CODEWITHSUNDEEP
c#asp.net-coreentity-framework-coreentity-framework-migrations.net-8.0
M.Youssef
M.Youssef

Reputation: 148

EF Core exception when running add-migration statement with PublishAot flag set

I created a new Web API project (AOT), after I created the basic tables and the basic settings, I needed to create my first migration Add-Migration InitialCreate; but I get an exception:

Unable to create a 'DbContext' of type ''. The exception 'Model building is not supported when publishing with NativeAOT. Use a compiled model.' was thrown while attempting to create an instance for the different patterns supported at design time.

My ApplicationDbContext code:

public class ApplicationDbContext: DbContext
{
    public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options) : base(options)
    {
    } 

    public DbSet<Department>? Departments { get; set; }
    public DbSet<Unit>? Units { get; set; } 
}

My Program.cs is:

var builder = WebApplication.CreateSlimBuilder(args);
var ConnectionString = "Connection";
var connectionString = builder.Configuration.GetConnectionString(ConnectionString);

builder.Services.AddDbContext<ApplicationDbContext>(x =>
{
    x.UseSqlServer(connectionString);
});

// Add services to the container.
builder.Services.AddControllers()
    .AddNewtonsoftJson(options =>
    {
        options.SerializerSettings.ReferenceLoopHandling = Newtonsoft.Json.ReferenceLoopHandling.Ignore;
        options.SerializerSettings.ContractResolver = new DefaultContractResolver();
    });
builder.Services.AddEndpointsApiExplorer();
builder.Services.AddSwaggerGen();

var app = builder.Build();

// Configure the HTTP request pipeline.
if (app.Environment.IsDevelopment())
{
    app.UseSwagger();
    app.UseSwaggerUI();
}

app.UseHttpsRedirection();
app.UseCors("CorsPolicy");

builder.Services.ConfigureHttpJsonOptions(options =>
{
    options.SerializerOptions.TypeInfoResolverChain.Insert(0, AppJsonSerializerContext.Default);
});

app.UseAuthentication();
app.UseAuthorization();

app.MapControllers();
app.Run();

Provider and version information:

Upvotes: 0

Views: 2168

Answers (1)

Andriy Svyryd
Andriy Svyryd

Reputation: 2041

For EF 8.0 and 9.0 you need to set <PublishAot>false</PublishAot> while running any of the tools.

Upvotes: 0

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