ABP框架入门学习【进阶】（七）——作者模块应用层

一、创建IAuthorAppService接口

TestApp.BookStore.Application.Contracts>Authors新建接口命名为IAuthorAppService并继承IApplicationService，脚本如下：

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using System;
using System.Collections.Generic;
using System.Text;
using System.Threading.Tasks;
using Volo.Abp.Application.Dtos;
using Volo.Abp.Application.Services;

namespace TestApp.BookStore.Authors
{
    public interface IAuthorAppService : IApplicationService
    {
        Task<AuthorDto> GetAsync(Guid id);
        Task<PagedAndSortedResultRequestDto> GetListAsync(GetAuthorListDto input);
        Task<AuthorDto> CreateAsync(CreateAuthorDto input);
        Task UpdateAsync(Guid id, UpdateAuthorDto input);
        Task DeleteAsync(Guid id);
    }
}
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  • IApplicationService 是一个常规接口, 所有应用服务都继承自它, 所以 ABP 框架可以识别它们.
  • 在 Author 实体中定义标准方法用于CRUD操作.
  • PagedResultDto 是一个ABP框架中预定义的 DTO 类. 它拥有一个 Items 集合 和一个 TotalCount 属性, 用于返回分页结果.
AuthorDto类：
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using System;
using System.Collections.Generic;
using System.Text;
using Volo.Abp.Application.Dtos;

namespace TestApp.BookStore.Authors
{
    public class AuthorDto : EntityDto<Guid>
    {
        public string Name { get; set; }

        public DateTime BirthDate { get; set; }

        public string ShortBio { get; set; }
    }
}

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  • EntityDto<T> 只有一个类型为指定泛型参数的 Id 属性. 你可以自己创建 Id 属性, 而不是继承自 EntityDto<T>.
GetAuthorListDto类：
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using System;
using System.Collections.Generic;
using System.Text;
using Volo.Abp.Application.Dtos;

namespace TestApp.BookStore.Authors
{
    public class GetAuthorListDto : PagedAndSortedResultRequestDto
    {
        public string Filter { get; set; }
    }
}
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  • Filter 用于搜索作者. 它可以是 null (或空字符串) 以获得所有用户.
  • PagedAndSortedResultRequestDto 具有标准分页和排序属性: int MaxResultCount, int SkipCount 和 string Sorting.


CreateAuthorDto 类：


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using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Text;

namespace TestApp.BookStore.Authors
{
    public class CreateAuthorDto
    {
        [Required]
        [StringLength(AuthorConsts.MaxNameLength)]
        public string Name { get; set; }

        [Required]
        public DateTime BirthDate { get; set; }

        public string ShortBio { get; set; }
    }
}


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UpdateAuthorDto 类：




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using System;
using System.Collections.Generic;
using System.Text;
using Volo.Abp.Application.Dtos;
using System.ComponentModel.DataAnnotations;

namespace TestApp.BookStore.Authors
{
    public class UpdateAuthorDto
    {
        [Required]
        [StringLength(AuthorConsts.MaxNameLength)]
        public string Name { get; set; }

        [Required]
        public DateTime BirthDate { get; set; }

        public string ShortBio { get; set; }
    }
}


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二、创建AuthorAppService类实现IAuthorAppService接口




    

  • 由 BookStoreAppService 派生, 这个类是一个简单基类, 可以做为模板. 它继承自标准的 ApplicationService 类.
    • 

  • 实现上面定义的 IAuthorAppService .
    • 

  • 注入 IAuthorRepository 和 AuthorManager 以使用服务方法.·
    • 



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using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using TestApp.BookStore.Permissions;
using Microsoft.AspNetCore.Authorization;
using Volo.Abp.Application.Dtos;
using Volo.Abp.Domain.Repositories;

namespace TestApp.BookStore.Authors
{
    [Authorize(BookStorePermissions.Authors.Default)]
    public class AuthorAppService : BookStoreAppService, IAuthorAppService
    {
        private readonly IAuthorRepository _authorRepository;
        private readonly AuthorManager _authorManager;

        public AuthorAppService(
            IAuthorRepository authorRepository,
            AuthorManager authorManager)
        {
            _authorRepository = authorRepository;
            _authorManager = authorManager;
        }

        [Authorize(BookStorePermissions.Authors.Create)]
        public async Task<AuthorDto> CreateAsync(CreateAuthorDto input)
        {
            var author = await _authorManager.CreateAsync(
                input.Name,
                input.BirthDate,
                input.ShortBio
            );

            await _authorRepository.InsertAsync(author);

            return ObjectMapper.Map<Author, AuthorDto>(author);
        }

        [Authorize(BookStorePermissions.Authors.Delete)]

        public async Task DeleteAsync(Guid id)
        {
            await _authorRepository.DeleteAsync(id);
        }


        public async Task<AuthorDto> GetAsync(Guid id)
        {
            var author = await _authorRepository.GetAsync(id);
            return ObjectMapper.Map<Author, AuthorDto>(author);
        }

        public async Task<PagedResultDto<AuthorDto>> GetListAsync(GetAuthorListDto input)
        {
            if (input.Sorting.IsNullOrWhiteSpace())
            {
                input.Sorting = nameof(Author.Name);
            }

            var authors = await _authorRepository.GetListAsync(
                input.SkipCount,
                input.MaxResultCount,
                input.Sorting,
                input.Filter
            );

            var totalCount = input.Filter == null
                ? await _authorRepository.CountAsync()
                : await _authorRepository.CountAsync(
                    author => author.Name.Contains(input.Filter));

            return new PagedResultDto<AuthorDto>(
                totalCount,
                ObjectMapper.Map<List<Author>, List<AuthorDto>>(authors)
            );
        }
        [Authorize(BookStorePermissions.Authors.Edit)]

        public async Task UpdateAsync(Guid id, UpdateAuthorDto input)
        {
            var author = await _authorRepository.GetAsync(id);

            if (author.Name != input.Name)
            {
                await _authorManager.ChangeNameAsync(author, input.Name);
            }
            author.BirthDate = input.BirthDate;
            author.ShortBio = input.ShortBio;

            await _authorRepository.UpdateAsync(author);
        }
    }
}


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其中会用Authorize授权，可参照之前Book授权修改：


打开  TestApp.BookStore.Application.Contracts 项目中的 BookStorePermissions 类 (在 Permissions 文件夹中), 添加为如下代码:




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  public static class Authors
    {
        public const string Default = GroupName + ".Authors";
        public const string Create = Default + ".Create";
        public const string Edit = Default + ".Edit";
        public const string Delete = Default + ".Delete";
    }


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打开  TestApp.BookStore.Application.Contracts 项目中的BookStorePermissionDefinitionProvider类 (在 Permissions 文件夹中), 添加为如下代码:


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        var authorsPermission = myGroup.AddPermission(
            BookStorePermissions.Authors.Default, L("Permission:Authors"));
        authorsPermission.AddChild(
            BookStorePermissions.Authors.Create, L("Permission:Authors.Create"));
        authorsPermission.AddChild(
            BookStorePermissions.Authors.Edit, L("Permission:Authors.Edit"));
        authorsPermission.AddChild(
            BookStorePermissions.Authors.Delete, L("Permission:Authors.Delete"));


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打开  TestApp.BookStore.Domain.Shared 项目中的 Localization/BookStore/en.json 加入以下项, 用以本地化权限名称:






    "Permission:Authors": "Author Management",
    "Permission:Authors.Create": "Creating new authors",
    "Permission:Authors.Edit": "Editing the authors",
    "Permission:Authors.Delete": "Deleting the authors








 


对象映射配置


AuthorAppService 使用 ObjectMapper 将 Author 对象 转换为 AuthorDto 对象. 所以, 我们需要在 AutoMapper 配置中定义映射.


打开  TestApp.BookStore.Application 项目中的 BookStoreApplicationAutoMapperProfile 类, 修改为：


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using AutoMapper;
using TestApp.BookStore.Authors;
using TestApp.BookStore.Books;

namespace TestApp.BookStore;

public class BookStoreApplicationAutoMapperProfile : Profile
{
    public BookStoreApplicationAutoMapperProfile()
    {
        /* You can configure your AutoMapper mapping configuration here.
         * Alternatively, you can split your mapping configurations
         * into multiple profile classes for a better organization. */
        CreateMap<Book, BookDto>();
        CreateMap<CreateUpdateBookDto, Book>();

        CreateMap<Author, AuthorDto>();

    }
}


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三、“作者”数据种子初始化


打开  TestApp.BookStore.Domain 项目中的 BookStoreDataSeederContributor, 修改文件内容如下:


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using System;
using System.Threading.Tasks;
using TestApp.BookStore.Authors;
using TestApp.BookStore.Books;
using Volo.Abp.Data;
using Volo.Abp.DependencyInjection;
using Volo.Abp.Domain.Repositories;

namespace TestApp.BookStore
{
    public  class BookStoreDataSeederContributor
      : IDataSeedContributor, ITransientDependency
    {
        private readonly IRepository<Book, Guid> _bookRepository;
        private readonly IAuthorRepository _authorRepository;
        private readonly AuthorManager _authorManager;

        public BookStoreDataSeederContributor(IRepository<Book, Guid> bookRepository,
            IAuthorRepository authorRepository,
            AuthorManager authorManager)
        {
            _bookRepository = bookRepository;
            _authorRepository = authorRepository;
            _authorManager = authorManager;
        }

        public async Task SeedAsync(DataSeedContext context)
        {
            // ADDED SEED DATA FOR BOOKS

            if (await _bookRepository.GetCountAsync() <= 0)
            {
                await _bookRepository.InsertAsync(
                    new Book
                    {
                        Name = "1984",
                        Type = BookType.Dystopia,
                        PublishDate = new DateTime(1949, 6, 8),
                        Price = 19.84f
                    },
                    autoSave: true
                );

                await _bookRepository.InsertAsync(
                    new Book
                    {
                        Name = "The Hitchhiker's Guide to the Galaxy",
                        Type = BookType.ScienceFiction,
                        PublishDate = new DateTime(1995, 9, 27),
                        Price = 42.0f
                    },
                    autoSave: true
                );
            }

            // ADDED SEED DATA FOR AUTHORS

            if (await _authorRepository.GetCountAsync() <= 0)
            {
                await _authorRepository.InsertAsync(
                    await _authorManager.CreateAsync(
                        "George Orwell",
                        new DateTime(1903, 06, 25),
                        "Orwell produced literary criticism and poetry, fiction and polemical journalism; and is best known for the allegorical novella Animal Farm (1945) and the dystopian novel Nineteen Eighty-Four (1949)."
                    )
                );

                await _authorRepository.InsertAsync(
                    await _authorManager.CreateAsync(
                        "Douglas Adams",
                        new DateTime(1952, 03, 11),
                        "Douglas Adams was an English author, screenwriter, essayist, humorist, satirist and dramatist. Adams was an advocate for environmentalism and conservation, a lover of fast cars, technological innovation and the Apple Macintosh, and a self-proclaimed 'radical atheist'."
                    )
                );
            }
        }
    }
}


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由于数据表结构和初始化数据调整，所以需要更新下数据库，将TestApp.BookStore.DbMigrator应用程序设为启动项目，来更新数据库，运行完成会发现数据库AppAuthor表会多两条默认数据，如下图：




 


 


















		

		
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