A) Always run migrations + seed via DbMigrator first
B) Verify the connection string used by all processes
C) Ensure seeding is invoked if you rely on hosts (not only DbMigrator)
public override async Task OnApplicationInitializationAsync(ApplicationInitializationContext context)
{
var seeder = context.ServiceProvider.GetRequiredService<IDataSeeder>();
await seeder.SeedAsync(); // idempotent; safe to call
}
D) Confirm your IDataSeedContributor discovery
public class MyDataSeedContributor : IDataSeedContributor, ITransientDependency
{
public async Task SeedAsync(DataSeedContext context)
{
// idempotent seeding
}
}
E) Check OpenIddict client seeding inputs
F) Ensure migrations include all module tables
G) Swagger/Angular UI missing on API
app.UseAbpSwaggerUI(options =>
{
options.SwaggerEndpoint("/swagger/v1/swagger.json", "My API");
});
H) Make seeding resilient and repeatable
I) Quick local recovery steps
This approach aligns with common ABP conventions, but specific official documentation for every point in this exact scenario is not available.
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Apply the checklist below exactly in this order:
Trust and use HTTPS dev certificate
Ensure the HttpApiHost really runs and listens
Fix ports in Angular environment
Enable CORS for Angular origin
Use HTTPS in Angular OAuth config
Clear stale Angular dev state
Confirm application-configuration endpoint manually
Most common root causes for exactly this symptom:
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[DependsOn(/* ... */)]
public class QRSPCBaseSetServiceDomainSharedModule : AbpModule
{
public override void ConfigureServices(ServiceConfigurationContext context)
{
Configure<AbpLocalizationOptions>(options =>
{
options.Resources
.Add<BaseSetServiceResource>("en")
.AddBaseTypes(typeof(AbpValidationResource))
.AddVirtualJson("/Localization/BaseSetService"); // folder with zh-Hans.json etc.
});
}
}
3) The gateway routes /api/abp/application-localization to Administration and no cache inconsistency exists (see next).
4) If dynamic localization is enabled, ensure the Language Management DB contains the resource (initial registration occurs on first start of the resource-owning service). Restarting the service re-registers resources if needed.
Caching considerations for intermittent missing resources
Why the page returns to Home every ~45 minutes
Diagnostics checklist
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What you see is expected. When you create an ABP application with Angular UI, the CLI generates:
Those “layers” are the standard ABP solution structure for a modular, maintainable backend. The Angular app consumes the backend APIs from the HttpApi.Host. Even if you don’t touch each C# project directly, they are required for a functional backend and for features like permissions, auditing, data seeding, migrations, etc.
If you want only an Angular front-end without ABP backend projects:
Summary of recommended commands:
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This response was generated by AI. If it didn’t solve your problem, feel free to post a new answer — our support team will jump in to help you soon.
Do this:
Add Elsa v3 EF packages to the Host (the app that will expose Elsa endpoints):
Configure Elsa in the Host
using Elsa.EntityFrameworkCore;
using Elsa.EntityFrameworkCore.Extensions;
using Microsoft.EntityFrameworkCore;
[DependsOn(
typeof(Volo.Elsa.Abp.AspNetCore.AbpElsaAspNetCoreModule),
typeof(Volo.Elsa.Abp.Identity.AbpElsaIdentityModule),
typeof(Volo.Elsa.Abp.Application.AbpElsaApplicationModule),
typeof(Volo.Elsa.Abp.Application.Contracts.AbpElsaApplicationContractsModule)
)]
public class MyProjectHttpApiHostModule : AbpModule
{
public override void ConfigureServices(ServiceConfigurationContext context)
{
var configuration = context.Services.GetConfiguration();
var cs = configuration.GetConnectionString("Default");
context.Services
.AddElsa(elsa => elsa
.UseEntityFrameworkCorePersistence(ef => ef.UseSqlServer(cs))
.UseWorkflowManagement()
.UseWorkflowRuntime(runtime => runtime.UseEntityFrameworkCore(ef => ef.UseSqlServer(cs)))
.UseScheduling()
.UseJavaScript()
.UseHttp(http => configuration.GetSection("Elsa:Http").Bind(http))
.UseWorkflowsApi());
context.Services.AddElsaApiEndpoints();
Configure<AbpAntiForgeryOptions>(o =>
{
// Exclude Elsa API
o.AutoValidateFilter = t => t.Assembly != typeof(Elsa.Server.Api.Endpoints.WorkflowRegistry.Get).Assembly;
});
}
public override void OnApplicationInitialization(ApplicationInitializationContext context)
{
var app = context.GetApplicationBuilder();
app.UseHttpActivities();
app.UseConfiguredEndpoints();
}
}
using Elsa.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Design;
using Microsoft.Extensions.Configuration;
public class ElsaContextFactory : IDesignTimeDbContextFactory<ElsaContext>
{
public ElsaContext CreateDbContext(string[] args)
{
var cfg = new ConfigurationBuilder()
.AddJsonFile("appsettings.json", optional: true)
.AddJsonFile("appsettings.Development.json", optional: true)
.AddEnvironmentVariables()
.Build();
var options = new DbContextOptionsBuilder<ElsaContext>()
.UseSqlServer(cfg.GetConnectionString("Default"))
.Options;
return new ElsaContext(options);
}
}
Create migrations for Elsa’s DbContext (not your app DbContext):
Apply in ABP way (recommended):
Will the Host act as Elsa Server?
Production readiness status
Microservice note (if applicable)
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Do this in your host (the application that will expose Elsa endpoints):
Packages (NuGet)
Configure Elsa EF Core persistence In your Host module’s ConfigureServices:
using Elsa.EntityFrameworkCore.Extensions;
using Elsa.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;
public override void ConfigureServices(ServiceConfigurationContext context)
{
var configuration = context.Services.GetConfiguration();
context.Services
.AddElsa(elsa =>
{
elsa
.UseEntityFrameworkCorePersistence(ef =>
ef.UseSqlServer(configuration.GetConnectionString("Default")))
.AddHttpActivities()
.AddQuartzTemporalActivities();
});
context.Services.AddElsaApiEndpoints();
}
public override void OnApplicationInitialization(ApplicationInitializationContext context)
{
var app = context.GetApplicationBuilder();
app.UseHttpActivities();
app.UseConfiguredEndpoints();
}
using Elsa.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore;
using Microsoft.EntityFrameworkCore.Design;
using Microsoft.Extensions.Configuration;
public class ElsaContextFactory : IDesignTimeDbContextFactory<ElsaContext>
{
public ElsaContext CreateDbContext(string[] args)
{
var config = new ConfigurationBuilder()
.AddJsonFile("appsettings.json", optional: false)
.AddEnvironmentVariables()
.Build();
var options = new DbContextOptionsBuilder<ElsaContext>()
.UseSqlServer(config.GetConnectionString("Default"))
.Options;
return new ElsaContext(options);
}
}
Clean bin/obj and ensure the project builds before adding the migration.
Will your Host act as “Elsa Server”?
Production readiness
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Why you see “empty migration” with Elsa Pro:
How to add Elsa database schema:
Example (simplified):
// In your Host module
public override void ConfigureServices(ServiceConfigurationContext context)
{
var configuration = context.Services.GetConfiguration();
context.Services.AddElsa(elsa => elsa
.UseEntityFrameworkPersistence(ef => ef.UseSqlServer(configuration.GetConnectionString("Default")))
.AddHttpActivities()
.AddQuartzTemporalActivities()
);
context.Services.AddElsaApiEndpoints();
}
Commands (run from the Host project folder that references Elsa.Persistence.EntityFramework.*):
Notes:
If a migration still comes out empty, clean bin/obj, ensure the Host builds, and verify that UseEntityFrameworkPersistence is executed in design-time factory or the EF tools can discover ElsaContext.
Applying schema vs. seeding: use your solution’s DbMigrator (preferred) to ensure seeding runs; Package Manager Console Update-Database only applies schema.
Does your Host act as Elsa Server?
Production readiness status
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Ensure WebSockets are enabled on the host
Confirm SignalR traffic is not blocked by proxy/load balancer
Check that the blazor.server.js and static assets are being served
Verify the app is truly Blazor Server (not Blazor Web App misconfigured)
If hosted as a sub-application (virtual directory), set the base href
IIS-specific quick checklist
Azure App Service quick checklist
If you can’t click the Login button on your public site specifically:
Code snippets (only if you are behind a proxy/load balancer):
public override void OnApplicationInitialization(ApplicationInitializationContext context)
{
var app = context.GetApplicationBuilder();
// ...
app.UseForwardedHeaders(new ForwardedHeadersOptions
{
ForwardedHeaders = Microsoft.AspNetCore.HttpOverrides.ForwardedHeaders.XForwardedFor
| Microsoft.AspNetCore.HttpOverrides.ForwardedHeaders.XForwardedProto
| Microsoft.AspNetCore.HttpOverrides.ForwardedHeaders.XForwardedHost
});
// ...
app.UseConfiguredEndpoints();
}
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Please try these definitive checks/fixes:
A) Ensure real email sender is used in production
public override void ConfigureServices(ServiceConfigurationContext context)
{
#if DEBUG
context.Services.Replace(ServiceDescriptor.Singleton<IEmailSender, NullEmailSender>());
#endif
}
B) Prefer MailKit in production
C) Stop using File.ReadAllTextAsync for templates in production
Configure<AbpVirtualFileSystemOptions>(options =>
{
options.FileSets.AddEmbedded<YourProjectDomainModule>();
});
public static class MyEmailTemplates
{
public const string UserCreation = "MyEmailTemplates.UserCreation";
public const string ChangePassword = "MyEmailTemplates.ChangePassword";
}
public class EmailTemplateDefinitionProvider : TemplateDefinitionProvider
{
public override void Define(ITemplateDefinitionContext context)
{
context.Add(new TemplateDefinition(MyEmailTemplates.UserCreation)
.WithVirtualFilePath("/Emailing/Templates/UserCreation.tpl", isInlineLocalized: true));
context.Add(new TemplateDefinition(MyEmailTemplates.ChangePassword)
.WithVirtualFilePath("/Emailing/Templates/ChangePassword.tpl", isInlineLocalized: true));
}
}
private async Task<string> RenderEmailBodyAsync(string templateName, object model)
{
var key = templateName.Equals("UserCreation.tpl", StringComparison.OrdinalIgnoreCase)
? MyEmailTemplates.UserCreation
: MyEmailTemplates.ChangePassword;
return await _templateRenderer.RenderAsync(key, model);
}
D) If you want to keep manual replacements
private readonly IVirtualFileProvider _vfs;
public SendGridEmailNotificationAppServiceBase(..., IVirtualFileProvider vfs, ...)
{
_vfs = vfs;
}
private async Task<string> LoadTemplateFromVfsAsync(string virtualPath)
{
var fi = _vfs.GetFileInfo(virtualPath);
if (!fi.Exists) throw new FileNotFoundException($"Template not found: {virtualPath}");
using var s = fi.CreateReadStream();
using var r = new StreamReader(s);
return await r.ReadToEndAsync();
}
E) Verify environment URLs
F) Quick diagnostic to confirm mail path
await _emailSender.SendAsync("you@domain.com", "Test", "Hello", false);
If this arrives, the SMTP configuration is correct and the problem is template loading; move to using VFS/ITemplateRenderer as above.
If you still want to share logs, please look specifically for:
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