scaffold-read

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name: scaffold-read description: Adds a new read operation (query) to the Backend with Marten queries, Projections, Caching, and Pagination. Use this when implementing GET endpoints or query features.

Follow this guide to implement a read-only endpoint in the Backend (ApiService) using strict project standards.

1. Define the DTO

   • Create a record in src/Shared/BookStore.Shared/Models/.
   • Properties: Guid Id, string Name, etc.
   • Localization (Text): Map localized text to a single string (e.g., string Description), NOT a Dictionary.
   • Data Maps: Use IReadOnlyDictionary<string, T> for non-text maps (e.g., Prices).

2. Define the Projection

   • Open/Create src/BookStore.ApiService/Projections/{Resource}Projection.cs.
   • Template: templates/Projection.cs
   • Localization Storage: Use Dictionary<string, string> for storing all translations (e.g., Descriptions, Biographies).
   • Reference: See marten-guide for projection patterns.

3. Expose the Endpoint

   • Open src/BookStore.ApiService/Endpoints/{Resource}Endpoints.cs.
   • Template: templates/Endpoint.cs

4. Implement Caching (HybridCache)

   • Wrap logic in cache.GetOrCreateLocalizedAsync (auto-appends culture to cache key).
   • Key: Include page, size, sort, order (culture added automatically).
   • Tags: Use CacheTags.{Resource}List or $\"{Resource.ToLower()}:{id}\".
   • Options: Set Expiration (L2/Redis) and LocalCacheExpiration (L1/memory).
   • Reference: See caching-guide for HybridCache patterns.

5. Implement Query (Marten)

   • Use await using var session = store.QuerySession();.
   • Query: session.Query<Projection>()
   • Filter: .Where(x => !x.Deleted)
   • Paginate: .ToPagedListAsync(page, pageSize, token)

6. Apply Localization

   • Map from Projection to DTO.
   • Text: Use LocalizationHelper.GetLocalizedValue(proj.Descriptions, culture, defaultCulture, "").
   • Maps: Copy directly (e.g., Prices = proj.Prices).

7. Client Integration

   • Interface: Create src/Client/BookStore.Client/IGet{Resource}Endpoint.cs manually.
   • Registration: Add to BookStoreClientExtensions.cs.

// turbo 8. Verify

• Run /verify-feature to ensure build and tests pass.

Related Skills

Prerequisites:

• /scaffold-write - Ensure write operations exist before adding reads
• /scaffold-projection - For detailed projection patterns and localization

Next Steps:

• /scaffold-frontend-feature - Create UI to consume the query
• /scaffold-test - Create integration tests for the endpoint
• /verify-feature - Complete verification

Debugging:

• /debug-cache - If caching issues occur

See Also:

• scaffold-projection - Advanced projection patterns
• scaffold-write - Related write operations
• caching-guide - HybridCache patterns
• localization-guide - Localization patterns
• ApiService AGENTS.md - Caching and localization patterns