怎样优雅地增删查改（三）：业务用户的增删查改

创建业务用户
创建业务用户同步器
创建业务用户应用服务
- 增
- 删
- 改
- 查
创建控制器
测试
- 按组织架构查询
- 按职称查询

创建业务用户

区别于身份管理模块（Identity模块）的鉴权用户IdentityUser，业务用户（BusinessUser）是围绕业务系统中“用户”这一定义的领域模型。如：在一个医院系统中，业务用户可以是医生、护士、患者；在一个OA系统中，业务用户可以是员工、管理员、客户等。

业务用户和鉴权用户由同步机制关联，业务用户通过分布式事件（DistributedEvent）的同步器（Synchronizer）与鉴权用户关联同步。

在Health业务模块中，定义两种业务用户：

Client: 客户；

Employee: 员工。

这些业务用户继承自HealthUser，HealthUser是业务用户的基类，包含了业务用户的基本信息，如姓名，性别，出生日期，身份证号等。并且需要实现IUpdateUserData接口，以便在同步鉴权用户信息时，更新业务用户的基本信息。

Employee包含工号，职称，简介等信息。其领域模型定义如下：

public class Employee : HealthUser<Guid>, IUser, IUpdateUserData
{
    [StringLength(12)]
    public string EmployeeNumber { get; set; }

    [StringLength(64)]
    public string EmployeeTitle { get; set; }

    public string Introduction { get; set; }

    ...
}

Client包含客户号，身高，体重，婚姻状况等信息。其领域模型定义如下：

public class Client : HealthUser<Guid>, IUser, IUpdateUserData
{

    //unique

    [StringLength(12)]
    public string ClientNumber { get; set; }

    public string ClientNumberType { get; set; }

    [Range(0.0, 250.0)]
    public double? Height { get; set; }


    [Range(0.0, 1000.0)]
    public double? Weight { get; set; }

    public string Marriage { get; set; }

    public string Status { get; set; }
}

创建业务用户同步器

以Client为例，ClientLookupService是业务用户的查询服务，其基类UserLookupService定义了关联用户的查询接口，包括按ID查询，按用户名查询，按组织架构查询，按户关系查询等。

创建ClientLookupService，代码如下

public class ClientLookupService : UserLookupService<Client, IClientRepository>, IClientLookupService
{
    public ClientLookupService(
        IClientRepository userRepository,
        IUnitOfWorkManager unitOfWorkManager)
        : base(
            userRepository,
            unitOfWorkManager)
    {

    }

    protected override Client CreateUser(IUserData externalUser)
    {
        return new Client(externalUser);
    }
}

同步器订阅了分布式事件EntityUpdatedEto，当鉴权用户更新时，同步器将更新业务用户的基本信息。

创建ClientSynchronizer，代码如下

public class ClientSynchronizer :
        IDistributedEventHandler<EntityUpdatedEto<UserEto>>,
    ITransientDependency
{
    protected IClientRepository UserRepository { get; }
    protected IClientLookupService UserLookupService { get; }

    public ClientSynchronizer(
        IClientRepository userRepository,
        IClientLookupService userLookupService)
    {
        UserRepository = userRepository;
        UserLookupService = userLookupService;
    }

    public async Task HandleEventAsync(EntityUpdatedEto<UserEto> eventData)
    {
        var user = await UserRepository.FindAsync(eventData.Entity.Id);
        if (user != null)
        {
            if (user.Update(eventData.Entity))
            {
                await UserRepository.UpdateAsync(user);
            }
        }
    }
}

创建业务用户应用服务

以Employee为例

在应用层中创建EmployeeAppService，在这里我们实现对业务用户的增删改查操作。

EmployeeAppService继承自CrudAppService，它是ABP框架提供的增删改查的基类，其基类定义了增删改查的接口，包括GetAsync，GetListAsync，CreateAsync，UpdateAsync，DeleteAsync等。

OrganizationUnit为业务用户的查询接口的按组织架构查询提供查询依据。OrganizationUnitAppService注入到EmployeeAppService中。

public class EmployeeAppService : CrudAppService<Employee, EmployeeDto, Guid, GetAllEmployeeInput, CreateEmployeeInput>, IEmployeeAppService
{
    private readonly IOrganizationUnitAppService organizationUnitAppService;

}

增

创建CreateWithUserAsync方法，用于创建业务用户。

public async Task<EmployeeDto> CreateWithUserAsync(CreateEmployeeWithUserInput input)
{

    var createdUser = await identityUserAppService.CreateAsync(input);
    await CurrentUnitOfWork.SaveChangesAsync();
    var currentEmployee = await userLookupService.FindByIdAsync(createdUser.Id);
    ObjectMapper.Map(input, currentEmployee);
    var updatedEmployee = await Repository.UpdateAsync(currentEmployee);
    var result = ObjectMapper.Map<Employee, EmployeeDto>(updatedEmployee);

    if (input.OrganizationUnitId.HasValue)
    {
        await organizationUnitAppService.AddToOrganizationUnitAsync(
            new UserToOrganizationUnitInput()
            { UserId = createdUser.Id, OrganizationUnitId = input.OrganizationUnitId.Value });
    }
    return result;
}

删

删除接口由CrudAppService提供默认实现，无需重写。

改

创建UpdateWithUserAsync方法，用于更新业务用户。

public async Task<EmployeeDto> UpdateWithUserAsync(CreateEmployeeInput input)
{

    var currentEmployee = await userLookupService.FindByIdAsync(input.Id);
    if (currentEmployee == null)
    {
        throw new UserFriendlyException("没有找到对应的用户");
    }
    ObjectMapper.Map(input, currentEmployee);
    var updatedEmployee = await Repository.UpdateAsync(currentEmployee);
    var result = ObjectMapper.Map<Employee, EmployeeDto>(updatedEmployee);

    return result;
}

查

查询单个实体接口由CrudAppService提供默认实现，无需重写。

查询集合：

以Employee为例，查询接口所需要的入参为：

OrganizationUnitId：按组织架构查询用户
IsWithoutOrganization：查询不属于任何组织架构的用户
EmployeeTitle：按职称查询用户

创建GetAllEmployeeInput，代码如下

public class GetAllEmployeeInput : PagedAndSortedResultRequestDto
{
    public string EmployeeTitle { get; set; }

    public Guid? OrganizationUnitId { get; set; }
    public bool IsWithoutOrganization { get; set; }

}

重写CreateFilteredQueryAsync


protected override async Task<IQueryable<Employee>> CreateFilteredQueryAsync(GetAllEmployeeInput input)
{
    var query = await ReadOnlyRepository.GetQueryableAsync().ConfigureAwait(continueOnCapturedContext: false);

    if (input.OrganizationUnitId.HasValue && !input.IsWithoutOrganization)
    {
        var organizationUnitUsers = await organizationUnitAppService.GetOrganizationUnitUsersAsync(new GetOrganizationUnitUsersInput()
        {
            Id = input.OrganizationUnitId.Value
        });
        if (organizationUnitUsers.Count() > 0)
        {
            var ids = organizationUnitUsers.Select(c => c.Id);
            query = query.Where(t => ids.Contains(t.Id));
        }
        else
        {
            query = query.Where(c => false);
        }
    }
    else if (input.IsWithoutOrganization)
    {
        var organizationUnitUsers = await organizationUnitAppService.GetUsersWithoutOrganizationAsync(new GetUserWithoutOrganizationInput());
        if (organizationUnitUsers.Count() > 0)
        {
            var ids = organizationUnitUsers.Select(c => c.Id);
            query = query.Where(t => ids.Contains(t.Id));
        }
        else
        {
            query = query.Where(c => false);
        }
    }
    query = query.WhereIf(!string.IsNullOrEmpty(input.EmployeeTitle), c => c.EmployeeTitle == input.EmployeeTitle);
    return query;
}

至此，我们已完成了对业务用户的增删改查功能实现。

创建控制器

在HttpApi项目中创建EmployeeController，代码如下：

[Area(HealthRemoteServiceConsts.ModuleName)]
[RemoteService(Name = HealthRemoteServiceConsts.RemoteServiceName)]
[Route("api/Health/employee")]
public class EmployeeController : AbpControllerBase, IEmployeeAppService
{
    private readonly IEmployeeAppService _employeeAppService;

    public EmployeeController(IEmployeeAppService employeeAppService)
    {
        _employeeAppService = employeeAppService;
    }

    [HttpPost]
    [Route("CreateWithUser")]

    public Task<EmployeeDto> CreateWithUserAsync(CreateEmployeeWithUserInput input)
    {
        return _employeeAppService.CreateWithUserAsync(input);
    }

    [HttpDelete]
    [Route("Delete")]
    public Task DeleteAsync(Guid id)
    {
        return _employeeAppService.DeleteAsync(id);
    }

    [HttpPut]
    [Route("UpdateWithUser")]

    public Task<EmployeeDto> UpdateWithUserAsync(CreateEmployeeInput input)
    {
        return _employeeAppService.UpdateWithUserAsync(input);
    }

    [HttpGet]
    [Route("Get")]
    public Task<EmployeeDto> GetAsync(Guid id)
    {
        return _employeeAppService.GetAsync(id);
    }

    [HttpGet]
    [Route("GetAll")]
    public Task<PagedResultDto<EmployeeDto>> GetAllAsync(GetAllEmployeeInput input)
    {
        return _employeeAppService.GetAllAsync(input);
    }
}