Change AgeGroup ID type from int to string and add migration

Refactored AgeGroupController, AgeGroupService, and IAgeGroupService to use string IDs instead of int. Added initial Entity Framework migration and database files to support AltersGruppe with string primary key.

API/Controllers/AgeGroupController.cs

@@ -24,7 +24,7 @@ namespace API.Controllers
         }
 
         [HttpGet("{id}")]
-        public async Task<IActionResult> GetOne([FromRoute] int id)
+        public async Task<IActionResult> GetOne([FromRoute] string id)
         {
             var group = await _ageGroupService.GetAsync(id);
 
@@ -45,7 +45,7 @@ namespace API.Controllers
         }
 
         [HttpPut("{id}")]
-        public async Task<IActionResult> Update([FromRoute] int id, [FromBody] AltersGruppeIngoing groupDto)
+        public async Task<IActionResult> Update([FromRoute] string id, [FromBody] AltersGruppeIngoing groupDto)
         {
             var group = await _ageGroupService.UpdateAsync(id, groupDto.ToInternalFromIngoing());
 
@@ -58,7 +58,7 @@ namespace API.Controllers
         }
 
         [HttpDelete("{id}")]
-        public async Task<IActionResult> Delete([FromRoute] int Id)
+        public async Task<IActionResult> Delete([FromRoute] string Id)
         {
             var group = await _ageGroupService.DeleteAsync(Id);
 

API/Migrations/20251207192702_Init.Designer.cs

@@ -0,0 +1,46 @@
+// <auto-generated />
+using API.Database;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Migrations;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace API.Migrations
+{
+    [DbContext(typeof(ApplicationDbContext))]
+    [Migration("20251207192702_Init")]
+    partial class Init
+    {
+        /// <inheritdoc />
+        protected override void BuildTargetModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "9.0.11");
+
+            modelBuilder.Entity("API.Models.Internal.Altersgruppen.AltersGruppe", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasMaxLength(26)
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("EndingAge")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("StartingAge")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Altersgruppen");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

API/Migrations/20251207192702_Init.cs

@@ -0,0 +1,35 @@
+using Microsoft.EntityFrameworkCore.Migrations;
+
+#nullable disable
+
+namespace API.Migrations
+{
+    /// <inheritdoc />
+    public partial class Init : Migration
+    {
+        /// <inheritdoc />
+        protected override void Up(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.CreateTable(
+                name: "Altersgruppen",
+                columns: table => new
+                {
+                    Id = table.Column<string>(type: "TEXT", maxLength: 26, nullable: false),
+                    Name = table.Column<string>(type: "TEXT", maxLength: 100, nullable: false),
+                    StartingAge = table.Column<int>(type: "INTEGER", nullable: false),
+                    EndingAge = table.Column<int>(type: "INTEGER", nullable: false)
+                },
+                constraints: table =>
+                {
+                    table.PrimaryKey("PK_Altersgruppen", x => x.Id);
+                });
+        }
+
+        /// <inheritdoc />
+        protected override void Down(MigrationBuilder migrationBuilder)
+        {
+            migrationBuilder.DropTable(
+                name: "Altersgruppen");
+        }
+    }
+}

API/Migrations/ApplicationDbContextModelSnapshot.cs

@@ -0,0 +1,43 @@
+// <auto-generated />
+using API.Database;
+using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore.Infrastructure;
+using Microsoft.EntityFrameworkCore.Storage.ValueConversion;
+
+#nullable disable
+
+namespace API.Migrations
+{
+    [DbContext(typeof(ApplicationDbContext))]
+    partial class ApplicationDbContextModelSnapshot : ModelSnapshot
+    {
+        protected override void BuildModel(ModelBuilder modelBuilder)
+        {
+#pragma warning disable 612, 618
+            modelBuilder.HasAnnotation("ProductVersion", "9.0.11");
+
+            modelBuilder.Entity("API.Models.Internal.Altersgruppen.AltersGruppe", b =>
+                {
+                    b.Property<string>("Id")
+                        .HasMaxLength(26)
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("EndingAge")
+                        .HasColumnType("INTEGER");
+
+                    b.Property<string>("Name")
+                        .IsRequired()
+                        .HasMaxLength(100)
+                        .HasColumnType("TEXT");
+
+                    b.Property<int>("StartingAge")
+                        .HasColumnType("INTEGER");
+
+                    b.HasKey("Id");
+
+                    b.ToTable("Altersgruppen");
+                });
+#pragma warning restore 612, 618
+        }
+    }
+}

API/Repository/AgeGroup/AgeGroupService.cs

@@ -20,7 +20,7 @@ namespace API.Repository.AgeGroup
             return altersGruppe;
         }
 
-        public async Task<AltersGruppe?> DeleteAsync(int id)
+        public async Task<AltersGruppe?> DeleteAsync(string id)
         {
             var group = await _context.Altersgruppen.FirstOrDefaultAsync(x => x.Id == id);
 
@@ -42,12 +42,12 @@ namespace API.Repository.AgeGroup
             return allGroups;
         }
 
-        public async Task<AltersGruppe?> GetAsync(int id)
+        public async Task<AltersGruppe?> GetAsync(string id)
         {
             return await _context.Altersgruppen.FindAsync(id);
         }
 
-        public async Task<AltersGruppe?> UpdateAsync(int id, AltersGruppe altersGruppe)
+        public async Task<AltersGruppe?> UpdateAsync(string id, AltersGruppe altersGruppe)
         {
             var existingGroup = await _context.Altersgruppen.FirstOrDefaultAsync(x => x.Id == id);
 

API/Repository/AgeGroup/IAgeGroupService.cs

@@ -6,9 +6,9 @@ namespace API.Repository.AgeGroup
     {
         public Task<List<AltersGruppe>> GetAllAsync();
 
-        public Task<AltersGruppe?> GetAsync(int id);
+        public Task<AltersGruppe?> GetAsync(string id);
         public Task<AltersGruppe> CreateAsync(AltersGruppe altersGruppe);
-        public Task<AltersGruppe?> DeleteAsync(int id);
-        public Task<AltersGruppe?> UpdateAsync(int id, AltersGruppe altersGruppe); 
+        public Task<AltersGruppe?> DeleteAsync(string id);
+        public Task<AltersGruppe?> UpdateAsync(string id, AltersGruppe altersGruppe); 
     }
 }