Feed and Detail

Goal

This snapshot advances Northline Press by teaching you to build a database-backed feed and post detail pages.

Every numbered folder is a complete app. Run this stage independently, then compare it with the previous folder.

Prerequisites

Use .NET 8 SDK, a terminal, and Docker for Postgres stages. You should recognize C#, HTTP verbs, and basic HTML.

Port 5080 must be free. Copy .env.example and review appsettings.json before database stages.

• .NET 8 SDK
• A code editor and terminal
• Docker from part 4 onward

Concepts

List and detail are separate reads: the feed shows summaries; detail loads one row by primary key.

Keep page models thin: Razor Pages accept input, services and EF Core enforce rules, and Razor escapes output by default.

Walkthrough

Link feed titles to /posts/{id} and return 404 when a post is missing.

Read the example, then open the matching snapshot. The repository includes the surrounding setup and error handling.

var post = await _db.Posts.FindAsync(id);
if (post is null) return NotFound();

Run and verify

Enter 05-Feed-And-Detail, restore packages, and run on port 5080.

Open http://127.0.0.1:5080. Watch the terminal for validation and database errors.

docker compose up -d
git clone https://github.com/michaeldunga1/fcc-aspnet-blog.git
cd fcc-aspnet-blog/05-Feed-And-Detail
cp .env.example .env
dotnet restore
dotnet run --urls http://127.0.0.1:5080

Troubleshooting

Passing a non-integer id should fail route binding before your handler runs.

Restore errors usually mean the SDK is missing or you opened the wrong folder. For Postgres failures, confirm Docker is running and the northline_NN database name matches the snapshot.

• Read the first error first
• Restart after environment changes
• Never commit .env or production secrets

Try this

Show the created timestamp on the detail page.

Test a happy path and one invalid or unauthorized request.

• Make one small change
• Test it in the browser
• Compare with the next snapshot only after it works