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To resolve the error "Could not find the BLOB Storage provider with the type (Volo.Abp.BlobStoring.Database.DatabaseBlobProvider...)", you must ensure that:

1. The Database BLOB provider NuGet package is installed in your project:

dotnet add package Volo.Abp.BlobStoring.Database

2. The module dependency is declared in your module class (e.g., in your *.HttpApi.Host or main module):

[DependsOn(typeof(AbpBlobStoringDatabaseModule))]
   public class YourModule : AbpModule
   {
       // ...
   }

3. The provider is configured in ConfigureServices:

Configure<AbpBlobStoringOptions>(options =>
   {
       options.Containers.ConfigureDefault(container =>
       {
           container.UseDatabase();
       });
       // Your other container configurations...
   });

4. If you are using the File Management or Account module (which uses AccountProfilePictureContainer), ensure the default provider is set or that you configure the specific container:

options.Containers.Configure<AccountProfilePictureContainer>(container =>
   {
       container.UseDatabase();
   });

5. If you have multiple providers (e.g., Minio and Database), you must configure each container explicitly to use the correct provider. The default provider is only used for containers that are not explicitly configured.

6. Restart your application after making these changes.

This will register the Database BLOB provider and resolve the exception.

Sources:

• ABP Blob Storing: Database Provider
• ABP Blob Storing System
• ABP Support: BLOB Storage provider dependency

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The slow performance of ABP permission cache (PermissionGrants) during the first login is a known behavior, especially when there are a large number of permissions or roles. The method PermissionStore.SetCacheItemsAsync is responsible for loading and caching all granted permissions for the first time, which can be time-consuming if the dataset is large. Subsequent logins are fast because the data is served from the cache.

Key points and recommendations:

• The first load after a cache clear (or on a cold start) will query all permission grants from the database and set them in the cache, which can take several seconds if you have thousands of permissions or roles.
• After the initial load, subsequent requests are fast due to caching.
• To improve the first-load performance:
  • Reduce the number of permission grants if possible.
  • Optimize your database (indexes, hardware, etc.).
  • Consider pre-warming the cache after deployment or application restart.
  • If using distributed cache (e.g., Redis), ensure the cache server is performant and network latency is low.

For more details and discussion, see the official support thread:

• https://abp.io/support/questions/9767/The-abp-permission-cache-PermissionGrants-loads-very-slowly-during-the-first-login-but-very-quickly-during-the-second-login-When-the-permission-cache-is-manually-cleared-it-slows-down-again

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To configure multiple ABP MVC applications to use a single AuthServer for authentication and authorization in a tiered setup, follow these steps:

1. Ensure each client application's appsettings.json (both Web and HttpApi.Host) has the correct AuthServer section pointing to your AuthServer's URL:

"AuthServer": {
     "Authority": "https://your-auth-server-url",
     "RequireHttpsMetadata": "true",
     "ClientId": "YourClientAppName",
     "ClientSecret": "YourClientSecret"
   }

2. In your AuthServer, register each client application in the OpenIddict Applications table. Each client should have:

   • A unique ClientId (matching the ClientId in the client appsettings).
   • The correct redirect URIs for MVC (e.g., https://your-client-app/signin-oidc).
   • The required permissions and scopes.

3. In each client application's Startup or module configuration, ensure authentication is set up to use OpenId Connect and points to the AuthServer.

4. Make sure the client applications reference the AuthServer's authority and use the correct scopes (e.g., openid, profile, email, and any custom API scopes).

5. If permissions are not being loaded, ensure:

   • The client app references the Application.Contracts of the modules that define permissions.
   • The permission providers are registered in the client app's module.
   • The AuthServer is running and accessible from the client apps.

6. For troubleshooting:

   • Check network connectivity between client apps and AuthServer.
   • Review logs for authentication/authorization errors.
   • Ensure clock synchronization between servers.

For a full example and step-by-step guide, see the official ABP documentation on tiered application setup:

Sources

• ABP Tiered Application Template Guide

This approach aligns with common ABP conventions for centralized authentication and authorization in a tiered architecture.

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• In ABP 9.3.x, the LeptonX theme and style injection mechanism for Angular was updated, and the order of style injection may no longer match the order in angular.json. This can affect your ability to override LeptonX theme variables/styles with your own styles.

• To ensure your custom styles are loaded after the LeptonX theme, you should inject your override styles dynamically at runtime, or use higher CSS specificity or !important as a workaround. The current ABP LeptonX style loader does not provide a built-in configuration to guarantee your styles are injected last via angular.json order.

• You do not need to provide your own LPX_PRO_STYLE_TOKEN, LPX_LAYOUT_STYLE_FINAL, or LPX_STYLE_FINAL unless you want to fully customize the style loading process. The current loader does not expose a public API for reordering, but you can create a custom provider to control style injection order if necessary.

• The ABP team is aware of the limitation, as indicated by the //TODO comment in the code. However, there is no official fix or configuration for this in 9.3.x. You can follow the official LeptonX theme documentation and community article for best practices and updates:

  • To override LeptonX theme variables, add your custom CSS to styles.scss and use CSS variables as shown below:

:root {
      --lpx-logo: url('/assets/images/logo.png');
      --lpx-logo-icon: url('/assets/images/logo-icon.png');
      --lpx-brand: #edae53;
    }

• If you need to guarantee order, inject your custom style sheet dynamically after the app starts, or use a workaround like importing your CSS at the end of the main style file.

• This is a known area for improvement, and you can track updates or provide feedback via the official channels.

Sources:

• LeptonX Theme for ABP Framework (Angular)
• ABP Angular Styles Documentation

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• In ABP, when you throw a UserFriendlyException on the backend, the message should be sent to the client as-is. If your Angular client is showing a generic "Internal error" message instead, this usually means the exception is not being recognized as a user-friendly error, or the error handling pipeline is not configured correctly.

To ensure UserFriendlyException messages are shown on the Angular client:

1. Throw UserFriendlyException in the backend:

throw new UserFriendlyException("Your custom message here");

Or, for localization:

throw new UserFriendlyException(L["YourLocalizedKey"]);

2. Check Exception Localization Configuration: Make sure you have configured AbpExceptionLocalizationOptions if you are using localization for exception messages.

Configure<AbpExceptionLocalizationOptions>(options =>
   {
       options.MapCodeNamespace("YourProjectNamespace", typeof(YourResource));
   });

3. Angular Error Handling: ABP Angular UI uses a global HTTP interceptor and error handler to display user-friendly messages. If you have customized or replaced the default error handling, ensure you are not swallowing or replacing the error message.

   • The error message from UserFriendlyException should be available in the HTTP error response as error.error.message.
   • The ABP Angular template uses a toast or snackbar to show this message.

4. Check for Microservice Gateway Issues: If you are using a gateway (like Ocelot or YARP), ensure it is not modifying or hiding the error response from the backend.

5. Sample: Backend:

throw new UserFriendlyException("This is a user-friendly error!");

Angular (in your service or component):

this.yourService.callApi().subscribe({
     next: () => { /* success */ },
     error: (err) => {
       // err.error.message should contain your UserFriendlyException message
       this.toastService.showError(err.error.message);
     }
   });

6. If you are using the default ABP Angular error handling, and still see "Internal error", check if:
   • The backend is returning a proper ABP error response (with error.message).
   • The Angular app is not running in production mode with error suppression.
   • There is no proxy/gateway stripping the error details.

If you follow these steps and the problem persists, verify that your backend and frontend are both using compatible ABP versions and that no custom middleware or error handler is interfering with the error response.

Sources:

• ABP Exception Handling Documentation
• ABP Support: UserFriendlyException not shown
• ABP Support: Localization and UserFriendlyException

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To use LeptonX components (like <lpx-navbar>, <lpx-footer>, etc.) in a custom layout with the new ABP Studio standalone API-based configuration (app.config.ts), you must ensure that the LeptonX modules are properly registered in the providers array, since standalone configuration does not use NgModules in the traditional way.

Here's how you can resolve the issue:

1. Instead of importing LeptonX modules in app.config.ts as you would in app.module.ts, you need to add them to the providers array using the provide* functions exported by those modules.

2. For LeptonX, use the provideLpxSideMenuLayout() and provideLpxResponsive() (if needed) functions.

Example for app.config.ts:

import { ApplicationConfig } from '@angular/core';
import { provideLpxSideMenuLayout } from '@volosoft/ngx-lepton-x/layouts';
import { provideLpxResponsive } from '@volosoft/ngx-lepton-x.core'; // optional

export const appConfig: ApplicationConfig = {
  providers: [
    // ...other providers
    provideLpxSideMenuLayout(),
    provideLpxResponsive(), // only if you use lpxResponsive directive
  ]
};

3. Remove any direct module imports (like LpxSideMenuLayoutModule) from app.config.ts, as they are not compatible with standalone API-based configuration.

4. Ensure your custom layout component is declared as a standalone component and imports the necessary LeptonX components in its imports array.

Example:

import { Component } from '@angular/core';
import { LpxNavbarComponent, LpxFooterComponent } from '@volosoft/ngx-lepton-x/components';

@Component({
  selector: 'app-custom-layout',
  standalone: true,
  imports: [LpxNavbarComponent, LpxFooterComponent /*, ...other LeptonX components*/],
  templateUrl: './custom-layout.component.html',
})
export class CustomLayoutComponent {}

5. Use the LeptonX components in your template as before:

<lpx-navbar></lpx-navbar>
<!-- ... -->
<lpx-footer></lpx-footer>

By registering the LeptonX providers and importing the components in your standalone component, the LeptonX elements will render correctly in the UI.

Sources:

• https://abp.io/docs/latest/framework/ui/angular/component-replacement?_redirected=B8ABF606AA1BDF5C629883DF1061649A#how-to-replace-a-layout
• https://github.com/abpio/abp-commercial-docs/blob/dev/en/themes/lepton-x/how-to-use-lepton-x-components-with-angular-custom-layout.md

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To address the issue of handling email confirmation and user ID retrieval in your ABP Angular application:

1. The ABP Angular package does not provide a built-in frontend route for the "ConfirmUser" page (e.g., /Account/ConfirmUser) or a direct API endpoint like /api/account/send-email-confirmation-token out of the box. This is why you do not see a redirect or a node for this in your Angular app.

2. When the login error indicates that the user must confirm their email, the backend should ideally return the userId in the error response. However, as you observed, this is not always the case, especially if the backend is not customized to include it.

3. To resolve this:

   • Ensure your backend (AccountController or custom login endpoint) includes the userId in the error response when login fails due to unconfirmed email. This may require customizing the backend logic to add userId to the error payload.
   • On the frontend, extract the userId from the error response as you attempted. If it is not present, you cannot proceed with sending the confirmation token without it.

4. To implement the email confirmation flow in Angular:

   • Add a custom page/component for email confirmation (e.g., /account/confirm-user).
   • When the login error indicates email confirmation is required, redirect the user to this page, passing the userId (if available).
   • On this page, call your backend endpoint (e.g., /api/account/send-email-confirmation-token) with the userId to send the confirmation email.

5. If you want to configure the Angular app to handle the confirmation page and API:

   • Add a route in your Angular routing module for the confirm-user page.
   • Implement the logic to call the backend API and handle the confirmation process.

Example backend customization (C#):

// In your AccountController
if (!user.EmailConfirmed)
{
    return Unauthorized(new
    {
        error_description = "You are not allowed to login! Your account is inactive or needs to confirm your email/phone number.",
        userId = user.Id
    });
}

Example Angular error handling:

case "You are not allowed to login! Your account is inactive or needs to confirm your email/phone number.":
  const userId = err.error?.userId;
  if (userId) {
    this.router.navigate(['/account/confirm-user'], { queryParams: { userId } });
  }
  break;

If the userId is not returned, you must update your backend to include it.

Sources:

• https://abp.io/support/questions/7608
• https://docs.abp.io/en/abp/latest/Modules/Account
• https://docs.abp.io/en/abp/latest/Emailing

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• After upgrading to ABP 9.3.x and Angular 20.x, you must follow the official migration guides to resolve breaking changes, especially for Angular DI and ABP UI packages.
• The error you are seeing (NG0203: inject() function must be called from an injection context) is a known Angular 16+ breaking change, and ABP 9.3.x has adapted to Angular 20, but you must ensure all your ABP, VOLO, and Angular packages are on compatible versions and that your code and imports follow the new requirements.

Required steps:

1. Make sure all @abp/, @volo/, and @angular/* packages are on the exact same major/minor version (e.g., 9.3.2 for ABP/VOLO, 20.2.1 for Angular).
2. Update your Node.js to at least v20.19.0 (required by Angular 20).
3. Clean your workspace:
   • Delete node_modules and package-lock.json/yarn.lock.
   • Run a fresh install: npm install or yarn install.
4. Review and update your code according to the migration guides:
   • Some deprecated APIs (like DOCUMENT token) are no longer globally available; update your imports as needed.
   • If you have custom providers, services, or use inject() outside of constructors/factories, refactor them to comply with Angular 16+ DI rules.

Migration guides:

• ABP 9.3 Migration Guide (Angular 20):
  https://abp.io/docs/latest/release-info/migration-guides/abp-9-3
• Angular UI v3 Migration Guide (for reference on module structure and best practices):
  https://abp.io/docs/latest/framework/ui/angular/migration-guide-v3

These guides provide step-by-step instructions and highlight breaking changes you must address.

Summary:

• Ensure all dependencies are aligned and up-to-date.
• Refactor any custom code that uses inject() outside of supported contexts.
• Follow the official migration guides for both ABP and Angular.

Sources:

• https://abp.io/docs/latest/release-info/migration-guides/abp-9-3
• https://abp.io/docs/latest/framework/ui/angular/migration-guide-v3

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To provide correct ABP.Route configuration for Angular routes with placeholders (such as :exampleId), you should define the path in your ABP.Route entries using the same placeholder syntax as in your Angular route definitions. This ensures that the menu, breadcrumbs, and icons are correctly resolved for dynamic routes.

Here's how you can adjust your configuration:

1. Use Placeholder Syntax in ABP.Route Paths
   The path property in your ABP.Route should match the Angular route, including placeholders. For example:

{
     path: `/${path}/:exampleId/${EXAMPLE_ROUTE_NAMES.a}`,
     name: '::Menu:Examples:A',
     parentName: '::Menu:Examples',
     order: 2,
   },
   {
     path: `/${path}/:exampleId/${EXAMPLE_ROUTE_NAMES.b}`,
     name: '::Menu:Examples:B',
     parentName: '::Menu:Examples',
     order: 3,
   },

This is correct and supported by the ABP Angular menu system.

2. Ensure Consistency
   Make sure the path in your ABP.Route matches exactly the route definition in your Angular router, including the placeholder (e.g., :exampleId). This allows the ABP menu and breadcrumb system to resolve the correct menu item even for dynamic routes.

3. Parent-Child Relationships
   Use the parentName property to establish the hierarchy for breadcrumbs and menu nesting.

4. No Need for undefined Path
   Avoid using path: undefined for dynamic routes. Always specify the full path with placeholders.

5. Example
   Here’s a minimal example for a dynamic route:

{
     path: '/examples/:exampleId/subroute-a',
     name: '::Menu:Examples:A',
     parentName: '::Menu:Examples',
     order: 2,
   }

6. Menu and Breadcrumbs
   With this setup, when you navigate to /examples/123/subroute-a, the ABP menu and breadcrumb system will correctly highlight and display the menu item for "A" under "Examples".

Summary:
Define your ABP.Route path with the same placeholder syntax as your Angular route (e.g., :exampleId). This enables the ABP Angular UI to resolve menu and breadcrumb items for dynamic routes.

Sources:

• ABP Angular: Modifying the Menu

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When you see the error "Error occurred on DB migration step! Make sure the project is compiled and working. Command output: Build started... Build failed. Use dotnet build to see the errors." in ABP Suite, it means the code generation step failed because your solution did not build successfully.

To resolve this:

1. Open a terminal in the root folder of your solution.
2. Run the following command to see the actual build errors:

dotnet build

3. Review the error messages shown in the terminal. Fix any code, dependency, or configuration issues reported.
4. Once the build succeeds, return to ABP Suite and try generating the entity again.

This is a common step in the ABP Suite workflow: the Suite relies on a successful build to generate migrations and backend code. Any compilation error in your solution (including missing references, syntax errors, or misconfigurations) will cause this step to fail.

For more details on entity generation and troubleshooting, see:

• https://docs.abp.io/en/abp/latest/Suite/generating-crud-page

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