surveylib/SurveyLib.Infrastructure.EFCore/Data/SurveyDbContext.cs

using Microsoft.EntityFrameworkCore;
using SurveyLib.Core.Models;
using SurveyLib.Core.Models.QuestionVariants;

namespace SurveyLib.Infrastructure.EFCore.Data;

public class SurveyDbContext : DbContext
{
    public DbSet<Survey> Surveys { get; set; }

    public DbSet<QuestionBase> Questions { get; set; }
    public DbSet<SingleAnswerQuestion> SingleAnswerQuestions { get; set; }
    public DbSet<MultipleAnswerQuestion> MultipleAnswerQuestions { get; set; }
    public DbSet<TextQuestion> TextQuestions { get; set; }

    public DbSet<AnswerVariant> AnswerVariants { get; set; }

    public DbSet<Completion> Completions { get; set; }
    public DbSet<Answer> Answers { get; set; }

    public SurveyDbContext(DbContextOptions options) : base(options)
    {
    }

    protected override void OnModelCreating(ModelBuilder modelBuilder)
    {
        modelBuilder.Entity<Answer>().HasIndex(a => new { a.CompletionId, a.QuestionId, a.AnswerText }).IsUnique();
    }
}