From b0e653ab0d20b2db2df07843ad1cb3bd95a90f34 Mon Sep 17 00:00:00 2001
From: Kevin Matsubara <kevin.matsubara@proton.me>
Date: Mon, 7 Apr 2025 11:21:48 +0200
Subject: [PATCH] Add one to one relationship between Coach and Team.

A Coach is parent, Team is child.
A Coach can exist on his own, without a Team, but a Team cannot play without a Coach.
---
 EntityFrameworkCore.Domain/Coach.cs | 2 +-
 EntityFrameworkCore.Domain/Team.cs  | 5 +++--
 2 files changed, 4 insertions(+), 3 deletions(-)

diff --git a/EntityFrameworkCore.Domain/Coach.cs b/EntityFrameworkCore.Domain/Coach.cs
index b35c6b4..c7e4977 100644
--- a/EntityFrameworkCore.Domain/Coach.cs
+++ b/EntityFrameworkCore.Domain/Coach.cs
@@ -3,6 +3,6 @@
 public class Coach : BaseDomainModel
 {
   public string Name { get; set; } // Strings are automatically become VARCHAR database types.
-  public int? TeamId { get; set; }
+  public Team? Team { get; set; }
 }
 
diff --git a/EntityFrameworkCore.Domain/Team.cs b/EntityFrameworkCore.Domain/Team.cs
index e6e8aa7..495aa34 100644
--- a/EntityFrameworkCore.Domain/Team.cs
+++ b/EntityFrameworkCore.Domain/Team.cs
@@ -5,7 +5,8 @@ public class Team : BaseDomainModel
   public string? Name { get; set; }
   public League? League { get; set; }
   public int? LeagueId { get; set; }
+  public Coach Coach { get; set; }
   public int CoachId { get; set; }
-  public List<Match> HomeMatches { get; set; }
-  public List<Match> AwayMatches { get; set; }
+  public List<Match> HomeMatches { get; set; } = new List<Match>() { };
+  public List<Match> AwayMatches { get; set; } = new List<Match>() { };
 }