\u306f\u3058\u3081\u306b<\/a>
\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u4f5c\u6210<\/a>
DB\u63a5\u7d9a\u6e96\u5099<\/a>
DB\u8a2d\u8a08<\/a>
PostgreSQL\u63a5\u7d9a\u6587\u5b57\u5217\u306e\u8a2d\u5b9a<\/a>
Model\u30af\u30e9\u30b9\u8ffd\u52a0<\/a>
DbContext\u4f5c\u6210<\/a>
\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u5b9f\u884c<\/a>
\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u306e\u4f5c\u6210<\/a>
\u30d3\u30e5\u30fc\u306e\u4f5c\u6210<\/a>
\u4ed5\u4e0a\u3052<\/a>
\u5b9f\u884c<\/a><\/p>\n\n\n\n
\u306f\u3058\u3081\u306b<\/h2>\n\n\n\n
\u4eca\u56de\u3082\u5f15\u304d\u7d9a\u304d\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u5b66\u7fd2\u306e\u4e00\u74b0\u3068\u3057\u3066C#\u3067\u30a2\u30d7\u30ea\u4f5c\u6210\u3092\u3057\u3066\u3044\u304d\u305f\u3044\u3068\u601d\u3044\u307e\u3059\u3002
\u4eca\u56de\u4f5c\u6210\u3059\u308b\u306e\u306f\u300c\u30bf\u30b9\u30af\u7ba1\u7406\u30a2\u30d7\u30ea\u300d\u3067\u3059\u3002
\u79c1\u81ea\u8eab\u3001\u30bf\u30b9\u30af\u7ba1\u7406\u304c\u82e6\u624b\u3067Google\u30ab\u30ec\u30f3\u30c0\u30fc\u306b\u4e88\u5b9a\u3092\u5165\u308c\u305f\u308a\u3001ToDo\u30ea\u30b9\u30c8\u306b\u66f8\u3044\u305f\u308a
\u30e1\u30e2\u30a2\u30d7\u30ea\u3092\u4f7f\u7528\u3057\u305f\u308a\u3001\u7d19\u306b\u8a18\u8f09\u3057\u305f\u308a\u3068\u8272\u3005\u8a66\u3057\u307e\u3057\u305f\u304c\u3069\u308c\u3082\u7d9a\u304b\u305a\u3057\u3063\u304f\u308a\u3053\u306a\u3044\u306e\u3067\u6298\u89d2\u3060\u304b\u3089
\u52c9\u5f37\u304c\u3066\u3089\u81ea\u5206\u3067\u4f5c\u3063\u3066\u307f\u3088\u3046\u3068\u601d\u3044\u4eca\u56de\u4f5c\u6210\u3092\u6c7a\u610f\u3057\u307e\u3057\u305f\u3002<\/p>\n\n\n\n
\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u4f5c\u6210<\/h2>\n\n\n\n
\u305d\u308c\u3067\u306f\u3053\u308c\u304b\u3089\u6bce\u5ea6\u306e\u3088\u3046\u306bVisual studio\u3092\u7acb\u3061\u4e0a\u3052\u3066\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u4f5c\u6210\u3059\u308b\u3068\u3053\u308d\u304b\u3089\u59cb\u3081\u307e\u3059\u3002
Visual studio\u3092\u7acb\u3061\u4e0a\u3052\u3066\u300c\u65b0\u3057\u3044\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u4f5c\u6210\u300d\u3092\u30af\u30ea\u30c3\u30af
\u300cASP.NET Core Web \u30a2\u30d7\u30ea (Model-View-Controller)\u300d\u3092\u9078\u629e
\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u540d\u306f\u300cTaskManager\u300d\u3001\u4fdd\u5b58\u5148\u306f\u4efb\u610f\u306e\u5834\u6240\u3092\u9078\u629e\u3057\u6b21\u3078
\u8ffd\u52a0\u60c5\u5831\u90e8\u5206\u306f\u3001\u4eca\u56de\u306e\u30bf\u30b9\u30af\u7ba1\u7406\u30a2\u30d7\u30ea\u306f\u5c11\u3057\u96e3\u6613\u5ea6\u3092\u4e0a\u3052\u3066\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u9023\u643a\u3084\u30e6\u30fc\u30b6\u30fc\u8a8d\u8a3c\u3092\u4ed8\u3051\u305f\u3044\u306e\u3067\u3001
\u8a8d\u8a3c\u306e\u7a2e\u985e\u306f\u300c\u500b\u5225\u306e\u30a2\u30ab\u30a6\u30f3\u30c8\u300d\u3092\u9078\u629e\u3057\u3066\u4f5c\u6210\u3092\u30af\u30ea\u30c3\u30af<\/p>\n\n\n\n
DB\u63a5\u7d9a\u6e96\u5099<\/h2>\n\n\n\n
DB\u306b\u306f\u300cPostgreSQL\u300d\u3092\u4f7f\u7528\u3059\u308b\u306e\u3067\u4e8b\u524d\u6e96\u5099\u3068\u3057\u3066NuGet\u30d1\u30c3\u30b1\u30fc\u30b8\u3092\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3057\u3066\u304a\u304d\u307e\u3059
Visual Studio\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u30b3\u30f3\u30bd\u30fc\u30eb\u3092\u958b\u3044\u3066\u4e0b\u8a18\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5b9f\u884c\u3057\u307e\u3059<\/p>\n\n\n\n
Install-Package Microsoft.AspNetCore.Identity.EntityFrameworkCore -Version 8.0.10\nInstall-Package Npgsql.EntityFrameworkCore.PostgreSQL -Version 8.0.10\nInstall-Package Microsoft.EntityFrameworkCore.Tools -Version 8.0.10<\/code><\/pre>\n\n\n\n\u4eca\u56de\u306f.NET8.0\u3092\u4f7f\u7528\u3057\u3066\u3044\u308b\u306e\u3067\u5404\u30d1\u30c3\u30b1\u30fc\u30b8\u3082\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u5408\u308f\u305b\u308b\u305f\u3081\u306b\u30d0\u30fc\u30b8\u30e7\u30f3\u6307\u5b9a\u3092\u3057\u3066\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3092\u3057\u3066\u3044\u307e\u3059
\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u5408\u308f\u305b\u306a\u3044\u3068\u4e92\u63db\u6027\u304c\u306a\u3044\u3068\u30a8\u30e9\u30fc\u304c\u51fa\u3066\u3057\u307e\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
DB\u8a2d\u8a08<\/h2>\n\n\n\n
\u30c6\u30fc\u30d6\u30eb\u69cb\u6210\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3068\u3057\u307e\u3059<\/p>\n\n\n\nTasks\uff08\u30bf\u30b9\u30af\u30c6\u30fc\u30d6\u30eb\uff09<\/td> <\/td><\/tr> Id<\/td> \u4e3b\u30ad\u30fc<\/td><\/tr> Title<\/td> \u30bf\u30a4\u30c8\u30eb<\/td><\/tr> Description<\/td> \u8aac\u660e<\/td><\/tr> DueDate<\/td> \u671f\u9650<\/td><\/tr> Priority<\/td> \u512a\u5148\u5ea6: \u9ad8\/\u4e2d\/\u4f4e<\/td><\/tr> Status<\/td> \u30b9\u30c6\u30fc\u30bf\u30b9: \u672a\u7740\u624b\/\u9032\u884c\u4e2d\/\u5b8c\u4e86<\/td><\/tr> CreatedAt<\/td> \u4f5c\u6210\u65e5\u6642<\/td><\/tr> UpdatedAt<\/td> \u66f4\u65b0\u65e5\u6642<\/td><\/tr> UserId<\/td> \u30e6\u30fc\u30b6\u30fcID – \u5916\u90e8\u30ad\u30fc<\/td><\/tr> ProjectId<\/td> \u30d7\u30ed\u30b8\u30a7\u30af\u30c8ID – \u5916\u90e8\u30ad\u30fc\u3001nullable<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nProjects\uff08\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30c6\u30fc\u30d6\u30eb\uff09<\/td> <\/td><\/tr> Id <\/td> \u4e3b\u30ad\u30fc<\/td><\/tr> Name<\/td> \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u540d<\/td><\/tr> Description<\/td> \u8aac\u660e<\/td><\/tr> UserId<\/td> \u30e6\u30fc\u30b6\u30fcID – \u5916\u90e8\u30ad\u30fc<\/td><\/tr> CreatedAt<\/td> \u4f5c\u6210\u65e5\u6642<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nTags\uff08\u30bf\u30b0\u30c6\u30fc\u30d6\u30eb\uff09<\/td> <\/td><\/tr> Id<\/td> \u4e3b\u30ad\u30fc<\/td><\/tr> Name<\/td> \u30bf\u30b0\u540d<\/td><\/tr> UserId<\/td> \u30e6\u30fc\u30b6\u30fcID – \u5916\u90e8\u30ad\u30fc<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nTaskTags\uff08\u4e2d\u9593\u30c6\u30fc\u30d6\u30eb – \u591a\u5bfe\u591a\u306e\u95a2\u4fc2\uff09<\/td> <\/td><\/tr> TaskId<\/td> \u5916\u90e8\u30ad\u30fc<\/td><\/tr> TagId<\/td> \u5916\u90e8\u30ad\u30fc<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\nPostgreSQL\u63a5\u7d9a\u6587\u5b57\u5217\u306e\u8a2d\u5b9a<\/h2>\n\n\n\n
appsettings.json\u306b\u4e0b\u8a18\u306e\u30b3\u30fc\u30c9\u3092\u8a18\u8f09\u3057\u307e\u3059
\u30b3\u30fc\u30c9\u3092\u66f8\u304f\u969b\u306b\u306f\u4ee5\u4e0b\u306e\u3053\u3068\u306b\u6ce8\u610f\u3057\u3066\u304f\u3060\u3055\u3044
Host=localhost \u2192 PostgreSQL\u304c\u52d5\u3044\u3066\u3044\u308b\u30b5\u30fc\u30d0\u30fc\uff08\u30ed\u30fc\u30ab\u30eb\u306e\u5834\u5408\u306f\u305d\u306e\u307e\u307e\uff09
Database=TaskManagerDb \u2192 \u4f5c\u6210\u3059\u308b\u30c7\u30fc\u30bf\u30d9\u30fc\u30b9\u540d
Username=postgres \u2192 PostgreSQL\u306e\u30e6\u30fc\u30b6\u30fc\u540d
Password=PostgreSQL\u306b\u30ed\u30b0\u30a4\u30f3\u3059\u308b\u969b\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\u3092\u5165\u529b<\/p>\n\n\n\n
{\n \"ConnectionStrings\": {\n \"DefaultConnection\": \"Host=localhost;Database=TaskManagerDb;Username=postgres;Password=\u3042\u306a\u305f\u306e\u30d1\u30b9\u30ef\u30fc\u30c9\"\n },\n \"Logging\": {\n \"LogLevel\": {\n \"Default\": \"Information\",\n \"Microsoft.AspNetCore\": \"Warning\"\n }\n },\n \"AllowedHosts\": \"*\"\n}<\/code><\/pre>\n\n\n\nModel\u30af\u30e9\u30b9\u8ffd\u52a0<\/h2>\n\n\n\n
\u6b21\u306bModel\u30d5\u30a9\u30eb\u30c0\u306b\u65b0\u3057\u3044\u30af\u30e9\u30b9\u3092\u8ffd\u52a0\u3057\u3066\u3044\u304d\u307e\u3059
\u30af\u30e9\u30b9\u306e\u8ffd\u52a0\u65b9\u6cd5\u306f\u8ffd\u52a0\u3057\u305f\u3044\u30d5\u30a9\u30eb\u30c0\u3092\u9078\u629e\u3057\u3066\u53f3\u30af\u30ea\u30c3\u30af\u2192\u8ffd\u52a0\u2192\u30af\u30e9\u30b9\u3088\u308a\u8ffd\u52a0\u3067\u304d\u307e\u3059
\u307e\u305a\u306fTaskPriority.cs\u3068\u3044\u3046\u540d\u524d\u306e\u30af\u30e9\u30b9\u3092\u8ffd\u52a0\u3057\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8a18\u8f09\u3057\u307e\u3059<\/p>\n\n\n\n
namespace TaskManager.Models\n{\n public enum TaskPriority\n {\n Low = 0, \/\/ \u4f4e\n Medium = 1, \/\/ \u4e2d\n High = 2 \/\/ \u9ad8\n }\n}<\/code><\/pre>\n\n\n\n\u7d9a\u3051\u3066TaskStatus.cs\u3068\u3044\u3046\u540d\u524d\u306e\u30af\u30e9\u30b9\u3092\u8ffd\u52a0\u3057\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8a18\u8f09\u3057\u307e\u3059<\/p>\n\n\n\n
namespace TaskManager.Models\n{\n public enum TaskStatus\n {\n NotStarted = 0, \/\/ \u672a\u7740\u624b\n InProgress = 1, \/\/ \u9032\u884c\u4e2d\n Completed = 2 \/\/ \u5b8c\u4e86\n }\n}<\/code><\/pre>\n\n\n\n\u7d9a\u3051\u3066Project.cs\u3092\u8ffd\u52a0\u3057\u307e\u3059<\/p>\n\n\n\n
using System.ComponentModel.DataAnnotations;\n\nnamespace TaskManager.Models\n{\n public class Project\n {\n public int Id { get; set; }\n\n [Required(ErrorMessage = \"\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u540d\u306f\u5fc5\u9808\u3067\u3059\")]\n [StringLength(100)]\n public string Name { get; set; } = string.Empty;\n\n [StringLength(500)]\n public string? Description { get; set; }\n\n public DateTime CreatedAt { get; set; } = DateTime.UtcNow;\n\n [Required]\n public string UserId { get; set; } = string.Empty;\n\n public ICollection<TaskItem> Tasks { get; set; } = new List<TaskItem>();\n }\n}<\/code><\/pre>\n\n\n\n\u7d9a\u3051\u3066Tag.cs\u3092\u8ffd\u52a0\u3057\u307e\u3059<\/p>\n\n\n\n
using System.ComponentModel.DataAnnotations;\n\nnamespace TaskManager.Models\n{\n public class Tag\n {\n public int Id { get; set; }\n\n [Required(ErrorMessage = \"\u30bf\u30b0\u540d\u306f\u5fc5\u9808\u3067\u3059\")]\n [StringLength(50)]\n public string Name { get; set; } = string.Empty;\n\n [Required]\n public string UserId { get; set; } = string.Empty;\n\n public ICollection<TaskItem> Tasks { get; set; } = new List<TaskItem>();\n }\n}<\/code><\/pre>\n\n\n\n\u6700\u5f8c\u306b\u30e1\u30a4\u30f3\u306eTaskItem.cs\u3092\u8ffd\u52a0\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
using System.ComponentModel.DataAnnotations;\n\nnamespace TaskManager.Models\n{\n public class TaskItem\n {\n public int Id { get; set; }\n\n [Required(ErrorMessage = \"\u30bf\u30a4\u30c8\u30eb\u306f\u5fc5\u9808\u3067\u3059\")]\n [StringLength(200, ErrorMessage = \"\u30bf\u30a4\u30c8\u30eb\u306f200\u6587\u5b57\u4ee5\u5185\u3067\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\")]\n public string Title { get; set; } = string.Empty;\n\n [StringLength(1000, ErrorMessage = \"\u8aac\u660e\u306f1000\u6587\u5b57\u4ee5\u5185\u3067\u5165\u529b\u3057\u3066\u304f\u3060\u3055\u3044\")]\n public string? Description { get; set; }\n\n [DataType(DataType.Date)]\n public DateTime? DueDate { get; set; }\n\n public TaskPriority Priority { get; set; } = TaskPriority.Medium;\n\n public TaskStatus Status { get; set; } = TaskStatus.NotStarted;\n\n public DateTime CreatedAt { get; set; } = DateTime.UtcNow;\n\n public DateTime UpdatedAt { get; set; } = DateTime.UtcNow;\n\n \/\/ \u30e6\u30fc\u30b6\u30fc\u3068\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\n [Required]\n public string UserId { get; set; } = string.Empty;\n\n \/\/ \u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3068\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\n public int? ProjectId { get; set; }\n public Project? Project { get; set; }\n\n \/\/ \u30bf\u30b0\u3068\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\n public ICollection<Tag> Tags { get; set; } = new List<Tag>();\n }\n}<\/code><\/pre>\n\n\n\nDbContext<\/strong>\u4f5c\u6210<\/h2>\n\n\n\nData\u30d5\u30a9\u30eb\u30c0\u306bApplicationDbContext.cs\u3092\u8ffd\u52a0\u3057\u307e\u3059
\u203b\u65e2\u306b\u3042\u308b\u5834\u5408\u306f\u305d\u3061\u3089\u306e\u4e2d\u8eab\u3092\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u306b\u66f8\u304d\u63db\u3048\u307e\u3059<\/p>\n\n\n\n
using Microsoft.AspNetCore.Identity.EntityFrameworkCore;\nusing Microsoft.EntityFrameworkCore;\nusing TaskManager.Models;\n\nnamespace TaskManager.Data\n{\n public class ApplicationDbContext : IdentityDbContext\n {\n public ApplicationDbContext(DbContextOptions<ApplicationDbContext> options)\n : base(options)\n {\n }\n\n \/\/ DbSet\u3092\u8ffd\u52a0\u3001\u5b8c\u5168\u4fee\u98fe\u540d\n public DbSet<TaskItem> TaskItems { get; set; } = null!;\n public DbSet<Project> Projects { get; set; } = null!;\n public DbSet<Tag> Tags { get; set; } = null!;\n\n protected override void OnModelCreating(ModelBuilder modelBuilder)\n {\n base.OnModelCreating(modelBuilder);\n\n \/\/ TaskItems\n modelBuilder.Entity<TaskItem>().ToTable(\"TaskItems\");\n\n \/\/ Task\u3068Tag\u306e\u591a\u5bfe\u591a\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u8a2d\u5b9a\n modelBuilder.Entity<TaskItem>()\n .HasMany(t => t.Tags)\n .WithMany(tag => tag.Tasks)\n .UsingEntity(j => j.ToTable(\"TaskTags\"));\n\n \/\/ Task\u3068Project\u306e\u30ea\u30ec\u30fc\u30b7\u30e7\u30f3\u30b7\u30c3\u30d7\u8a2d\u5b9a\n modelBuilder.Entity<TaskItem>()\n .HasOne(t => t.Project)\n .WithMany(p => p.Tasks)\n .HasForeignKey(t => t.ProjectId)\n .OnDelete(DeleteBehavior.SetNull);\n\n \/\/ \u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u8ffd\u52a0\n modelBuilder.Entity<TaskItem>()\n .HasIndex(t => t.Status);\n\n modelBuilder.Entity<TaskItem>()\n .HasIndex(t => t.DueDate);\n\n modelBuilder.Entity<TaskItem>()\n .HasIndex(t => t.UserId);\n }\n }\n}<\/code><\/pre>\n\n\n\nProgram.cs\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u4fee\u6b63\u3057\u307e\u3059<\/p>\n\n\n\n
using Microsoft.AspNetCore.Identity;\nusing Microsoft.EntityFrameworkCore;\nusing TaskManager.Data;\n\nvar builder = WebApplication.CreateBuilder(args);\n\nvar connectionString = builder.Configuration.GetConnectionString(\"DefaultConnection\") ?? throw new InvalidOperationException(\"Connection string 'DefaultConnection' not found.\");\n\nbuilder.Services.AddDbContext<ApplicationDbContext>(options =>\n options.UseNpgsql(connectionString));\n\nbuilder.Services.AddDatabaseDeveloperPageExceptionFilter();\n\nbuilder.Services.AddDefaultIdentity<IdentityUser>(options =>\n{\n options.SignIn.RequireConfirmedAccount = false;\n options.Password.RequireDigit = true;\n options.Password.RequireLowercase = true;\n options.Password.RequireUppercase = false;\n options.Password.RequireNonAlphanumeric = false;\n options.Password.RequiredLength = 6;\n})\n.AddEntityFrameworkStores<ApplicationDbContext>();\n\nbuilder.Services.AddControllersWithViews();\n\nvar app = builder.Build();\n\nif (app.Environment.IsDevelopment())\n{\n app.UseMigrationsEndPoint();\n}\nelse\n{\n app.UseExceptionHandler(\"\/Home\/Error\");\n app.UseHsts();\n}\n\napp.UseHttpsRedirection();\napp.UseStaticFiles();\n\napp.UseRouting();\n\napp.UseAuthorization();\n\napp.MapControllerRoute(\n name: \"areas\",\n pattern: \"{area:exists}\/{controller=Home}\/{action=Index}\/{id?}\");\n\napp.MapControllerRoute(\n name: \"default\",\n pattern: \"{controller=Home}\/{action=Index}\/{id?}\");\n\napp.MapRazorPages(); \/\/ \u2190 \u3053\u308c\u91cd\u8981\uff01\n\napp.Run();<\/code><\/pre>\n\n\n\n\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u5b9f\u884c<\/h2>\n\n\n\n
\u3053\u3053\u307e\u3067\u30b3\u30fc\u30c9\u304c\u66f8\u3051\u305f\u3089\u30de\u30a4\u30b0\u30ec\u30fc\u30b7\u30e7\u30f3\u3092\u5b9f\u884c\u3057\u307e\u3059
\u30d1\u30c3\u30b1\u30fc\u30b8\u30de\u30cd\u30fc\u30b8\u30e3\u30fc\u30b3\u30f3\u30bd\u30fc\u30eb\u306b\u4e0b\u8a18\u306e\u30b3\u30de\u30f3\u30c9\u3092\u5165\u529b\u3057\u307e\u3059
\u5b9f\u884c\u306b\u6210\u529f\u3059\u308b\u3068PostgreSQL\u306b\u30c6\u30fc\u30d6\u30eb\u304c\u81ea\u52d5\u3067\u751f\u6210\u3055\u308c\u307e\u3059<\/p>\n\n\n\n
Add-Migration InitialCreate\nUpdate-Database<\/code><\/pre>\n\n\n\n\u6210\u529f\u3057\u305f\u306e\u3067PostgreSQL\u3092\u958b\u3044\u3066\u30c6\u30fc\u30d6\u30eb\u304c\u51fa\u6765\u3066\u3044\u308b\u304b\u78ba\u8a8d\u3057\u307e\u3059
\u7121\u4e8b\u306b\u30c6\u30fc\u30d6\u30eb\u304c\u4f5c\u6210\u3055\u308c\u3066\u3044\u307e\u3059\uff01\uff01<\/p>\n\n\n\n![\"\"](\"https:\/\/itport.cloud\/wp-content\/uploads\/2025\/10\/\u30b9\u30af\u30ea\u30fc\u30f3\u30b7\u30e7\u30c3\u30c8-2025-10-08-175115.png\")
<\/figure>\n\n\n\n\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u306e\u4f5c\u6210<\/h2>\n\n\n\n
DB\u306e\u69cb\u7bc9\u304c\u6210\u529f\u3057\u305f\u306e\u3067\u7d9a\u3051\u3066\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc\u3092\u4f5c\u6210\u3057\u3066\u3044\u304d\u307e\u3059\u3002
Controllers\u30d5\u30a9\u30eb\u30c0\u3067\u53f3\u30af\u30ea\u30c3\u30af \u2192 \u8ffd\u52a0 \u2192 \u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc
\u300cMVC\u30b3\u30f3\u30c8\u30ed\u30fc\u30e9\u30fc – \u7a7a\u300d\u3092\u9078\u629e\u3057\u3001\u540d\u524d\u3092 \u300cTaskItemsController\u300d\u306b\u3057\u3066\u4f5c\u6210
\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8a18\u8f09<\/p>\n\n\n\n
using Microsoft.AspNetCore.Authorization;\nusing Microsoft.AspNetCore.Mvc;\nusing Microsoft.EntityFrameworkCore;\nusing TaskManager.Data;\nusing TaskManager.Models;\nusing System.Security.Claims;\n\nnamespace TaskManager.Controllers\n{\n [Authorize]\n public class TaskItemsController : Controller\n {\n private readonly ApplicationDbContext _context;\n\n public TaskItemsController(ApplicationDbContext context)\n {\n _context = context;\n }\n\n \/\/ \u4e00\u89a7\u8868\u793a\uff08GET: TaskItems\uff09\n public async Task<IActionResult> Index()\n {\n var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);\n \n var tasks = await _context.TaskItems\n .Include(t => t.Project)\n .Include(t => t.Tags)\n .Where(t => t.UserId == userId)\n .OrderByDescending(t => t.CreatedAt)\n .ToListAsync();\n\n return View(tasks);\n }\n\n \/\/ \u8a73\u7d30\u8868\u793a\uff08GET: TaskItems\/Details\/5\uff09\n public async Task<IActionResult> Details(int? id)\n {\n if (id == null)\n {\n return NotFound();\n }\n\n var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);\n \n var taskItem = await _context.TaskItems\n .Include(t => t.Project)\n .Include(t => t.Tags)\n .FirstOrDefaultAsync(m => m.Id == id && m.UserId == userId);\n\n if (taskItem == null)\n {\n return NotFound();\n }\n\n return View(taskItem);\n }\n\n \/\/ \u4f5c\u6210\u753b\u9762\u8868\u793a\uff08GET: TaskItems\/Create\uff09\n public IActionResult Create()\n {\n var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);\n \n ViewBag.Projects = _context.Projects\n .Where(p => p.UserId == userId)\n .ToList();\n\n return View();\n }\n\n \/\/ \u4f5c\u6210\u51e6\u7406\uff08POST: TaskItems\/Create\uff09\n [HttpPost]\n [ValidateAntiForgeryToken]\n public async Task<IActionResult> Create([Bind(\"Title,Description,DueDate,Priority,Status,ProjectId\")] TaskItem taskItem)\n {\n var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);\n \n \/\/ \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u3092\u30b9\u30ad\u30c3\u30d7\u3057\u3066\u5f37\u5236\u7684\u306b\u4fdd\u5b58\n ModelState.Clear();\n \n taskItem.UserId = userId;\n taskItem.CreatedAt = DateTime.UtcNow;\n taskItem.UpdatedAt = DateTime.UtcNow;\n \n _context.Add(taskItem);\n await _context.SaveChangesAsync();\n \n return RedirectToAction(nameof(Index));\n }\n\n \/\/ \u7de8\u96c6\u753b\u9762\u8868\u793a\uff08GET: TaskItems\/Edit\/5\uff09\n public async Task<IActionResult> Edit(int? id)\n {\n if (id == null)\n {\n return NotFound();\n }\n\n var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);\n \n var taskItem = await _context.TaskItems\n .FirstOrDefaultAsync(t => t.Id == id && t.UserId == userId);\n\n if (taskItem == null)\n {\n return NotFound();\n }\n\n ViewBag.Projects = _context.Projects\n .Where(p => p.UserId == userId)\n .ToList();\n\n return View(taskItem);\n }\n\n \/\/ \u7de8\u96c6\u51e6\u7406\uff08POST: TaskItems\/Edit\/5\uff09\n [HttpPost]\n [ValidateAntiForgeryToken]\n public async Task<IActionResult> Edit(int id, [Bind(\"Id,Title,Description,DueDate,Priority,Status,ProjectId,CreatedAt\")] TaskItem taskItem)\n {\n if (id != taskItem.Id)\n {\n return NotFound();\n }\n\n var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);\n\n \/\/ \u30d0\u30ea\u30c7\u30fc\u30b7\u30e7\u30f3\u30a8\u30e9\u30fc\u3092\u30b9\u30ad\u30c3\u30d7\n ModelState.Clear();\n \n try\n {\n taskItem.UserId = userId;\n taskItem.UpdatedAt = DateTime.UtcNow;\n \n _context.Update(taskItem);\n await _context.SaveChangesAsync();\n }\n catch (DbUpdateConcurrencyException)\n {\n if (!TaskItemExists(taskItem.Id))\n {\n return NotFound();\n }\n else\n {\n throw;\n }\n }\n return RedirectToAction(nameof(Index));\n }\n\n \/\/ \u524a\u9664\u78ba\u8a8d\u753b\u9762\uff08GET: TaskItems\/Delete\/5\uff09\n public async Task<IActionResult> Delete(int? id)\n {\n if (id == null)\n {\n return NotFound();\n }\n\n var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);\n \n var taskItem = await _context.TaskItems\n .Include(t => t.Project)\n .FirstOrDefaultAsync(m => m.Id == id && m.UserId == userId);\n\n if (taskItem == null)\n {\n return NotFound();\n }\n\n return View(taskItem);\n }\n\n \/\/ \u524a\u9664\u51e6\u7406\uff08POST: TaskItems\/Delete\/5\uff09\n [HttpPost, ActionName(\"Delete\")]\n [ValidateAntiForgeryToken]\n public async Task<IActionResult> DeleteConfirmed(int id)\n {\n var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);\n \n var taskItem = await _context.TaskItems\n .FirstOrDefaultAsync(t => t.Id == id && t.UserId == userId);\n\n if (taskItem != null)\n {\n _context.TaskItems.Remove(taskItem);\n await _context.SaveChangesAsync();\n }\n\n return RedirectToAction(nameof(Index));\n }\n\n private bool TaskItemExists(int id)\n {\n var userId = User.FindFirstValue(ClaimTypes.NameIdentifier);\n return _context.TaskItems.Any(e => e.Id == id && e.UserId == userId);\n }\n }\n}<\/code><\/pre>\n\n\n\n\u30d3\u30e5\u30fc\u306e\u4f5c\u6210<\/h2>\n\n\n\n
Views\/TaskItems \u30d5\u30a9\u30eb\u30c0\u3092\u4f5c\u6210
Views\u30d5\u30a9\u30eb\u30c0\u3067\u53f3\u30af\u30ea\u30c3\u30af\u2192\u8ffd\u52a0 \u2192 \u65b0\u3057\u3044\u30d5\u30a9\u30eb\u30c0\u30fc
\u30d5\u30a9\u30eb\u30c0\u540d\u3092\u300cTaskItems\u300d\u306b\u3057\u3066\u4f5c\u6210
1\u3064\u76ee: Index.cshtml\uff08\u4e00\u89a7\u753b\u9762\uff09\u3092\u4f5c\u6210
Views\/TaskItems \u30d5\u30a9\u30eb\u30c0\u3067\u53f3\u30af\u30ea\u30c3\u30af \u2192 \u8ffd\u52a0 \u2192 \u30d3\u30e5\u30fc \u2192 Razor\u30d3\u30e5\u30fc
\u540d\u524d\u306f\u3092\u300cIndex\u300d \u306b\u3057\u3066\u4f5c\u6210
\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8a18\u8f09 <\/p>\n\n\n\n
@model IEnumerable<TaskManager.Models.TaskItem>\n\n@{\n ViewData[\"Title\"] = \"\u30bf\u30b9\u30af\u4e00\u89a7\";\n}\n\n<div class=\"container mt-4\">\n <div class=\"d-flex justify-content-between align-items-center mb-4\">\n <h1>@ViewData[\"Title\"]<\/h1>\n <a asp-action=\"Create\" class=\"btn btn-primary\">\n <i class=\"bi bi-plus-circle\"><\/i> \u65b0\u3057\u3044\u30bf\u30b9\u30af\n <\/a>\n <\/div>\n\n @if (!Model.Any())\n {\n <div class=\"alert alert-info\">\n <i class=\"bi bi-info-circle\"><\/i> \u30bf\u30b9\u30af\u304c\u307e\u3060\u3042\u308a\u307e\u305b\u3093\u3002\u65b0\u3057\u3044\u30bf\u30b9\u30af\u3092\u4f5c\u6210\u3057\u307e\u3057\u3087\u3046\uff01\n <\/div>\n }\n else\n {\n <div class=\"row\">\n @foreach (var item in Model)\n {\n <div class=\"col-md-6 col-lg-4 mb-3\">\n <div class=\"card h-100 shadow-sm\">\n <div class=\"card-body\">\n <h5 class=\"card-title\">\n @Html.DisplayFor(modelItem => item.Title)\n <\/h5>\n\n @if (!string.IsNullOrEmpty(item.Description))\n {\n <p class=\"card-text text-muted\">\n @(item.Description.Length > 100 ? item.Description.Substring(0, 100) + \"...\" : item.Description)\n <\/p>\n }\n\n <div class=\"mb-2\">\n @switch (item.Priority)\n {\n case TaskManager.Models.TaskPriority.High:\n <span class=\"badge bg-danger\">\u9ad8\u512a\u5148\u5ea6<\/span>\n break;\n case TaskManager.Models.TaskPriority.Medium:\n <span class=\"badge bg-warning text-dark\">\u4e2d\u512a\u5148\u5ea6<\/span>\n break;\n case TaskManager.Models.TaskPriority.Low:\n <span class=\"badge bg-secondary\">\u4f4e\u512a\u5148\u5ea6<\/span>\n break;\n }\n\n @switch (item.Status)\n {\n case TaskManager.Models.TaskStatus.NotStarted:\n <span class=\"badge bg-light text-dark\">\u672a\u7740\u624b<\/span>\n break;\n case TaskManager.Models.TaskStatus.InProgress:\n <span class=\"badge bg-info\">\u9032\u884c\u4e2d<\/span>\n break;\n case TaskManager.Models.TaskStatus.Completed:\n <span class=\"badge bg-success\">\u5b8c\u4e86<\/span>\n break;\n }\n <\/div>\n\n @if (item.DueDate.HasValue)\n {\n <p class=\"card-text\">\n <small class=\"text-muted\">\n <i class=\"bi bi-calendar\"><\/i>\n \u671f\u9650: @item.DueDate.Value.ToLocalTime().ToString(\"yyyy\/MM\/dd\")\n <\/small>\n <\/p>\n }\n\n @if (item.Project != null)\n {\n <p class=\"card-text\">\n <small class=\"text-muted\">\n <i class=\"bi bi-folder\"><\/i> @item.Project.Name\n <\/small>\n <\/p>\n }\n <\/div>\n <div class=\"card-footer bg-transparent\">\n <a asp-action=\"Details\" asp-route-id=\"@item.Id\" class=\"btn btn-sm btn-outline-primary\">\u8a73\u7d30<\/a>\n <a asp-action=\"Edit\" asp-route-id=\"@item.Id\" class=\"btn btn-sm btn-outline-secondary\">\u7de8\u96c6<\/a>\n <a asp-action=\"Delete\" asp-route-id=\"@item.Id\" class=\"btn btn-sm btn-outline-danger\">\u524a\u9664<\/a>\n <\/div>\n <\/div>\n <\/div>\n }\n <\/div>\n }\n<\/div><\/code><\/pre>\n\n\n\n2\u3064\u76ee: Create.cshtml \u3092\u4f5c\u6210
Views\/TaskItems \u30d5\u30a9\u30eb\u30c0\u3092\u53f3\u30af\u30ea\u30c3\u30af \u2192 \u8ffd\u52a0 \u2192 \u30d3\u30e5\u30fc \u2192 Razor\u30d3\u30e5\u30fc
\u540d\u524d\u3092\u300cCreate\u300d \u306b\u3057\u3066\u4f5c\u6210
\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8a18\u8f09<\/p>\n\n\n\n
@model TaskManager.Models.TaskItem\n@{\n ViewData[\"Title\"] = \"\u65b0\u3057\u3044\u30bf\u30b9\u30af\u3092\u4f5c\u6210\";\n}\n\n<div class=\"container mt-4\">\n <div class=\"row justify-content-center\">\n <div class=\"col-md-8\">\n <h1>@ViewData[\"Title\"]<\/h1>\n <hr \/>\n \n <form action=\"\/TaskItems\/Create\" method=\"post\">\n @Html.AntiForgeryToken()\n \n <div class=\"mb-3\">\n <label for=\"Title\" class=\"form-label\">\u30bf\u30a4\u30c8\u30eb <span class=\"text-danger\">*<\/span><\/label>\n <input type=\"text\" id=\"Title\" name=\"Title\" class=\"form-control\" placeholder=\"\u30bf\u30b9\u30af\u306e\u30bf\u30a4\u30c8\u30eb\u3092\u5165\u529b\" required \/>\n <\/div>\n \n <div class=\"mb-3\">\n <label for=\"Description\" class=\"form-label\">\u8aac\u660e<\/label>\n <textarea id=\"Description\" name=\"Description\" class=\"form-control\" rows=\"4\" placeholder=\"\u30bf\u30b9\u30af\u306e\u8a73\u7d30\u3092\u5165\u529b\"><\/textarea>\n <\/div>\n \n <div class=\"row\">\n <div class=\"col-md-6 mb-3\">\n <label for=\"Priority\" class=\"form-label\">\u512a\u5148\u5ea6<\/label>\n <select id=\"Priority\" name=\"Priority\" class=\"form-select\">\n <option value=\"0\">\u4f4e<\/option>\n <option value=\"1\" selected>\u4e2d<\/option>\n <option value=\"2\">\u9ad8<\/option>\n <\/select>\n <\/div>\n \n <div class=\"col-md-6 mb-3\">\n <label for=\"Status\" class=\"form-label\">\u30b9\u30c6\u30fc\u30bf\u30b9<\/label>\n <select id=\"Status\" name=\"Status\" class=\"form-select\">\n <option value=\"0\" selected>\u672a\u7740\u624b<\/option>\n <option value=\"1\">\u9032\u884c\u4e2d<\/option>\n <option value=\"2\">\u5b8c\u4e86<\/option>\n <\/select>\n <\/div>\n <\/div>\n \n <div class=\"row\">\n <div class=\"col-md-6 mb-3\">\n <label for=\"DueDate\" class=\"form-label\">\u671f\u9650<\/label>\n <input type=\"date\" id=\"DueDate\" name=\"DueDate\" class=\"form-control\" \/>\n <\/div>\n \n <div class=\"col-md-6 mb-3\">\n <label for=\"ProjectId\" class=\"form-label\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/label>\n <select id=\"ProjectId\" name=\"ProjectId\" class=\"form-select\">\n <option value=\"\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306a\u3057<\/option>\n @if (ViewBag.Projects != null)\n {\n @foreach (var project in ViewBag.Projects as List<TaskManager.Models.Project>)\n {\n <option value=\"@project.Id\">@project.Name<\/option>\n }\n }\n <\/select>\n <\/div>\n <\/div>\n \n <div class=\"mb-3\">\n <button type=\"submit\" class=\"btn btn-primary\">\n \u4f5c\u6210\n <\/button>\n <a href=\"\/TaskItems\/Index\" class=\"btn btn-secondary\">\n \u30ad\u30e3\u30f3\u30bb\u30eb\n <\/a>\n <\/div>\n <\/form>\n <\/div>\n <\/div>\n<\/div>\n\n@section Scripts {\n @{await Html.RenderPartialAsync(\"_ValidationScriptsPartial\");}\n}<\/code><\/pre>\n\n\n\n3\u3064\u76ee: Details.cshtml\uff08\u8a73\u7d30\u753b\u9762\uff09\u3092\u4f5c\u6210
Views\/TaskItems \u30d5\u30a9\u30eb\u30c0\u3092\u53f3\u30af\u30ea\u30c3\u30af \u2192 \u8ffd\u52a0 \u2192 \u30d3\u30e5\u30fc \u2192 Razor\u30d3\u30e5\u30fc
\u540d\u524d\u3092\u300cDetails\u300d \u306b\u3057\u3066\u4f5c\u6210
\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8a18\u8f09<\/p>\n\n\n\n
@model TaskManager.Models.TaskItem\n\n@{\n ViewData[\"Title\"] = \"\u30bf\u30b9\u30af\u8a73\u7d30\";\n}\n\n<div class=\"container mt-4\">\n <div class=\"row justify-content-center\">\n <div class=\"col-md-8\">\n <div class=\"d-flex justify-content-between align-items-center mb-3\">\n <h1>@ViewData[\"Title\"]<\/h1>\n <div>\n <a asp-action=\"Edit\" asp-route-id=\"@Model.Id\" class=\"btn btn-warning\">\n <i class=\"bi bi-pencil\"><\/i> \u7de8\u96c6\n <\/a>\n <a asp-action=\"Index\" class=\"btn btn-secondary\">\n <i class=\"bi bi-arrow-left\"><\/i> \u4e00\u89a7\u306b\u623b\u308b\n <\/a>\n <\/div>\n <\/div>\n\n <div class=\"card shadow-sm\">\n <div class=\"card-body\">\n <h2 class=\"card-title mb-4\">@Html.DisplayFor(model => model.Title)<\/h2>\n\n <dl class=\"row\">\n <dt class=\"col-sm-3\">\u8aac\u660e<\/dt>\n <dd class=\"col-sm-9\">\n @if (!string.IsNullOrEmpty(Model.Description))\n {\n <p style=\"white-space: pre-wrap;\">@Model.Description<\/p>\n }\n else\n {\n <span class=\"text-muted\">\u8aac\u660e\u306a\u3057<\/span>\n }\n <\/dd>\n\n <dt class=\"col-sm-3\">\u512a\u5148\u5ea6<\/dt>\n <dd class=\"col-sm-9\">\n @switch (Model.Priority)\n {\n case TaskManager.Models.TaskPriority.High:\n <span class=\"badge bg-danger\">\u9ad8\u512a\u5148\u5ea6<\/span>\n break;\n case TaskManager.Models.TaskPriority.Medium:\n <span class=\"badge bg-warning text-dark\">\u4e2d\u512a\u5148\u5ea6<\/span>\n break;\n case TaskManager.Models.TaskPriority.Low:\n <span class=\"badge bg-secondary\">\u4f4e\u512a\u5148\u5ea6<\/span>\n break;\n }\n <\/dd>\n\n <dt class=\"col-sm-3\">\u30b9\u30c6\u30fc\u30bf\u30b9<\/dt>\n <dd class=\"col-sm-9\">\n @switch (Model.Status)\n {\n case TaskManager.Models.TaskStatus.NotStarted:\n <span class=\"badge bg-light text-dark\">\u672a\u7740\u624b<\/span>\n break;\n case TaskManager.Models.TaskStatus.InProgress:\n <span class=\"badge bg-info\">\u9032\u884c\u4e2d<\/span>\n break;\n case TaskManager.Models.TaskStatus.Completed:\n <span class=\"badge bg-success\">\u5b8c\u4e86<\/span>\n break;\n }\n <\/dd>\n\n <dt class=\"col-sm-3\">\u671f\u9650<\/dt>\n <dd class=\"col-sm-9\">\n @if (Model.DueDate.HasValue)\n {\n <i class=\"bi bi-calendar\"><\/i> \n @Model.DueDate.Value.ToLocalTime().ToString(\"yyyy\u5e74MM\u6708dd\u65e5\")\n }\n else\n {\n <span class=\"text-muted\">\u671f\u9650\u306a\u3057<\/span>\n }\n <\/dd>\n\n <dt class=\"col-sm-3\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/dt>\n <dd class=\"col-sm-9\">\n @if (Model.Project != null)\n {\n <i class=\"bi bi-folder\"><\/i> \n @Model.Project.Name\n }\n else\n {\n <span class=\"text-muted\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306a\u3057<\/span>\n }\n <\/dd>\n\n <dt class=\"col-sm-3\">\u4f5c\u6210\u65e5\u6642<\/dt>\n <dd class=\"col-sm-9\">\n @Model.CreatedAt.ToLocalTime().ToString(\"yyyy\u5e74MM\u6708dd\u65e5 HH:mm\")\n <\/dd>\n\n <dt class=\"col-sm-3\">\u66f4\u65b0\u65e5\u6642<\/dt>\n <dd class=\"col-sm-9\">\n @Model.UpdatedAt.ToLocalTime().ToString(\"yyyy\u5e74MM\u6708dd\u65e5 HH:mm\")\n <\/dd>\n <\/dl>\n <\/div>\n <\/div>\n\n <div class=\"mt-3\">\n <a asp-action=\"Delete\" asp-route-id=\"@Model.Id\" class=\"btn btn-danger\">\n <i class=\"bi bi-trash\"><\/i> \u524a\u9664\n <\/a>\n <\/div>\n <\/div>\n <\/div>\n<\/div><\/code><\/pre>\n\n\n\n4\u3064\u76ee: Edit.cshtml\uff08\u7de8\u96c6\u753b\u9762\uff09\u3092\u4f5c\u6210
Views\/TaskItems \u30d5\u30a9\u30eb\u30c0\u3092\u53f3\u30af\u30ea\u30c3\u30af \u2192 \u8ffd\u52a0 \u2192 \u30d3\u30e5\u30fc \u2192 Razor\u30d3\u30e5\u30fc
\u540d\u524d\u3092\u300cEdit\u300d \u306b\u3057\u3066\u4f5c\u6210
\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8a18\u8f09<\/p>\n\n\n\n
@model TaskManager.Models.TaskItem\n\n@{\n ViewData[\"Title\"] = \"\u30bf\u30b9\u30af\u3092\u7de8\u96c6\";\n}\n\n<div class=\"container mt-4\">\n <div class=\"row justify-content-center\">\n <div class=\"col-md-8\">\n <h1>@ViewData[\"Title\"]<\/h1>\n <hr \/>\n\n <form asp-action=\"Edit\" method=\"post\">\n <div asp-validation-summary=\"ModelOnly\" class=\"text-danger\"><\/div>\n\n <input type=\"hidden\" asp-for=\"Id\" \/>\n <input type=\"hidden\" asp-for=\"CreatedAt\" \/>\n\n <div class=\"mb-3\">\n <label asp-for=\"Title\" class=\"form-label\">\u30bf\u30a4\u30c8\u30eb <span class=\"text-danger\">*<\/span><\/label>\n <input asp-for=\"Title\" class=\"form-control\" placeholder=\"\u30bf\u30b9\u30af\u306e\u30bf\u30a4\u30c8\u30eb\u3092\u5165\u529b\" \/>\n <span asp-validation-for=\"Title\" class=\"text-danger\"><\/span>\n <\/div>\n\n <div class=\"mb-3\">\n <label asp-for=\"Description\" class=\"form-label\">\u8aac\u660e<\/label>\n <textarea asp-for=\"Description\" class=\"form-control\" rows=\"4\" placeholder=\"\u30bf\u30b9\u30af\u306e\u8a73\u7d30\u3092\u5165\u529b\"><\/textarea>\n <span asp-validation-for=\"Description\" class=\"text-danger\"><\/span>\n <\/div>\n\n <div class=\"row\">\n <div class=\"col-md-6 mb-3\">\n <label asp-for=\"Priority\" class=\"form-label\">\u512a\u5148\u5ea6<\/label>\n <select asp-for=\"Priority\" class=\"form-select\">\n <option value=\"0\">\u4f4e<\/option>\n <option value=\"1\">\u4e2d<\/option>\n <option value=\"2\">\u9ad8<\/option>\n <\/select>\n <span asp-validation-for=\"Priority\" class=\"text-danger\"><\/span>\n <\/div>\n\n <div class=\"col-md-6 mb-3\">\n <label asp-for=\"Status\" class=\"form-label\">\u30b9\u30c6\u30fc\u30bf\u30b9<\/label>\n <select asp-for=\"Status\" class=\"form-select\">\n <option value=\"0\">\u672a\u7740\u624b<\/option>\n <option value=\"1\">\u9032\u884c\u4e2d<\/option>\n <option value=\"2\">\u5b8c\u4e86<\/option>\n <\/select>\n <span asp-validation-for=\"Status\" class=\"text-danger\"><\/span>\n <\/div>\n <\/div>\n\n <div class=\"row\">\n <div class=\"col-md-6 mb-3\">\n <label asp-for=\"DueDate\" class=\"form-label\">\u671f\u9650<\/label>\n <input asp-for=\"DueDate\" type=\"date\" class=\"form-control\" \/>\n <span asp-validation-for=\"DueDate\" class=\"text-danger\"><\/span>\n <\/div>\n\n <div class=\"col-md-6 mb-3\">\n <label asp-for=\"ProjectId\" class=\"form-label\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/label>\n <select asp-for=\"ProjectId\" class=\"form-select\">\n <option value=\"\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306a\u3057<\/option>\n @foreach (var project in ViewBag.Projects as List<TaskManager.Models.Project>)\n {\n <option value=\"@project.Id\">@project.Name<\/option>\n }\n <\/select>\n <span asp-validation-for=\"ProjectId\" class=\"text-danger\"><\/span>\n <\/div>\n <\/div>\n\n <div class=\"mb-3\">\n <button type=\"submit\" class=\"btn btn-primary\">\n <i class=\"bi bi-check-circle\"><\/i> \u4fdd\u5b58\n <\/button>\n <a asp-action=\"Details\" asp-route-id=\"@Model.Id\" class=\"btn btn-secondary\">\n <i class=\"bi bi-x-circle\"><\/i> \u30ad\u30e3\u30f3\u30bb\u30eb\n <\/a>\n <\/div>\n <\/form>\n <\/div>\n <\/div>\n<\/div>\n\n@section Scripts {\n @{\n await Html.RenderPartialAsync(\"_ValidationScriptsPartial\");\n }\n}<\/code><\/pre>\n\n\n\n5\u3064\u76ee\uff08\u6700\u5f8c\uff01\uff09: Delete.cshtml\uff08\u524a\u9664\u78ba\u8a8d\u753b\u9762\uff09\u3092\u4f5c\u6210
Views\/TaskItems \u30d5\u30a9\u30eb\u30c0\u3092\u53f3\u30af\u30ea\u30c3\u30af \u2192 \u8ffd\u52a0 \u2192 \u30d3\u30e5\u30fc \u2192 Razor\u30d3\u30e5\u30fc
\u540d\u524d\u3092\u300cDelete\u300d \u306b\u3057\u3066\u4f5c\u6210
\u4ee5\u4e0b\u306e\u30b3\u30fc\u30c9\u3092\u8a18\u8f09<\/p>\n\n\n\n
@model TaskManager.Models.TaskItem\n\n@{\n ViewData[\"Title\"] = \"\u30bf\u30b9\u30af\u3092\u524a\u9664\";\n}\n\n<div class=\"container mt-4\">\n <div class=\"row justify-content-center\">\n <div class=\"col-md-8\">\n <h1 class=\"text-danger\">@ViewData[\"Title\"]<\/h1>\n <hr \/>\n\n <div class=\"alert alert-warning\">\n <i class=\"bi bi-exclamation-triangle\"><\/i>\n <strong>\u8b66\u544a:<\/strong> \u3053\u306e\u30bf\u30b9\u30af\u3092\u524a\u9664\u3057\u3066\u3082\u3088\u308d\u3057\u3044\u3067\u3059\u304b\uff1f\u3053\u306e\u64cd\u4f5c\u306f\u53d6\u308a\u6d88\u305b\u307e\u305b\u3093\u3002\n <\/div>\n\n <div class=\"card shadow-sm\">\n <div class=\"card-body\">\n <h3 class=\"card-title mb-4\">@Html.DisplayFor(model => model.Title)<\/h3>\n\n <dl class=\"row\">\n <dt class=\"col-sm-3\">\u8aac\u660e<\/dt>\n <dd class=\"col-sm-9\">\n @if (!string.IsNullOrEmpty(Model.Description))\n {\n <p style=\"white-space: pre-wrap;\">@Model.Description<\/p>\n }\n else\n {\n <span class=\"text-muted\">\u8aac\u660e\u306a\u3057<\/span>\n }\n <\/dd>\n\n <dt class=\"col-sm-3\">\u512a\u5148\u5ea6<\/dt>\n <dd class=\"col-sm-9\">\n @switch (Model.Priority)\n {\n case TaskManager.Models.TaskPriority.High:\n <span class=\"badge bg-danger\">\u9ad8\u512a\u5148\u5ea6<\/span>\n break;\n case TaskManager.Models.TaskPriority.Medium:\n <span class=\"badge bg-warning text-dark\">\u4e2d\u512a\u5148\u5ea6<\/span>\n break;\n case TaskManager.Models.TaskPriority.Low:\n <span class=\"badge bg-secondary\">\u4f4e\u512a\u5148\u5ea6<\/span>\n break;\n }\n <\/dd>\n\n <dt class=\"col-sm-3\">\u30b9\u30c6\u30fc\u30bf\u30b9<\/dt>\n <dd class=\"col-sm-9\">\n @switch (Model.Status)\n {\n case TaskManager.Models.TaskStatus.NotStarted:\n <span class=\"badge bg-light text-dark\">\u672a\u7740\u624b<\/span>\n break;\n case TaskManager.Models.TaskStatus.InProgress:\n <span class=\"badge bg-info\">\u9032\u884c\u4e2d<\/span>\n break;\n case TaskManager.Models.TaskStatus.Completed:\n <span class=\"badge bg-success\">\u5b8c\u4e86<\/span>\n break;\n }\n <\/dd>\n\n <dt class=\"col-sm-3\">\u671f\u9650<\/dt>\n <dd class=\"col-sm-9\">\n @if (Model.DueDate.HasValue)\n {\n <i class=\"bi bi-calendar\"><\/i> \n @Model.DueDate.Value.ToLocalTime().ToString(\"yyyy\u5e74MM\u6708dd\u65e5\")\n }\n else\n {\n <span class=\"text-muted\">\u671f\u9650\u306a\u3057<\/span>\n }\n <\/dd>\n\n <dt class=\"col-sm-3\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8<\/dt>\n <dd class=\"col-sm-9\">\n @if (Model.Project != null)\n {\n <i class=\"bi bi-folder\"><\/i> \n @Model.Project.Name\n }\n else\n {\n <span class=\"text-muted\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306a\u3057<\/span>\n }\n <\/dd>\n\n <dt class=\"col-sm-3\">\u4f5c\u6210\u65e5\u6642<\/dt>\n <dd class=\"col-sm-9\">\n @Model.CreatedAt.ToLocalTime().ToString(\"yyyy\u5e74MM\u6708dd\u65e5 HH:mm\")\n <\/dd>\n <\/dl>\n <\/div>\n <\/div>\n\n <form asp-action=\"Delete\" method=\"post\" class=\"mt-3\">\n <input type=\"hidden\" asp-for=\"Id\" \/>\n <button type=\"submit\" class=\"btn btn-danger\">\n <i class=\"bi bi-trash\"><\/i> \u524a\u9664\u3059\u308b\n <\/button>\n <a asp-action=\"Index\" class=\"btn btn-secondary\">\n <i class=\"bi bi-x-circle\"><\/i> \u30ad\u30e3\u30f3\u30bb\u30eb\n <\/a>\n <\/form>\n <\/div>\n <\/div>\n<\/div><\/code><\/pre>\n\n\n\n\u4ed5\u4e0a\u3052<\/h2>\n\n\n\n
\u6700\u5f8c\u306b\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30e1\u30cb\u30e5\u30fc\u3092\u8ffd\u52a0\u3057\u307e\u3059
Views\/Shared\/_Layout.cshtml\u306e\u30ca\u30d3\u30b2\u30fc\u30b7\u30e7\u30f3\u30d0\u30fc\u306e\u90e8\u5206\u306b\u30bf\u30b9\u30af\u7ba1\u7406\u3078\u306e\u30ea\u30f3\u30af\u3092\u8ffd\u52a0\u3057\u307e\u3059
_Layout.cshtml \u306e\u5168\u30b3\u30fc\u30c9\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059<\/p>\n\n\n\n
<!DOCTYPE html>\n<html lang=\"en\">\n<head>\n <meta charset=\"utf-8\" \/>\n <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\" \/>\n <title>@ViewData[\"Title\"] - TaskManager<\/title>\n <link rel=\"stylesheet\" href=\"~\/lib\/bootstrap\/dist\/css\/bootstrap.min.css\" \/>\n <link rel=\"stylesheet\" href=\"~\/css\/site.css\" asp-append-version=\"true\" \/>\n <link rel=\"stylesheet\" href=\"~\/TaskManager.styles.css\" asp-append-version=\"true\" \/>\n<\/head>\n<body>\n <header>\n <nav class=\"navbar navbar-expand-sm navbar-toggleable-sm navbar-light bg-white border-bottom box-shadow mb-3\">\n <div class=\"container-fluid\">\n <a class=\"navbar-brand\" asp-area=\"\" asp-controller=\"Home\" asp-action=\"Index\">TaskManager<\/a>\n <button class=\"navbar-toggler\" type=\"button\" data-bs-toggle=\"collapse\" data-bs-target=\".navbar-collapse\" aria-controls=\"navbarSupportedContent\"\n aria-expanded=\"false\" aria-label=\"Toggle navigation\">\n <span class=\"navbar-toggler-icon\"><\/span>\n <\/button>\n <div class=\"navbar-collapse collapse d-sm-inline-flex justify-content-between\">\n <ul class=\"navbar-nav flex-grow-1\">\n <li class=\"nav-item\">\n <a class=\"nav-link text-dark\" asp-area=\"\" asp-controller=\"Home\" asp-action=\"Index\">\u30db\u30fc\u30e0<\/a>\n <\/li>\n <li class=\"nav-item\">\n <a class=\"nav-link text-dark\" asp-area=\"\" asp-controller=\"Home\" asp-action=\"Privacy\">\u30d7\u30e9\u30a4\u30d0\u30b7\u30fc<\/a>\n <\/li>\n <li class=\"nav-item\">\n <a class=\"nav-link text-dark\" asp-controller=\"TaskItems\" asp-action=\"Index\">? \u30bf\u30b9\u30af\u7ba1\u7406<\/a>\n <\/li>\n <\/ul>\n <partial name=\"_LoginPartial\" \/>\n <\/div>\n <\/div>\n <\/nav>\n <\/header>\n <div class=\"container\">\n <main role=\"main\" class=\"pb-3\">\n @RenderBody()\n <\/main>\n <\/div>\n\n <footer class=\"border-top footer text-muted\">\n <div class=\"container\">\n © 2025 - TaskManager - <a asp-area=\"\" asp-controller=\"Home\" asp-action=\"Privacy\">Privacy<\/a>\n <\/div>\n <\/footer>\n <script src=\"~\/lib\/jquery\/dist\/jquery.min.js\"><\/script>\n <script src=\"~\/lib\/bootstrap\/dist\/js\/bootstrap.bundle.min.js\"><\/script>\n <script src=\"~\/js\/site.js\" asp-append-version=\"true\"><\/script>\n @await RenderSectionAsync(\"Scripts\", required: false)\n<\/body>\n<\/html>\n<\/code><\/pre>\n\n\n\n\u5b9f\u884c<\/h2>\n\n\n\n
\u3053\u308c\u3067\u4e00\u901a\u308a\u30d7\u30ed\u30b0\u30e9\u30e0\u304c\u5b8c\u6210\u3057\u305f\u306e\u3067\u5b9f\u884c\u3057\u3066\u307f\u307e\u3059
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