://go.microsoft.com/fwlink/?linkid=2141943.' was thrown while attempting to create an instance. For the different patterns supported at design time, see https://go.microsoft.com/fwlink/?linkid=851728

It does not seem like it's picking up the

EntityTypeConfiguration

EntityTypeConfiguration

since it doesn't seem to pick up the

.HasKey

.HasKey

definition. I also tried putting an exception in the Type Configuration method and it did not fail with my exception, so im relatively certain it's not executing my model binders, does anyone know what I've done wrong here?

EF Core Defined in Library Assembly, Configured in ASPNET Asembly

Journey.Application

Journey.Application

assembly.

I've started to set up some EF Core, I've created an

ApplicationDbContext

ApplicationDbContext

Journey.Application

Journey.Application

and started building configurations for my entities using the

IEntityTypeConfiguration<T>

IEntityTypeConfiguration<T>

pattern with the following in my Application Context:

public class ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : DbContext(options), IAccountsContext
{
    public DbSet<Account> Accounts { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.ApplyConfigurationsFromAssembly(typeof(ApplicationDbContext).Assembly);
    }
}

public class ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : DbContext(options), IAccountsContext
{
    public DbSet<Account> Accounts { get; set; }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.ApplyConfigurationsFromAssembly(typeof(ApplicationDbContext).Assembly);
    }
}

This is my configuration for

Account

Account

    public void Configure(EntityTypeBuilder<Account> a)
    {
        a.ToTable("accounts", "accounts");
        a.HasKey(x => x.Id);
        a.Property(x => x.Id)
            .HasConversion(i => i.Id, id => new AccountId(id))
            .HasValueGenerator(idGeneratorFactory.Create);
        a.Property(x => x.Email)
            .HasConversion(e => e.Value, e => new Email(e));
        a.Property(x => x.Name)
            .HasConversion(n => n.Value, n => new AccountName(n));
    }

    public void Configure(EntityTypeBuilder<Account> a)
    {
        a.ToTable("accounts", "accounts");
        a.HasKey(x => x.Id);
        a.Property(x => x.Id)
            .HasConversion(i => i.Id, id => new AccountId(id))
            .HasValueGenerator(idGeneratorFactory.Create);
        a.Property(x => x.Email)
            .HasConversion(e => e.Value, e => new Email(e));
        a.Property(x => x.Name)
            .HasConversion(n => n.Value, n => new AccountName(n));
    }

Note that I have configured

Account

Account

has a key

x.Id

x.Id

and The context should be picking up this configuration via the assembly binding in

OnModelCreating

OnModelCreating

.

However, when I run the following command from my solution:

dotnet ef migrations add AccountsSchemaAndTable --project Journey.Application --startup-project Journey.Web --context ApplicationDbContext

dotnet ef migrations add AccountsSchemaAndTable --project Journey.Application --startup-project Journey.Web --context ApplicationDbContext

I get the following error:

Unable to create a 'DbContext' of type 'ApplicationDbContext'. The exception 'The entity type 'Account' requires a primary key to be defined. If you intended to use a keyless entity type, call 'HasNoKey' in 'OnModelCreating'. For more information on keyless entity types, see https://go.microsoft.com/fwlink/?linkid=2141943.' was thrown while attempting to create an instance. For the different patterns supported at design time, see https://go.microsoft.com/fwlink/?linkid=851728

Unable to create a 'DbContext' of type 'ApplicationDbContext'. The exception 'The entity type 'Account' requires a primary key to be defined. If you intended to use a keyless entity type, call 'HasNoKey' in 'OnModelCreating'. For more information on keyless entity types, see https://go.microsoft.com/fwlink/?linkid=2141943.' was thrown while attempting to create an instance. For the different patterns supported at design time, see https://go.microsoft.com/fwlink/?linkid=851728

It does not seem like it's picking up the

EntityTypeConfiguration

EntityTypeConfiguration

since it doesn't seem to pick up the

.HasKey

.HasKey

EF Core Defined in Library Assembly, Configured in ASPNET Asembly

EF Core Defined in Library Assembly, Configured in ASPNET Asembly

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