A) Override the IdentityUserAppService UpdateAsync (best if you only need to affect this specific endpoint)
using System.Threading.Tasks;
using Volo.Abp.Application.Services;
using Volo.Abp.DependencyInjection;
using Volo.Abp.Identity;
using Volo.Abp.Users;
[Dependency(ReplaceServices = true)]
public class MyIdentityUserAppService : IdentityUserAppService
{
public MyIdentityUserAppService(
IdentityUserManager userManager,
IIdentityUserRepository userRepository,
IIdentityRoleRepository roleRepository)
: base(userManager, userRepository, roleRepository)
{
}
public override async Task<IdentityUserDto> UpdateAsync(Guid id, IdentityUserUpdateDto input)
{
// Load current (old) values
var oldUser = await UserRepository.GetAsync(id);
var oldSurname = oldUser.Surname;
var oldEmail = oldUser.Email;
// Call the default update pipeline
var result = await base.UpdateAsync(id, input);
// Compare with new values
var newSurname = result.Surname;
var newEmail = result.Email;
if (!string.Equals(oldSurname, newSurname, StringComparison.Ordinal))
{
// Your logic when surname changed
// e.g., publish a distributed event, call an external service, etc.
}
if (!string.Equals(oldEmail, newEmail, StringComparison.OrdinalIgnoreCase))
{
// Your logic when email changed
}
return result;
}
}
B) Override/extend IdentityUserManager (when you want to enforce logic at the domain level)
C) Use extension to the admin UI and profile UI (if you need UI-driven logic) – not required for backend comparison but helpful when you also need to surface or control fields. For DTO extra properties to flow correctly through built-in services (like profile), ensure module extension mappings are applied to the related DTOs:
public class MyModule : AbpModule
{
private static readonly OneTimeRunner OneTimeRunner = new OneTimeRunner();
public override void PostConfigureServices(ServiceConfigurationContext context)
{
OneTimeRunner.Run(() =>
{
ModuleExtensionConfigurationHelper.ApplyEntityConfigurationToApi(
IdentityModuleExtensionConsts.ModuleName,
IdentityModuleExtensionConsts.EntityNames.User,
getApiTypes: new[] { typeof(IdentityUserDto), typeof(ProfileDto) },
createApiTypes: new[] { typeof(IdentityUserCreateDto) },
updateApiTypes: new[] { typeof(IdentityUserUpdateDto), typeof(UpdateProfileDto) }
);
});
}
}
Notes about “events get called a lot” and comparing old/new data:
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Apply the checklist below and republish:
[DependsOn(
typeof(AbpAspNetCoreMvcModule)
// + other dependencies...
)]
public class LmsWebModule : AbpModule
{
public override void ConfigureServices(ServiceConfigurationContext context)
{
// Allow ABP to find embedded Razor pages of this module
Configure<AbpVirtualFileSystemOptions>(options =>
{
options.FileSets.AddEmbedded<LmsWebModule>();
});
context.Services
.AddRazorPages()
.AddApplicationPart(typeof(LmsWebModule).Assembly);
}
public override void OnApplicationInitialization(ApplicationInitializationContext context)
{
var app = context.GetApplicationBuilder();
var env = context.GetEnvironment();
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
// IMPORTANT for ABP virtual/embedded files (including Razor pages/views)
app.UseAbp(); // ensures UseAbpVirtualFiles inside the pipeline
app.UseConfiguredEndpoints(); // maps Razor Pages
}
}
services.AddControllersWithViews()
.AddApplicationPart(typeof(LmsWebModule).Assembly)
.AddControllersAsServices();
services.AddRazorPages()
.AddApplicationPart(typeof(LmsWebModule).Assembly);
<ItemGroup>
<ProjectReference Include="..\..\modules\Lms\src\Lms.Web\Lms.Web.csproj" />
<!-- repeat for other modules that have Razor Pages -->
</ItemGroup>
If you pack modules as NuGet packages, ensure the package is referenced by the host and contains the compiled Razor views (RCL).
<ItemGroup>
<Content Include="wwwroot\**\*">
<CopyToPublishDirectory>Always</CopyToPublishDirectory>
</Content>
</ItemGroup>
<modules>
<remove name="WebDAVModule" />
</modules>
<handlers>
<remove name="WebDAV" />
</handlers>
<PropertyGroup>
<ErrorOnDuplicatePublishOutputFiles>false</ErrorOnDuplicatePublishOutputFiles>
</PropertyGroup>
in the host web project as a workaround.
app.UseCorrelationId();
app.UseStaticFiles();
app.UseRouting();
app.UseAuthentication();
app.UseAuthorization();
app.UseAbp(); // registers ABP middleware incl. virtual files and localization, etc.
app.UseConfiguredEndpoints(); // ABP maps controllers and Razor Pages
If these steps are applied, the same module Razor Pages that work locally will be discovered and served on IIS.
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Fix it by granting the required permissions to the user/role, or by removing the permission requirements from menu items if you want them always visible.
Step-by-step (recommended)
Optional checks
context.Menu.AddItem(
new ApplicationMenuItem(
"CmsKit.Settings",
L["Menu:CmsSettings"],
url: "/CmsKit/Settings",
icon: "fa fa-cog",
requiredPermissionName: CmsKitPermissions.SettingManagement
)
);
If requiredPermissionName is set, the user must have that permission.
await _permissionManager.SetForRoleAsync("admin", CmsKitPermissions.SettingManagement, true);
await _permissionManager.SetForRoleAsync("admin", CmsKitPermissions.PageFeedback.SettingManagement, true);
await _permissionManager.SetForRoleAsync("admin", "Forms.Form", true);
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Root cause
How to get consistent results (server and Angular)
Configure<PermissionOptions>(options =>
{
// Insert at the beginning to ensure it’s checked first
options.ValueProviders.Insert(0, typeof(MyCustomPermissionValueProvider));
// If you previously used Add(), it appends to the end — change it to Insert(0, ...)
});
// Pseudocode inside your configuration builder
foreach (var permission in permissionDefinitionManager.GetPermissions())
{
var granted = await permissionChecker.IsGrantedAsync(permission.Name);
if (granted)
{
dto.Auth.GrantedPolicies[permission.Name] = true;
}
}
- If you haven’t overridden anything, fixing provider order (step 1) is typically sufficient.
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What exit code -42 means in ABP Studio
Likely causes from your log and setup
Fix checklist (perform on every affected machine)
Notes for Blazor WASM + Public Website profile
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public class AccountQueryAppService : ApplicationService
{
private readonly IReadOnlyRepository<Account, Guid> _accountRepo;
public AccountQueryAppService(IReadOnlyRepository<Account, Guid> accountRepo)
{
_accountRepo = accountRepo;
}
[UnitOfWork(IsTransactional = false)]
public virtual async Task<AccountSummaryDto> GetSummaryAsync(Guid id)
{
var query = await _accountRepo.GetQueryableAsync();
var dto = await query.Where(x => x.Id == id)
.Select(x => new AccountSummaryDto { Id = x.Id, Balance = x.Balance })
.FirstOrDefaultAsync();
return dto;
}
}
[ConnectionStringName("ReadOnly")]
public class ReadOnlyDbContext : AbpDbContext<ReadOnlyDbContext>
{
public DbSet<Account> Accounts { get; set; }
public ReadOnlyDbContext(DbContextOptions<ReadOnlyDbContext> options) : base(options) { }
protected override void OnConfiguring(DbContextOptionsBuilder builder)
{
base.OnConfiguring(builder);
builder.UseQueryTrackingBehavior(QueryTrackingBehavior.NoTracking);
}
}
public class ReadOnlyAccountRepository : IReadOnlyRepository<Account, Guid>
{
private readonly ReadOnlyDbContext _dbContext;
public ReadOnlyAccountRepository(ReadOnlyDbContext dbContext) { _dbContext = dbContext; }
public async Task<IQueryable<Account>> GetQueryableAsync()
=> await Task.FromResult(_dbContext.Set<Account>().AsNoTracking());
}
Commands continue to use the default write DbContext/connection. This isolates read traffic to replicas and protects OLTP writes.
Reporting architecture
public class PrepareDailyLedgerJobArgs { public DateOnly Date { get; set; } }
public class PrepareDailyLedgerJob : AsyncBackgroundJob<PrepareDailyLedgerJobArgs>
{
private readonly IReportProjectionService _projection;
public PrepareDailyLedgerJob(IReportProjectionService projection) { _projection = projection; }
public override async Task ExecuteAsync(PrepareDailyLedgerJobArgs args)
{
await _projection.BuildDailyLedgerAsync(args.Date); // read from OLTP, write into reporting store
}
}
Use the Event Bus to publish domain events on transaction commit; a subscriber projects them into a reporting model (append-only or summarized aggregates). This keeps OLTP queries simple and reporting isolated.
Data stores: keep OLTP in SQL Server; create a separate reporting database (same SQL Server or separate instance). Point reporting UI to the reporting DB or read-only context.
Caching strategy (financial data)
public class CurrencyRatesCacheItem
{
public DateTime AsOf { get; set; }
public Dictionary<string, decimal> Rates { get; set; } = new();
}
public class CurrencyRateAppService : ApplicationService
{
private readonly IDistributedCache<CurrencyRatesCacheItem> _cache;
public CurrencyRateAppService(IDistributedCache<CurrencyRatesCacheItem> cache) { _cache = cache; }
[UnitOfWork(IsTransactional = false)]
public virtual async Task<CurrencyRatesCacheItem> GetRatesAsync()
{
return await _cache.GetOrAddAsync(
"CurrencyRates:Current",
async () => await LoadRatesAsync(),
() => new DistributedCacheEntryOptions { AbsoluteExpirationRelativeToNow = TimeSpan.FromMinutes(5) }
);
}
}
public class TransactionAppService : ApplicationService
{
private readonly IDistributedCache<AccountSummaryDto> _cache;
private readonly IRepository<Transaction, Guid> _txRepo;
private readonly IUnitOfWorkManager _uowManager;
public async Task PostAsync(CreateTransactionDto input)
{
await _txRepo.InsertAsync(Map(input));
await CurrentUnitOfWork.SaveChangesAsync();
_uowManager.Current.OnCompleted(async () =>
{
await _cache.RemoveAsync($"AccountSummary:{input.AccountId}");
});
}
}
Avoid caching mutable balances unless you can tolerate staleness for a short TTL; otherwise, cache reference data and computed report snapshots.
Database optimization
Additional ABP recommendations that help at scale
Configuration checklist for your monolith
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[DependsOn(
typeof(AbpHttpClientIdentityModelModule), // needed if you authenticate with OpenID Connect/IdentityModel
typeof(YourAppHttpApiClientModule) // from the Tiered app
)]
public class YourSingleWebModule : AbpModule
{
public override void ConfigureServices(ServiceConfigurationContext context)
{
// Remote service base URL
Configure<AbpRemoteServiceOptions>(options =>
{
options.RemoteServices.Default = new RemoteServiceConfiguration("https://your-tiered-api-root");
});
}
}
{
"RemoteServices": {
"Default": {
"BaseUrl": "https://your-tiered-api-root"
}
}
}
- If your HttpApi.Client module uses a custom remote service name, configure that key instead of Default. The key must match the remote service name used during proxy registration.
public class MyPageModel : PageModel
{
private readonly IBookAppService _bookAppService;
public MyPageModel(IBookAppService bookAppService)
{
_bookAppService = bookAppService;
}
public async Task OnGetAsync()
{
var result = await _bookAppService.GetListAsync();
// use result.Items...
}
}
{
"IdentityClients": {
"Default": {
"Authority": "https://your-auth-server",
"GrantType": "password",
"ClientId": "YourClientId",
"ClientSecret": "YourClientSecret",
"UserName": "admin",
"UserPassword": "1q2w3E*",
"Scope": "openid profile email roles YourApp"
}
}
}
Client Credentials (service-to-service):
{
"IdentityClients": {
"Default": {
"Authority": "https://your-auth-server",
"GrantType": "client_credentials",
"ClientId": "YourMachineClient",
"ClientSecret": "YourClientSecret",
"Scope": "YourApp"
}
}
}
3) With AbpHttpClientIdentityModelModule added, ABP automatically obtains tokens and sends authorized requests for all configured client proxies.
using Microsoft.AspNetCore.Authentication;
using Microsoft.AspNetCore.Http;
using Volo.Abp.DependencyInjection;
using Volo.Abp.Http.Client.Authentication;
[Dependency(ReplaceServices = true)]
[ExposeServices(typeof(IRemoteServiceHttpClientAuthenticator))]
public class CurrentUserRemoteServiceAuthenticator :
IRemoteServiceHttpClientAuthenticator, ITransientDependency
{
private readonly IHttpContextAccessor _httpContextAccessor;
public CurrentUserRemoteServiceAuthenticator(IHttpContextAccessor httpContextAccessor)
{
_httpContextAccessor = httpContextAccessor;
}
public async Task Authenticate(RemoteServiceHttpClientAuthenticateContext context)
{
var httpContext = _httpContextAccessor.HttpContext;
if (httpContext == null) return;
var accessToken = await httpContext.GetTokenAsync("access_token");
if (!string.IsNullOrWhiteSpace(accessToken))
{
context.Request.Headers.Authorization =
new System.Net.Http.Headers.AuthenticationHeaderValue("Bearer", accessToken);
}
}
}
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The error NETSDK1004: project.assets.json not found indicates NuGet packages were not restored before ABP Studio tried to run EF Core’s Add-Migration during Database synchronization. Also, the path shows .NET SDK 10.0.100 (preview/next gen) which is not yet supported by ABP Studio templates. Do the following once, then retry Database synchronization from ABP Studio.
A) Ensure supported .NET SDKs are installed and selected
B) Restore and build the solution before database sync
C) Verify EF Core tools work against the DbContext project
D) Run ABP Studio from the solution root
E) If the task still fails in Studio
Notes
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Root cause
What you can do
Preferred: Switch to an implementation that supports per-job queues
Or, keep MySQL but disable ABP’s Hangfire background workers and use a different background worker implementation in ABP
Example module setup:
[DependsOn(
typeof(AbpBackgroundWorkersQuartzModule), // run ABP workers via Quartz
typeof(AbpBackgroundJobsModule) // keep generic jobs; add Hangfire only if you need it
// typeof(AbpBackgroundJobsHangfireModule) // include only if you will use Hangfire for IBackgroundJobManager
)]
public class MyProjectDomainModule : AbpModule
{
public override void PreConfigureServices(ServiceConfigurationContext context)
{
// Configure Quartz persistence (e.g., MySQL/PostgreSQL/SQL Server)
PreConfigure<AbpQuartzOptions>(options =>
{
options.Configurator = cfg =>
{
cfg.UsePersistentStore(store =>
{
store.UseProperties = true;
store.UseJsonSerializer();
store.UseMySql("Your MySQL connection string"); // or other provider
});
};
});
}
}
- In your web host, remove AddHangfireServer if you don’t need Hangfire workers at all, or keep it only for background jobs that don’t specify per-job queue options in a way MySQL storage rejects.
- ABP’s internal workers (Identity session cleanup, token cleanup, audit log cleanup, etc.) will run under Quartz and won’t call Hangfire. That sidesteps the Hangfire/MySQL queue limitation.
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