├── .gitignore ├── EFCoreEleganceUse.Core └── EFCoreEleganceUse.Core.csproj ├── EFCoreEleganceUse.Domain ├── EFCoreEleganceUse.Domain.csproj ├── EFCoreEleganceUseDomainModule.cs ├── Entities │ ├── AggregateRoot.cs │ ├── Book.cs │ ├── Config │ │ ├── BookConfig.cs │ │ ├── EntityTypeConfiguration.cs │ │ └── UserConfig.cs │ ├── EFEntityInfo.cs │ ├── IEFEntity.cs │ ├── ISoftDelete.cs │ └── User.cs └── Repository │ ├── IAsyncRepository.cs │ └── IWorkUnit.cs ├── EFCoreEleganceUse.EF.Migrations ├── EFCoreEleganceUse.EF.Migrations.csproj └── Migrations │ ├── 20221128052101_InitializeDatabase.Designer.cs │ ├── 20221128052101_InitializeDatabase.cs │ └── LibraryDbContextModelSnapshot.cs ├── EFCoreEleganceUse.EF.Mysql ├── EFCoreEleganceUse.EF.Mysql.csproj ├── EFCoreEleganceUseEFCoreModule.cs ├── LibraryDbContext.cs ├── MysqlOptions.cs └── Repository │ ├── GenericRepository.cs │ └── WorkUnit.cs ├── EFCoreEleganceUse.sln ├── EFCoreEleganceUse ├── EFCoreEleganceUse.csproj ├── Program.cs ├── UsersController.cs └── appsettings.Development.json └── README.md /.gitignore: -------------------------------------------------------------------------------- 1 | ## Ignore Visual Studio temporary files, build results, and 2 | ## files generated by popular Visual Studio add-ons. 3 | ## 4 | ## Get latest from https://github.com/github/gitignore/blob/master/VisualStudio.gitignore 5 | 6 | # User-specific files 7 | *.rsuser 8 | *.suo 9 | *.user 10 | *.userosscache 11 | *.sln.docstates 12 | 13 | # User-specific files (MonoDevelop/Xamarin Studio) 14 | *.userprefs 15 | 16 | # Mono auto generated files 17 | mono_crash.* 18 | 19 | # Build results 20 | [Dd]ebug/ 21 | [Dd]ebugPublic/ 22 | [Rr]elease/ 23 | [Rr]eleases/ 24 | x64/ 25 | x86/ 26 | [Aa][Rr][Mm]/ 27 | [Aa][Rr][Mm]64/ 28 | bld/ 29 | [Bb]in/ 30 | [Oo]bj/ 31 | [Ll]og/ 32 | [Ll]ogs/ 33 | 34 | # Visual Studio 2015/2017 cache/options directory 35 | .vs/ 36 | # Uncomment if you have tasks that create the project's static files in wwwroot 37 | #wwwroot/ 38 | 39 | # Visual Studio 2017 auto generated files 40 | Generated\ Files/ 41 | 42 | # MSTest test Results 43 | [Tt]est[Rr]esult*/ 44 | [Bb]uild[Ll]og.* 45 | 46 | # NUnit 47 | *.VisualState.xml 48 | TestResult.xml 49 | nunit-*.xml 50 | 51 | # Build Results of an ATL Project 52 | [Dd]ebugPS/ 53 | [Rr]eleasePS/ 54 | dlldata.c 55 | 56 | # Benchmark Results 57 | BenchmarkDotNet.Artifacts/ 58 | 59 | # .NET Core 60 | project.lock.json 61 | project.fragment.lock.json 62 | artifacts/ 63 | 64 | # StyleCop 65 | StyleCopReport.xml 66 | 67 | # Files built by Visual Studio 68 | *_i.c 69 | *_p.c 70 | *_h.h 71 | *.ilk 72 | *.meta 73 | *.obj 74 | *.iobj 75 | *.pch 76 | *.pdb 77 | *.ipdb 78 | *.pgc 79 | *.pgd 80 | *.rsp 81 | *.sbr 82 | *.tlb 83 | *.tli 84 | *.tlh 85 | *.tmp 86 | *.tmp_proj 87 | *_wpftmp.csproj 88 | *.log 89 | *.vspscc 90 | *.vssscc 91 | .builds 92 | *.pidb 93 | *.svclog 94 | *.scc 95 | 96 | # Chutzpah Test files 97 | _Chutzpah* 98 | 99 | # Visual C++ cache files 100 | ipch/ 101 | *.aps 102 | *.ncb 103 | *.opendb 104 | *.opensdf 105 | *.sdf 106 | *.cachefile 107 | *.VC.db 108 | *.VC.VC.opendb 109 | 110 | # Visual Studio profiler 111 | *.psess 112 | *.vsp 113 | *.vspx 114 | *.sap 115 | 116 | # Visual Studio Trace Files 117 | *.e2e 118 | 119 | # TFS 2012 Local Workspace 120 | $tf/ 121 | 122 | # Guidance Automation Toolkit 123 | *.gpState 124 | 125 | # ReSharper is a .NET coding add-in 126 | _ReSharper*/ 127 | *.[Rr]e[Ss]harper 128 | *.DotSettings.user 129 | 130 | # TeamCity is a build add-in 131 | _TeamCity* 132 | 133 | # DotCover is a Code Coverage Tool 134 | *.dotCover 135 | 136 | # AxoCover is a Code Coverage Tool 137 | .axoCover/* 138 | !.axoCover/settings.json 139 | 140 | # Coverlet is a free, cross platform Code Coverage Tool 141 | coverage*[.json, .xml, .info] 142 | 143 | # Visual Studio code coverage results 144 | *.coverage 145 | *.coveragexml 146 | 147 | # NCrunch 148 | _NCrunch_* 149 | .*crunch*.local.xml 150 | nCrunchTemp_* 151 | 152 | # MightyMoose 153 | *.mm.* 154 | AutoTest.Net/ 155 | 156 | # Web workbench (sass) 157 | .sass-cache/ 158 | 159 | # Installshield output folder 160 | [Ee]xpress/ 161 | 162 | # DocProject is a documentation generator add-in 163 | DocProject/buildhelp/ 164 | DocProject/Help/*.HxT 165 | DocProject/Help/*.HxC 166 | DocProject/Help/*.hhc 167 | DocProject/Help/*.hhk 168 | DocProject/Help/*.hhp 169 | DocProject/Help/Html2 170 | DocProject/Help/html 171 | 172 | # Click-Once directory 173 | publish/ 174 | 175 | # Publish Web Output 176 | *.[Pp]ublish.xml 177 | *.azurePubxml 178 | # Note: Comment the next line if you want to checkin your web deploy settings, 179 | # but database connection strings (with potential passwords) will be unencrypted 180 | *.pubxml 181 | *.publishproj 182 | 183 | # Microsoft Azure Web App publish settings. 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436 | ## Visual Studio Code 437 | ## 438 | .vscode 439 | .vscode/* 440 | !.vscode/settings.json 441 | !.vscode/tasks.json 442 | !.vscode/launch.json 443 | !.vscode/extensions.json 444 | 445 | *.pro.user 446 | /server/business/plugins/mfoht030v2.common/main/vehicle/telegrams/InstallCommandResponse.cs 447 | /server/business/plugins/mfoht030v2.common/main/vehicle/telegrams/RemoveCommandRequest.cs 448 | /server/business/plugins/mfoht030v2.common/main/vehicle/telegrams/RemoveCommandResponse.cs 449 | /server/business/share/apibase/main/data/order/MSTCRemoveVehicleCommand.cs 450 | /server/business/share/apibase/main/data/order/MSTCInstallVehicleCommand.cs 451 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Core/EFCoreEleganceUse.Core.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | net6.0 5 | enable 6 | enable 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/EFCoreEleganceUse.Domain.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | net6.0 5 | enable 6 | enable 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/EFCoreEleganceUseDomainModule.cs: -------------------------------------------------------------------------------- 1 | using Autofac; 2 | using EFCoreEleganceUse.Domain.Entities; 3 | 4 | namespace EFCoreEleganceUse.Domain 5 | { 6 | public class EFCoreEleganceUseDomainModule : Module 7 | { 8 | protected override void Load(ContainerBuilder builder) 9 | { 10 | builder.RegisterType().SingleInstance(); 11 | } 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/Entities/AggregateRoot.cs: -------------------------------------------------------------------------------- 1 | namespace EFCoreEleganceUse.Domain.Entities 2 | { 3 | public abstract class AggregateRoot : IEFEntity 4 | { 5 | public TKey Id { get; set; } 6 | } 7 | } 8 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/Entities/Book.cs: -------------------------------------------------------------------------------- 1 | namespace EFCoreEleganceUse.Domain.Entities 2 | { 3 | public class Book : AggregateRoot 4 | { 5 | public string BookName { get; set; } 6 | public string Author { get; set; } 7 | public double Price { get; set; } 8 | public string Publisher { get; set; } 9 | public string SN { get; set; } //图书序列号 10 | public string? UserId { get; set; } 11 | public virtual User? User { get; set; } //租借该书的用户 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/Entities/Config/BookConfig.cs: -------------------------------------------------------------------------------- 1 | using Microsoft.EntityFrameworkCore.Metadata.Builders; 2 | 3 | namespace EFCoreEleganceUse.Domain.Entities.Config 4 | { 5 | public class BookConfig : EntityTypeConfiguration 6 | { 7 | public override void Configure(EntityTypeBuilder builder) 8 | { 9 | base.Configure(builder); 10 | 11 | builder.Property(x => x.Id).ValueGeneratedOnAdd(); //设置book的id自增 12 | builder.Property(x => x.BookName).HasMaxLength(500).IsRequired(); 13 | builder.HasIndex(x => x.Author);//作者添加索引 14 | builder.HasIndex(x => x.SN).IsUnique();//序列号添加唯一索引 15 | builder.HasOne(r => r.User).WithMany(x => x.Books) 16 | .HasForeignKey(r => r.UserId).IsRequired(false);//导航属性，本质就是创建外键，虽然查询很方便，生产中不建议使用！！！ 17 | } 18 | } 19 | } 20 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/Entities/Config/EntityTypeConfiguration.cs: -------------------------------------------------------------------------------- 1 | using Microsoft.EntityFrameworkCore; 2 | using Microsoft.EntityFrameworkCore.Metadata.Builders; 3 | 4 | namespace EFCoreEleganceUse.Domain.Entities.Config 5 | { 6 | public abstract class EntityTypeConfiguration : IEntityTypeConfiguration 7 | where TEntity : AggregateRoot 8 | { 9 | public virtual void Configure(EntityTypeBuilder builder) 10 | { 11 | var entityType = typeof(TEntity); 12 | 13 | builder.HasKey(x => x.Id); 14 | 15 | if (typeof(ISoftDelete).IsAssignableFrom(entityType)) 16 | { 17 | builder.HasQueryFilter(d => EF.Property(d, "IsDeleted") == false); 18 | } 19 | } 20 | } 21 | } 22 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/Entities/Config/UserConfig.cs: -------------------------------------------------------------------------------- 1 | using Microsoft.EntityFrameworkCore.Metadata.Builders; 2 | 3 | namespace EFCoreEleganceUse.Domain.Entities.Config 4 | { 5 | public class UserConfig : EntityTypeConfiguration 6 | { 7 | public override void Configure(EntityTypeBuilder builder) 8 | { 9 | base.Configure(builder); 10 | 11 | builder.Property(x => x.UserName).HasMaxLength(50); 12 | //mock一条数据 13 | builder.HasData(new User() 14 | { 15 | Id = "090213204", 16 | UserName = "Bruce", 17 | Birthday = DateTime.Parse("1996-08-24") 18 | }); 19 | } 20 | } 21 | } 22 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/Entities/EFEntityInfo.cs: -------------------------------------------------------------------------------- 1 | using System.Reflection; 2 | 3 | namespace EFCoreEleganceUse.Domain.Entities 4 | { 5 | public class EFEntityInfo 6 | { 7 | public (Assembly Assembly, IEnumerable Types) EFEntitiesInfo => (GetType().Assembly, GetEntityTypes(GetType().Assembly)); 8 | private IEnumerable GetEntityTypes(Assembly assembly) 9 | { 10 | var efEntities = assembly.GetTypes().Where(m => m.FullName != null 11 | && Array.Exists(m.GetInterfaces(), t => t.IsGenericType && t.GetGenericTypeDefinition() == typeof(IEFEntity<>)) 12 | && !m.IsAbstract && !m.IsInterface).ToArray(); 13 | 14 | return efEntities; 15 | } 16 | } 17 | } 18 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/Entities/IEFEntity.cs: -------------------------------------------------------------------------------- 1 | namespace EFCoreEleganceUse.Domain.Entities 2 | { 3 | public interface IEFEntity 4 | { 5 | public TKey Id { get; set; } 6 | } 7 | } 8 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/Entities/ISoftDelete.cs: -------------------------------------------------------------------------------- 1 | namespace EFCoreEleganceUse.Domain.Entities 2 | { 3 | public interface ISoftDelete 4 | { 5 | bool IsDeleted { get; set; } 6 | } 7 | } 8 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/Entities/User.cs: -------------------------------------------------------------------------------- 1 | using System.ComponentModel.DataAnnotations; 2 | 3 | namespace EFCoreEleganceUse.Domain.Entities 4 | { 5 | public class User : AggregateRoot 6 | { 7 | public string UserName { get; set; } 8 | public DateTime Birthday { get; set; } 9 | public virtual ICollection Books { get; set; } //该用户所借的书 10 | } 11 | } 12 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/Repository/IAsyncRepository.cs: -------------------------------------------------------------------------------- 1 | using System.Linq.Expressions; 2 | 3 | namespace EFCoreEleganceUse.Domain.Repository 4 | { 5 | public interface IAsyncRepository where TEntity : class 6 | { 7 | // query 8 | IQueryable All(); 9 | IQueryable All(string[] propertiesToInclude); 10 | IQueryable Where(Expression> filter); 11 | IQueryable Where(Expression> filter, string[] propertiesToInclude); 12 | } 13 | } 14 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.Domain/Repository/IWorkUnit.cs: -------------------------------------------------------------------------------- 1 | namespace EFCoreEleganceUse.Domain.Repository 2 | { 3 | public interface IWorkUnit 4 | { 5 | Task SaveAsync(); 6 | } 7 | } 8 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.EF.Migrations/EFCoreEleganceUse.EF.Migrations.csproj: -------------------------------------------------------------------------------- 1 | 2 | 3 | 4 | net6.0 5 | enable 6 | enable 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.EF.Migrations/Migrations/20221128052101_InitializeDatabase.Designer.cs: -------------------------------------------------------------------------------- 1 | // 2 | using System; 3 | using EFCoreEleganceUse.EF.Mysql; 4 | using Microsoft.EntityFrameworkCore; 5 | using Microsoft.EntityFrameworkCore.Infrastructure; 6 | using Microsoft.EntityFrameworkCore.Migrations; 7 | using Microsoft.EntityFrameworkCore.Storage.ValueConversion; 8 | 9 | #nullable disable 10 | 11 | namespace EFCoreEleganceUse.EF.Migrations.Migrations 12 | { 13 | [DbContext(typeof(LibraryDbContext))] 14 | [Migration("20221128052101_InitializeDatabase")] 15 | partial class InitializeDatabase 16 | { 17 | protected override void BuildTargetModel(ModelBuilder modelBuilder) 18 | { 19 | #pragma warning disable 612, 618 20 | modelBuilder 21 | .HasAnnotation("ProductVersion", "6.0.5") 22 | .HasAnnotation("Relational:MaxIdentifierLength", 64); 23 | 24 | MySqlModelBuilderExtensions.HasCharSet(modelBuilder, "utf8mb4 "); 25 | 26 | modelBuilder.Entity("EFCoreEleganceUse.Domain.Entities.Book", b => 27 | { 28 | b.Property("Id") 29 | .ValueGeneratedOnAdd() 30 | .HasColumnType("bigint"); 31 | 32 | b.Property("Author") 33 | .IsRequired() 34 | .HasColumnType("varchar(95)"); 35 | 36 | b.Property("BookName") 37 | .IsRequired() 38 | .HasMaxLength(500) 39 | .HasColumnType("varchar(500)"); 40 | 41 | b.Property("Price") 42 | .HasColumnType("double"); 43 | 44 | b.Property("Publisher") 45 | .IsRequired() 46 | .HasColumnType("longtext"); 47 | 48 | b.Property("SN") 49 | .IsRequired() 50 | .HasColumnType("varchar(95)"); 51 | 52 | b.Property("UserId") 53 | .IsRequired() 54 | .HasColumnType("varchar(95)"); 55 | 56 | b.HasKey("Id"); 57 | 58 | b.HasIndex("Author"); 59 | 60 | b.HasIndex("SN") 61 | .IsUnique(); 62 | 63 | b.HasIndex("UserId"); 64 | 65 | b.ToTable("Book"); 66 | }); 67 | 68 | modelBuilder.Entity("EFCoreEleganceUse.Domain.Entities.User", b => 69 | { 70 | b.Property("Id") 71 | .HasColumnType("varchar(95)"); 72 | 73 | b.Property("Birthday") 74 | .HasColumnType("datetime"); 75 | 76 | b.Property("UserName") 77 | .IsRequired() 78 | .HasMaxLength(50) 79 | .HasColumnType("varchar(50)"); 80 | 81 | b.HasKey("Id"); 82 | 83 | b.ToTable("User"); 84 | 85 | b.HasData( 86 | new 87 | { 88 | Id = "090213204", 89 | Birthday = new DateTime(1996, 8, 24, 0, 0, 0, 0, DateTimeKind.Unspecified), 90 | UserName = "Bruce" 91 | }); 92 | }); 93 | 94 | modelBuilder.Entity("EFCoreEleganceUse.Domain.Entities.Book", b => 95 | { 96 | b.HasOne("EFCoreEleganceUse.Domain.Entities.User", "User") 97 | .WithMany("Books") 98 | .HasForeignKey("UserId") 99 | .OnDelete(DeleteBehavior.Cascade) 100 | .IsRequired(); 101 | 102 | b.Navigation("User"); 103 | }); 104 | 105 | modelBuilder.Entity("EFCoreEleganceUse.Domain.Entities.User", b => 106 | { 107 | b.Navigation("Books"); 108 | }); 109 | #pragma warning restore 612, 618 110 | } 111 | } 112 | } 113 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.EF.Migrations/Migrations/20221128052101_InitializeDatabase.cs: -------------------------------------------------------------------------------- 1 | using System; 2 | using Microsoft.EntityFrameworkCore.Metadata; 3 | using Microsoft.EntityFrameworkCore.Migrations; 4 | 5 | #nullable disable 6 | 7 | namespace EFCoreEleganceUse.EF.Migrations.Migrations 8 | { 9 | public partial class InitializeDatabase : Migration 10 | { 11 | protected override void Up(MigrationBuilder migrationBuilder) 12 | { 13 | migrationBuilder.AlterDatabase() 14 | .Annotation("MySql:CharSet", "utf8mb4 "); 15 | 16 | migrationBuilder.CreateTable( 17 | name: "User", 18 | columns: table => new 19 | { 20 | Id = table.Column(type: "varchar(95)", nullable: false) 21 | .Annotation("MySql:CharSet", "utf8mb4 "), 22 | UserName = table.Column(type: "varchar(50)", maxLength: 50, nullable: false) 23 | .Annotation("MySql:CharSet", "utf8mb4 "), 24 | Birthday = table.Column(type: "datetime", nullable: false) 25 | }, 26 | constraints: table => 27 | { 28 | table.PrimaryKey("PK_User", x => x.Id); 29 | }) 30 | .Annotation("MySql:CharSet", "utf8mb4 "); 31 | 32 | migrationBuilder.CreateTable( 33 | name: "Book", 34 | columns: table => new 35 | { 36 | Id = table.Column(type: "bigint", nullable: false) 37 | .Annotation("MySql:ValueGenerationStrategy", MySqlValueGenerationStrategy.IdentityColumn), 38 | BookName = table.Column(type: "varchar(500)", maxLength: 500, nullable: false) 39 | .Annotation("MySql:CharSet", "utf8mb4 "), 40 | Author = table.Column(type: "varchar(95)", nullable: false) 41 | .Annotation("MySql:CharSet", "utf8mb4 "), 42 | Price = table.Column(type: "double", nullable: false), 43 | Publisher = table.Column(type: "longtext", nullable: false) 44 | .Annotation("MySql:CharSet", "utf8mb4 "), 45 | SN = table.Column(type: "varchar(95)", nullable: false) 46 | .Annotation("MySql:CharSet", "utf8mb4 "), 47 | UserId = table.Column(type: "varchar(95)", nullable: false) 48 | .Annotation("MySql:CharSet", "utf8mb4 ") 49 | }, 50 | constraints: table => 51 | { 52 | table.PrimaryKey("PK_Book", x => x.Id); 53 | table.ForeignKey( 54 | name: "FK_Book_User_UserId", 55 | column: x => x.UserId, 56 | principalTable: "User", 57 | principalColumn: "Id", 58 | onDelete: ReferentialAction.Cascade); 59 | }) 60 | .Annotation("MySql:CharSet", "utf8mb4 "); 61 | 62 | migrationBuilder.InsertData( 63 | table: "User", 64 | columns: new[] { "Id", "Birthday", "UserName" }, 65 | values: new object[] { "090213204", new DateTime(1996, 8, 24, 0, 0, 0, 0, DateTimeKind.Unspecified), "Bruce" }); 66 | 67 | migrationBuilder.CreateIndex( 68 | name: "IX_Book_Author", 69 | table: "Book", 70 | column: "Author"); 71 | 72 | migrationBuilder.CreateIndex( 73 | name: "IX_Book_SN", 74 | table: "Book", 75 | column: "SN", 76 | unique: true); 77 | 78 | migrationBuilder.CreateIndex( 79 | name: "IX_Book_UserId", 80 | table: "Book", 81 | column: "UserId"); 82 | } 83 | 84 | protected override void Down(MigrationBuilder migrationBuilder) 85 | { 86 | migrationBuilder.DropTable( 87 | name: "Book"); 88 | 89 | migrationBuilder.DropTable( 90 | name: "User"); 91 | } 92 | } 93 | } 94 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.EF.Migrations/Migrations/LibraryDbContextModelSnapshot.cs: -------------------------------------------------------------------------------- 1 | // 2 | using System; 3 | using EFCoreEleganceUse.EF.Mysql; 4 | using Microsoft.EntityFrameworkCore; 5 | using Microsoft.EntityFrameworkCore.Infrastructure; 6 | using Microsoft.EntityFrameworkCore.Storage.ValueConversion; 7 | 8 | #nullable disable 9 | 10 | namespace EFCoreEleganceUse.EF.Migrations.Migrations 11 | { 12 | [DbContext(typeof(LibraryDbContext))] 13 | partial class LibraryDbContextModelSnapshot : ModelSnapshot 14 | { 15 | protected override void BuildModel(ModelBuilder modelBuilder) 16 | { 17 | #pragma warning disable 612, 618 18 | modelBuilder 19 | .HasAnnotation("ProductVersion", "6.0.5") 20 | .HasAnnotation("Relational:MaxIdentifierLength", 64); 21 | 22 | MySqlModelBuilderExtensions.HasCharSet(modelBuilder, "utf8mb4 "); 23 | 24 | modelBuilder.Entity("EFCoreEleganceUse.Domain.Entities.Book", b => 25 | { 26 | b.Property("Id") 27 | .ValueGeneratedOnAdd() 28 | .HasColumnType("bigint"); 29 | 30 | b.Property("Author") 31 | .IsRequired() 32 | .HasColumnType("varchar(95)"); 33 | 34 | b.Property("BookName") 35 | .IsRequired() 36 | .HasMaxLength(500) 37 | .HasColumnType("varchar(500)"); 38 | 39 | b.Property("Price") 40 | .HasColumnType("double"); 41 | 42 | b.Property("Publisher") 43 | .IsRequired() 44 | .HasColumnType("longtext"); 45 | 46 | b.Property("SN") 47 | .IsRequired() 48 | .HasColumnType("varchar(95)"); 49 | 50 | b.Property("UserId") 51 | .IsRequired() 52 | .HasColumnType("varchar(95)"); 53 | 54 | b.HasKey("Id"); 55 | 56 | b.HasIndex("Author"); 57 | 58 | b.HasIndex("SN") 59 | .IsUnique(); 60 | 61 | b.HasIndex("UserId"); 62 | 63 | b.ToTable("Book"); 64 | }); 65 | 66 | modelBuilder.Entity("EFCoreEleganceUse.Domain.Entities.User", b => 67 | { 68 | b.Property("Id") 69 | .HasColumnType("varchar(95)"); 70 | 71 | b.Property("Birthday") 72 | .HasColumnType("datetime"); 73 | 74 | b.Property("UserName") 75 | .IsRequired() 76 | .HasMaxLength(50) 77 | .HasColumnType("varchar(50)"); 78 | 79 | b.HasKey("Id"); 80 | 81 | b.ToTable("User"); 82 | 83 | b.HasData( 84 | new 85 | { 86 | Id = "090213204", 87 | Birthday = new DateTime(1996, 8, 24, 0, 0, 0, 0, DateTimeKind.Unspecified), 88 | UserName = "Bruce" 89 | }); 90 | }); 91 | 92 | modelBuilder.Entity("EFCoreEleganceUse.Domain.Entities.Book", b => 93 | { 94 | b.HasOne("EFCoreEleganceUse.Domain.Entities.User", "User") 95 | .WithMany("Books") 96 | .HasForeignKey("UserId") 97 | .OnDelete(DeleteBehavior.Cascade) 98 | .IsRequired(); 99 | 100 | b.Navigation("User"); 101 | }); 102 | 103 | modelBuilder.Entity("EFCoreEleganceUse.Domain.Entities.User", b => 104 | { 105 | b.Navigation("Books"); 106 | }); 107 | #pragma warning restore 612, 618 108 | } 109 | } 110 | } 111 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.EF.Mysql/EFCoreEleganceUse.EF.Mysql.csproj: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | net6.0 5 | enable 6 | enable 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.EF.Mysql/EFCoreEleganceUseEFCoreModule.cs: -------------------------------------------------------------------------------- 1 | using Autofac; 2 | using EFCoreEleganceUse.Domain; 3 | using EFCoreEleganceUse.Domain.Repository; 4 | using EFCoreEleganceUse.EF.Mysql.Repository; 5 | 6 | namespace EFCoreEleganceUse.EF.Mysql 7 | { 8 | public class EFCoreEleganceUseEFCoreModule : Module 9 | { 10 | protected override void Load(ContainerBuilder builder) 11 | { 12 | base.Load(builder); 13 | 14 | builder.RegisterModule(); //注入domain模块 15 | builder.RegisterGeneric(typeof(GenericRepository<,>))//将dbcontext注入到仓储的构造中 16 | .UsingConstructor(typeof(LibraryDbContext)) 17 | .AsImplementedInterfaces() 18 | .InstancePerDependency(); 19 | 20 | builder.RegisterType().As().InstancePerDependency(); 21 | } 22 | } 23 | } 24 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.EF.Mysql/LibraryDbContext.cs: -------------------------------------------------------------------------------- 1 | using EFCoreEleganceUse.Domain.Entities; 2 | using Microsoft.EntityFrameworkCore; 3 | 4 | namespace EFCoreEleganceUse.EF.Mysql 5 | { 6 | /// 7 | /// 图书馆数据库上下文 8 | /// 9 | public class LibraryDbContext : DbContext 10 | { 11 | private readonly EFEntityInfo _efEntitysInfo; 12 | 13 | public LibraryDbContext(DbContextOptions options, EFEntityInfo efEntityInfo) : base(options) 14 | { 15 | _efEntitysInfo = efEntityInfo; 16 | ChangeTracker.QueryTrackingBehavior = QueryTrackingBehavior.NoTracking; 17 | } 18 | 19 | protected override void OnModelCreating(ModelBuilder modelBuilder) 20 | { 21 | modelBuilder.HasCharSet("utf8mb4 "); 22 | var (Assembly, Types) = _efEntitysInfo.EFEntitiesInfo; 23 | foreach (var entityType in Types) 24 | { 25 | modelBuilder.Entity(entityType); 26 | } 27 | modelBuilder.ApplyConfigurationsFromAssembly(Assembly); 28 | base.OnModelCreating(modelBuilder); 29 | } 30 | } 31 | } 32 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.EF.Mysql/MysqlOptions.cs: -------------------------------------------------------------------------------- 1 | namespace EFCoreEleganceUse.EF.Mysql 2 | { 3 | public class MysqlOptions 4 | { 5 | public string Version { get; set; } 6 | public string ConnectionString { get; set; } 7 | public string MigrationAssembly { get; set; } 8 | } 9 | } 10 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.EF.Mysql/Repository/GenericRepository.cs: -------------------------------------------------------------------------------- 1 | using EFCoreEleganceUse.Domain.Repository; 2 | using Microsoft.EntityFrameworkCore; 3 | using System.Linq.Expressions; 4 | 5 | namespace EFCoreEleganceUse.EF.Mysql.Repository 6 | { 7 | public class GenericRepository : IAsyncRepository where TEntity : class 8 | { 9 | protected readonly LibraryDbContext _dbContext; 10 | 11 | public GenericRepository(LibraryDbContext dbContext) 12 | { 13 | _dbContext = dbContext; 14 | } 15 | 16 | ~GenericRepository() 17 | { 18 | _dbContext?.Dispose(); 19 | } 20 | 21 | public virtual IQueryable All() 22 | { 23 | return All(null); 24 | } 25 | 26 | public virtual IQueryable All(string[] propertiesToInclude) 27 | { 28 | var query = _dbContext.Set().AsNoTracking(); 29 | 30 | if (propertiesToInclude != null) 31 | { 32 | foreach (var property in propertiesToInclude.Where(p => !string.IsNullOrWhiteSpace(p))) 33 | { 34 | query = query.Include(property); 35 | } 36 | } 37 | 38 | return query; 39 | } 40 | 41 | public virtual IQueryable Where(Expression> filter) 42 | { 43 | return Where(filter, null); 44 | } 45 | 46 | public virtual IQueryable Where(Expression> filter, string[] propertiesToInclude) 47 | { 48 | var query = _dbContext.Set().AsNoTracking(); 49 | 50 | if (filter != null) 51 | { 52 | query = query.Where(filter); 53 | } 54 | 55 | if (propertiesToInclude != null) 56 | { 57 | foreach (var property in propertiesToInclude.Where(p => !string.IsNullOrWhiteSpace(p))) 58 | { 59 | query = query.Include(property); 60 | } 61 | } 62 | 63 | return query; 64 | } 65 | } 66 | } 67 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.EF.Mysql/Repository/WorkUnit.cs: -------------------------------------------------------------------------------- 1 | using EFCoreEleganceUse.Domain.Repository; 2 | 3 | namespace EFCoreEleganceUse.EF.Mysql.Repository 4 | { 5 | public class WorkUnit : IWorkUnit, IDisposable 6 | { 7 | private readonly LibraryDbContext _dbContext; 8 | public WorkUnit(LibraryDbContext dbContext) 9 | { 10 | _dbContext = dbContext; 11 | } 12 | 13 | public async Task SaveAsync() 14 | { 15 | await _dbContext.SaveChangesAsync(); 16 | } 17 | 18 | protected virtual void Dispose(bool disposing) 19 | { 20 | if (!_disposed && disposing) 21 | { 22 | _dbContext.Dispose(); 23 | } 24 | 25 | _disposed = true; 26 | } 27 | 28 | public void Dispose() 29 | { 30 | Dispose(true); 31 | GC.SuppressFinalize(this); 32 | } 33 | 34 | private bool _disposed = false; 35 | ~WorkUnit() 36 | { 37 | Dispose(); 38 | } 39 | } 40 | } 41 | -------------------------------------------------------------------------------- /EFCoreEleganceUse.sln: -------------------------------------------------------------------------------- 1 |  2 | Microsoft Visual Studio Solution File, Format Version 12.00 3 | # Visual Studio Version 17 4 | VisualStudioVersion = 17.3.32929.385 5 | MinimumVisualStudioVersion = 10.0.40219.1 6 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EFCoreEleganceUse", "EFCoreEleganceUse\EFCoreEleganceUse.csproj", "{145105F5-B6EB-4E63-AC74-472AFF96F380}" 7 | EndProject 8 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EFCoreEleganceUse.Core", "EFCoreEleganceUse.Core\EFCoreEleganceUse.Core.csproj", "{CAC4C2C2-3754-437C-B6B8-77F4602C9825}" 9 | EndProject 10 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EFCoreEleganceUse.EF.Mysql", "EFCoreEleganceUse.EF.Mysql\EFCoreEleganceUse.EF.Mysql.csproj", "{19DE9EEE-C71E-4014-89D4-FB650FD5D1BB}" 11 | EndProject 12 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EFCoreEleganceUse.EF.Migrations", "EFCoreEleganceUse.EF.Migrations\EFCoreEleganceUse.EF.Migrations.csproj", "{9BA28812-DDD2-4FED-84B5-2B1FDB28E6CA}" 13 | EndProject 14 | Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "EFCoreEleganceUse.Domain", "EFCoreEleganceUse.Domain\EFCoreEleganceUse.Domain.csproj", "{A9065967-80A0-4CDA-9642-E489CCA7ECEA}" 15 | EndProject 16 | Global 17 | GlobalSection(SolutionConfigurationPlatforms) = preSolution 18 | Debug|Any CPU = Debug|Any CPU 19 | Release|Any CPU = Release|Any CPU 20 | EndGlobalSection 21 | GlobalSection(ProjectConfigurationPlatforms) = postSolution 22 | {145105F5-B6EB-4E63-AC74-472AFF96F380}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 23 | {145105F5-B6EB-4E63-AC74-472AFF96F380}.Debug|Any CPU.Build.0 = Debug|Any CPU 24 | {145105F5-B6EB-4E63-AC74-472AFF96F380}.Release|Any CPU.ActiveCfg = Release|Any CPU 25 | {145105F5-B6EB-4E63-AC74-472AFF96F380}.Release|Any CPU.Build.0 = Release|Any CPU 26 | {CAC4C2C2-3754-437C-B6B8-77F4602C9825}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 27 | {CAC4C2C2-3754-437C-B6B8-77F4602C9825}.Debug|Any CPU.Build.0 = Debug|Any CPU 28 | {CAC4C2C2-3754-437C-B6B8-77F4602C9825}.Release|Any CPU.ActiveCfg = Release|Any CPU 29 | {CAC4C2C2-3754-437C-B6B8-77F4602C9825}.Release|Any CPU.Build.0 = Release|Any CPU 30 | {19DE9EEE-C71E-4014-89D4-FB650FD5D1BB}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 31 | {19DE9EEE-C71E-4014-89D4-FB650FD5D1BB}.Debug|Any CPU.Build.0 = Debug|Any CPU 32 | {19DE9EEE-C71E-4014-89D4-FB650FD5D1BB}.Release|Any CPU.ActiveCfg = Release|Any CPU 33 | {19DE9EEE-C71E-4014-89D4-FB650FD5D1BB}.Release|Any CPU.Build.0 = Release|Any CPU 34 | {9BA28812-DDD2-4FED-84B5-2B1FDB28E6CA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 35 | {9BA28812-DDD2-4FED-84B5-2B1FDB28E6CA}.Debug|Any CPU.Build.0 = Debug|Any CPU 36 | {9BA28812-DDD2-4FED-84B5-2B1FDB28E6CA}.Release|Any CPU.ActiveCfg = Release|Any CPU 37 | {9BA28812-DDD2-4FED-84B5-2B1FDB28E6CA}.Release|Any CPU.Build.0 = Release|Any CPU 38 | {A9065967-80A0-4CDA-9642-E489CCA7ECEA}.Debug|Any CPU.ActiveCfg = Debug|Any CPU 39 | {A9065967-80A0-4CDA-9642-E489CCA7ECEA}.Debug|Any CPU.Build.0 = Debug|Any CPU 40 | {A9065967-80A0-4CDA-9642-E489CCA7ECEA}.Release|Any CPU.ActiveCfg = Release|Any CPU 41 | {A9065967-80A0-4CDA-9642-E489CCA7ECEA}.Release|Any CPU.Build.0 = Release|Any CPU 42 | EndGlobalSection 43 | GlobalSection(SolutionProperties) = preSolution 44 | HideSolutionNode = FALSE 45 | EndGlobalSection 46 | GlobalSection(ExtensibilityGlobals) = postSolution 47 | SolutionGuid = {145997F1-AD44-4B39-890F-68E0B936F6E0} 48 | EndGlobalSection 49 | EndGlobal 50 | -------------------------------------------------------------------------------- /EFCoreEleganceUse/EFCoreEleganceUse.csproj: -------------------------------------------------------------------------------- 1 |  2 | 3 | 4 | Exe 5 | net6.0 6 | enable 7 | enable 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | PreserveNewest 17 | 18 | 19 | 20 | 21 | 22 | 23 | 24 | 25 | 26 | all 27 | runtime; build; native; contentfiles; analyzers; buildtransitive 28 | 29 | 30 | 31 | 32 | 33 | -------------------------------------------------------------------------------- /EFCoreEleganceUse/Program.cs: -------------------------------------------------------------------------------- 1 | using Autofac; 2 | using Autofac.Extensions.DependencyInjection; 3 | using EFCoreEleganceUse.EF.Mysql; 4 | using Microsoft.AspNetCore.Builder; 5 | using Microsoft.EntityFrameworkCore; 6 | using Microsoft.Extensions.Configuration; 7 | using Microsoft.Extensions.DependencyInjection; 8 | using Microsoft.Extensions.Hosting; 9 | using Serilog; 10 | 11 | internal class Program 12 | { 13 | async static Task Main(string[] args) 14 | { 15 | Directory.SetCurrentDirectory(AppDomain.CurrentDomain.BaseDirectory); 16 | var host = CreateHostBuilder(args).Build(); 17 | host.UseSwagger(); 18 | host.UseSwaggerUI(); 19 | host.MapControllers(); 20 | host.UseAuthentication(); 21 | host.UseAuthorization(); 22 | 23 | await host.RunAsync(); 24 | } 25 | 26 | public static WebApplicationBuilder CreateHostBuilder(string[] args) 27 | { 28 | var hostBuilder = WebApplication.CreateBuilder(options:new WebApplicationOptions() 29 | { 30 | Args = args, 31 | EnvironmentName = Environments.Development 32 | }); 33 | hostBuilder.Host.UseSerilog((context, logger) =>//Serilog 34 | { 35 | string date = DateTime.Now.ToString("yyyy-MM-dd");//按时间创建文件夹 36 | logger.ReadFrom.Configuration(context.Configuration); 37 | logger.Enrich.FromLogContext(); 38 | logger.WriteTo.File($"Logs/{date}/", rollingInterval: RollingInterval.Hour);//按小时分日志文件 39 | }).UseServiceProviderFactory(new AutofacServiceProviderFactory()).UseEnvironment(Environments.Development); 40 | //生产下需要通过命令行参数或者配置文件设置环境：开发，测试，生产 41 | 42 | hostBuilder.Host.ConfigureServices((hostContext, services) => 43 | { 44 | //注入mysql，生产中应该放置在应用层 45 | var mysqlConfig = hostContext.Configuration.GetSection("Mysql").Get(); 46 | var serverVersion = new MariaDbServerVersion(new Version(mysqlConfig.Version)); 47 | services.AddDbContext(options => 48 | { 49 | options.UseMySql(mysqlConfig.ConnectionString, serverVersion, optionsBuilder => 50 | { 51 | optionsBuilder.MinBatchSize(4); 52 | optionsBuilder.CommandTimeout(10); 53 | optionsBuilder.MigrationsAssembly(mysqlConfig.MigrationAssembly); 54 | optionsBuilder.UseQuerySplittingBehavior(QuerySplittingBehavior.SplitQuery); 55 | }).UseQueryTrackingBehavior(QueryTrackingBehavior.NoTracking); 56 | 57 | if (hostContext.HostingEnvironment.IsDevelopment()) 58 | { 59 | options.EnableSensitiveDataLogging(); 60 | options.EnableDetailedErrors(); 61 | } 62 | }); 63 | services.AddControllers(); 64 | services.AddEndpointsApiExplorer(); 65 | services.AddSwaggerGen(); 66 | }); 67 | 68 | hostBuilder.Host.ConfigureContainer((hcontext, containerBuilder) => 69 | { 70 | //生产中由应用层聚合各种基础设置等模块，最后交由Host程序注册应用层模块 71 | containerBuilder.RegisterModule(); 72 | }); 73 | 74 | return hostBuilder; 75 | } 76 | } -------------------------------------------------------------------------------- /EFCoreEleganceUse/UsersController.cs: -------------------------------------------------------------------------------- 1 | using EFCoreEleganceUse.Domain.Entities; 2 | using EFCoreEleganceUse.Domain.Repository; 3 | using Microsoft.AspNetCore.Authorization; 4 | using Microsoft.AspNetCore.Mvc; 5 | using Microsoft.EntityFrameworkCore; 6 | using Microsoft.Extensions.Logging; 7 | 8 | namespace EFCoreEleganceUse 9 | { 10 | [ApiController] 11 | [Route("[controller]")] 12 | public class UsersController : ControllerBase 13 | { 14 | private readonly ILogger _logger; 15 | //生产中可以在应用层下创建service层,聚合各种实体仓储 16 | private readonly IAsyncRepository _userAsyncRepository; 17 | 18 | public UsersController(ILogger logger, IAsyncRepository userAsyncRepository) 19 | { 20 | _logger = logger; 21 | _userAsyncRepository = userAsyncRepository; 22 | } 23 | 24 | [HttpGet] 25 | [AllowAnonymous] 26 | public async Task Get() 27 | { 28 | return Ok(await _userAsyncRepository.All().ToListAsync()); 29 | } 30 | } 31 | } 32 | -------------------------------------------------------------------------------- /EFCoreEleganceUse/appsettings.Development.json: -------------------------------------------------------------------------------- 1 | { 2 | "Serilog": { 3 | "MinimumLevel": { 4 | "Default": "Information", 5 | "Override": { 6 | "Default": "Information", 7 | "System": "Information", 8 | "Microsoft": "Information" 9 | } 10 | }, 11 | "WriteTo": [ 12 | { "Name": "Console" }, 13 | { 14 | "Name": "Async", 15 | "Args": { 16 | "configure": [ 17 | { 18 | "Name": "File", 19 | "Args": { 20 | "outputTemplate": "Date:{Timestamp:yyyy-MM-dd HH:mm:ss.fff} LogLevel:{Level} Class:{SourceContext} Message:{Message}{Exception}{NewLine}", 21 | "rollingInterval": "4" 22 | } 23 | } 24 | ] 25 | } 26 | } 27 | ] 28 | }, 29 | "Mysql": { 30 | "ConnectionString": "Server=127.0.0.1;Port=3306;database=testlib;uid=root;pwd=sa12345;", 31 | "Version": "8.0.20", 32 | "MigrationAssembly": "EFCoreEleganceUse.EF.Migrations" 33 | } 34 | } -------------------------------------------------------------------------------- /README.md: -------------------------------------------------------------------------------- 1 | EFCore是微软官方的一款ORM框架，主要是用于实体和数据库对象之间的操作。功能非常强大，在老版本的时候叫做EF，后来.net core问世，EFCore也随之问世。 2 | 本文我们将用一个控制台项目Host一个web服务，并且使用本地Mysql作为数据库，使用EFCore的Code First模式进行数据操作。 3 | 4 | [toc] 5 | 6 | #### DBSet清除计划 7 | 以前使用EF/EFCore的开发者应该都记得，需要在DBContext里写好多DBSet，一个表对应一个DBSet，然后在其他地方操作这些DBSet对相关的表进行增删改查。作为一个开发，这些重复操作都是我们希望避免的，我们可以利用反射机制将这些类型通过框架自带的方法循环注册进去。 8 | 1.EF实体继承统一的接口，方便我们反射获取所有EF实体，接口可以设置一个泛型，来泛化我们的主键类型，因为可能存在不同的表的主键类型也不一样。 9 | 统一的EF实体接口 10 | ``` 11 | public interface IEFEntity 12 | { 13 | public TKey Id { get; set; } 14 | } 15 | ``` 16 | 统一的接口实现类 17 | ``` 18 | public abstract class AggregateRoot : IEFEntity 19 | { 20 | public TKey Id { get; set; } 21 | } 22 | ``` 23 | 用户实体类 24 | ``` 25 | public class User : AggregateRoot 26 | { 27 | public string UserName { get; set; } 28 | public DateTime Birthday { get; set; } 29 | public virtual ICollection Books { get; set; } 30 | } 31 | ``` 32 | 2.利用反射获取某个程序集下所有的实体类 33 | ``` 34 | public class EFEntityInfo 35 | { 36 | public (Assembly Assembly, IEnumerable Types) EFEntitiesInfo => (GetType().Assembly, GetEntityTypes(GetType().Assembly)); 37 | private IEnumerable GetEntityTypes(Assembly assembly) 38 | { 39 | //获取当前程序集下所有的实现了IEFEntity的实体类 40 | var efEntities = assembly.GetTypes().Where(m => m.FullName != null 41 | && Array.Exists(m.GetInterfaces(), t => t.IsGenericType && t.GetGenericTypeDefinition() == typeof(IEFEntity<>)) 42 | && !m.IsAbstract && !m.IsInterface).ToArray(); 43 | 44 | return efEntities; 45 | } 46 | } 47 | ``` 48 | 3.DBContext实现类中OnModelCreating方法中注册这些类型 49 | ``` 50 | protected override void OnModelCreating(ModelBuilder modelBuilder) 51 | { 52 | //循环实体类型，并且通过Entity方法注册类型 53 | foreach (var entityType in Types) 54 | { 55 | modelBuilder.Entity(entityType); 56 | } 57 | 58 | base.OnModelCreating(modelBuilder); 59 | } 60 | ``` 61 | 至此为止所有的实体类都被注册到DBContext中作为DBSets,再也不需要一个个写DBSet了，可以用过DbContext.Set<User>()获取用户的DBSet。 62 | #### IEntityTypeConfiguration(表配置) 63 | 用数据库创建过表的同学都知道，在设计表的时候，可以给表添加很多配置和约束，在Code First模式中，很多同学都是在对象中通过注解的方式配置字段。如下就配置了用户名是不能为NULL和最大长度为500 64 | ``` 65 | [Required] 66 | [MaxLength(500)] 67 | public string UserName { get; set; } 68 | ``` 69 | 也有的同学在DbContext中的OnModelCreating方法配置 70 | ``` 71 | modelBuilder.Entity().Property(x => x.UserName).IsRequired(); 72 | ``` 73 | 这两种方法，前者入侵行太强，直接代码耦合到实体类中了，后者不够清楚，把一大堆表的配置写在一个方法里，当然了很多人说可以拆分不同的方法或者使用注释分开。但是！不够优雅！ 74 | 我们可以使用IEntityTypeConfiguration接口实现我们所想的优雅的表配置。 75 | 1.创建一个配置基类，继承自IEntityTypeConfiguration，做一些通用的配置，比如设置主键，一般都是id啦，还有软删除等。 76 | ``` 77 | public abstract class EntityTypeConfiguration : IEntityTypeConfiguration 78 | where TEntity : AggregateRoot 79 | { 80 | public virtual void Configure(EntityTypeBuilder builder) 81 | { 82 | var entityType = typeof(TEntity); 83 | 84 | builder.HasKey(x => x.Id); 85 | 86 | if (typeof(ISoftDelete).IsAssignableFrom(entityType)) 87 | { 88 | builder.HasQueryFilter(d => EF.Property(d, "IsDeleted") == false); 89 | } 90 | } 91 | } 92 | ``` 93 | 2.创建用户实体/表独有的配置，比如设置用户名的最大长度，以及seed一些数据 94 | ``` 95 | public class UserConfig : EntityTypeConfiguration 96 | { 97 | public override void Configure(EntityTypeBuilder builder) 98 | { 99 | base.Configure(builder); 100 | 101 | builder.Property(x => x.UserName).HasMaxLength(50); 102 | //mock一条数据 103 | builder.HasData(new User() 104 | { 105 | Id = "090213204", 106 | UserName = "Bruce", 107 | Birthday = DateTime.Parse("1996-08-24") 108 | }); 109 | } 110 | } 111 | ``` 112 | 当然还有很多配置可以设置，比如索引，导航属性，唯一键等。如下图书实体 113 | ``` 114 | public class BookConfig : EntityTypeConfiguration 115 | { 116 | public override void Configure(EntityTypeBuilder builder) 117 | { 118 | base.Configure(builder); 119 | 120 | builder.Property(x => x.Id).ValueGeneratedOnAdd(); //设置book的id自增 121 | builder.Property(x => x.BookName).HasMaxLength(500).IsRequired(); 122 | builder.HasIndex(x => x.Author);//作者添加索引 123 | builder.HasIndex(x => x.SN).IsUnique();//序列号添加唯一索引 124 | builder.HasOne(r => r.User).WithMany(x=>x.Books) 125 | .HasForeignKey(r => r.UserId).IsRequired(false);//导航属性，本质就是创建外键，虽然查询很方便，生产中不建议使用！！！ 126 | } 127 | } 128 | ``` 129 | 3.DBContext中应用配置 130 | ``` 131 | protected override void OnModelCreating(ModelBuilder modelBuilder) 132 | { 133 | modelBuilder.HasCharSet("utf8mb4 "); 134 | var (Assembly, Types) = _efEntitysInfo.EFEntitiesInfo; 135 | foreach (var entityType in Types) 136 | { 137 | modelBuilder.Entity(entityType); 138 | } 139 | //只需要将配置类所在的程序集给到，它会自动加载 140 | modelBuilder.ApplyConfigurationsFromAssembly(Assembly); 141 | base.OnModelCreating(modelBuilder); 142 | } 143 | ``` 144 | #### Repository(仓储) 145 | 这个不过分介绍，特别是基于http的微服务中基本都有这个。 146 | 1.创建一个仓储基类，对于不同的实体，创建一样的增删改查方法。 147 | 简单写几个查询的方法定义。 148 | ``` 149 | public interface IAsyncRepository where TEntity : class 150 | { 151 | IQueryable All(); 152 | IQueryable All(string[] propertiesToInclude); 153 | IQueryable Where(Expression> filter); 154 | IQueryable Where(Expression> filter, string[] propertiesToInclude); 155 | } 156 | ``` 157 | 2.创建仓储实现类，将DBContext注入到构造中 158 | ``` 159 | public class GenericRepository : IAsyncRepository where TEntity : class 160 | { 161 | protected readonly LibraryDbContext _dbContext; 162 | 163 | public GenericRepository(LibraryDbContext dbContext) 164 | { 165 | _dbContext = dbContext; 166 | } 167 | 168 | ~GenericRepository() 169 | { 170 | _dbContext?.Dispose(); 171 | } 172 | 173 | public virtual IQueryable All() 174 | { 175 | return All(null); 176 | } 177 | public virtual IQueryable All(string[] propertiesToInclude) 178 | { 179 | var query = _dbContext.Set().AsNoTracking(); 180 | 181 | if (propertiesToInclude != null) 182 | { 183 | foreach (var property in propertiesToInclude.Where(p => !string.IsNullOrWhiteSpace(p))) 184 | { 185 | query = query.Include(property); 186 | } 187 | } 188 | 189 | return query; 190 | } 191 | } 192 | ``` 193 | #### Autofac 194 | 1.注入DBContext到Repository的构造方法中，并且注入Repository 195 | ``` 196 | public class EFCoreEleganceUseEFCoreModule : Module 197 | { 198 | protected override void Load(ContainerBuilder builder) 199 | { 200 | base.Load(builder); 201 | 202 | builder.RegisterModule(); //注入domain模块 203 | builder.RegisterGeneric(typeof(GenericRepository<,>))//将dbcontext注入到仓储的构造中 204 | .UsingConstructor(typeof(LibraryDbContext)) 205 | .AsImplementedInterfaces() 206 | .InstancePerDependency(); 207 | 208 | builder.RegisterType().As().InstancePerDependency(); 209 | } 210 | } 211 | ``` 212 | 2.Domain注入EFEntityInfo 213 | ``` 214 | public class EFCoreEleganceUseDomainModule : Module 215 | { 216 | protected override void Load(ContainerBuilder builder) 217 | { 218 | builder.RegisterType().SingleInstance(); 219 | } 220 | } 221 | ``` 222 | #### 数据库配置 223 | 1.注入DBContext，从配置文件读取数据库配置，然后根据开发/生产环境做一些特殊处理 224 | ``` 225 | var mysqlConfig = hostContext.Configuration.GetSection("Mysql").Get(); 226 | var serverVersion = new MariaDbServerVersion(new Version(mysqlConfig.Version)); 227 | services.AddDbContext(options => 228 | { 229 | options.UseMySql(mysqlConfig.ConnectionString, serverVersion, optionsBuilder => 230 | { 231 | optionsBuilder.MinBatchSize(4); 232 | optionsBuilder.CommandTimeout(10); 233 | optionsBuilder.MigrationsAssembly(mysqlConfig.MigrationAssembly);//迁移文件所在的程序集 234 | optionsBuilder.UseQuerySplittingBehavior(QuerySplittingBehavior.SplitQuery); 235 | }).UseQueryTrackingBehavior(QueryTrackingBehavior.NoTracking); 236 | 237 | //开发环境可以打开日志记录和显示详细的错误 238 | if (hostContext.HostingEnvironment.IsDevelopment()) 239 | { 240 | options.EnableSensitiveDataLogging(); 241 | options.EnableDetailedErrors(); 242 | } 243 | }); 244 | ``` 245 | #### 项目架构和源码 246 | ![](https://img2023.cnblogs.com/blog/1306612/202211/1306612-20221128142557976-287155572.png) 247 | 248 | 项目只是一个demo架构，并不适用于生产，主程序是一个控制台项目，只需要引用相关的包和模块，就可以启动一个web host. 249 | 250 | 全部代码已经全部上传到github:https://github.com/BruceQiu1996/EFCoreDemo 251 | 该项目是一个可以启动运行的基于.net6的控制台项目，启动后会启动一个web host和一个swagger页面。 --------------------------------------------------------------------------------