added more question variants

SurveyLib.Core/Models/AnswerVariant.cs

@@ -0,0 +1,10 @@
+namespace SurveyLib.Core.Models;
+
+public class AnswerVariant
+{
+    public int Id { get; set; }
+    public int QuestionId { get; set; }
+    public string Text { get; set; }
+
+    public QuestionBase Question { get; set; }
+}

SurveyLib.Core/Models/MultipleAnswerQuestion.cs

@@ -0,0 +1,6 @@
+namespace SurveyLib.Core.Models;
+
+public class MultipleAnswerQuestion : QuestionBase
+{
+    public ICollection<AnswerVariant> AnswerVariants { get; set; }
+}

SurveyLib.Core/Models/QuestionBase.cs

@@ -6,6 +6,8 @@ public class QuestionBase
     public int SurveyId { get; set; }
     public string Title { get; set; }
 
+    public string Discriminator { get; set; }
+
     public Survey Survey { get; set; }
     public ICollection<Answer> Answers { get; set; }
 }

SurveyLib.Core/Models/SingleAnswerQuestion.cs

@@ -0,0 +1,6 @@
+namespace SurveyLib.Core.Models;
+
+public class SingleAnswerQuestion : QuestionBase
+{
+    public ICollection<AnswerVariant> AnswerVariants { get; set; }
+}

SurveyLib.Core/Models/TextQuestion.cs

@@ -0,0 +1,5 @@
+namespace SurveyLib.Core.Models;
+
+public class TextQuestion : QuestionBase
+{
+}

SurveyLib.Infrastructure.EFCore/Data/SurveyDbContext.cs

@@ -6,12 +6,16 @@ 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<Completion> Completions { get; set; }
     public DbSet<Answer> Answers { get; set; }
 
     public SurveyDbContext(DbContextOptions<SurveyDbContext> options) : base(options)
     {
-        
     }
 }