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name: sql-schema description: Database Architect skill. Use this when you need to modify the database schema, add tables, or seed data. This project uses RAW SQL SCRIPTS orchestrated by .NET Aspire, NOT Entity Framework Migrations.

SQL Schema Management Skill

Overview

MoreSpeakers.com uses a "Script-Load" pattern via .NET Aspire (MoreSpeakers.AppHost) to initialize the SQL Server container. We DO NOT use dotnet ef migrations.

Source of Truth

The database schema is defined in scripts/database/.

Workflow

1. Identify the Change

Determine if you need a new table, a modified column, or new seed data.

2. Locate the Loading Logic

Check src/MoreSpeakers.AppHost/AppHost.cs. Look for the sqlText concatenation logic:

var sqlText = string.Concat(
    File.ReadAllText(Path.Combine(path, @"../../scripts/database/create-database.sql")),
    " ",
    File.ReadAllText(Path.Combine(path, @"../../scripts/database/create-tables.sql")),
    // ... other files
);

3. Apply the Change

Option A: Modify Existing Files (Preferred for clean slate)

• If adding a core table, add T-SQL to scripts/database/create-tables.sql.
• If adding a view, use scripts/database/create-views.sql.

Option B: Create New Script (For specific updates)

1. Create a new file, e.g., scripts/database/update-schema-features.sql.
2. CRITICAL: You MUST update AppHost.cs to include this new file in the string.Concat list, or it will be ignored.

4. Writing SQL

• Idempotency: Always write idempotent SQL. The script may run on container startup.

  IF NOT EXISTS (SELECT * FROM sys.tables WHERE name = 'MyTable')
  BEGIN
      CREATE TABLE MyTable (...)
  END
  

• Foreign Keys: Ensure referenced tables are created before the table defining the key (check file order in AppHost.cs).

5. Verification

• Run dotnet run --project src/MoreSpeakers.AppHost.
• The container will spin up and execute the concatenated SQL script.

PROHIBITED ACTIONS

• ❌ dotnet ef migrations add
• ❌ dotnet ef database update
• ❌ Modifying the DbContext OnModelCreating without adding corresponding SQL scripts.