在 ASP.NET Core 中实施 OrganizationUnit 过滤器

Question

在 ASP.NET 样板中，有内置的数据过滤器，如租户过滤器，我们可以使用 SetTenantId 来启用查询特定 tenantId.

根据官方文档，它不支持 EF Core 中的自定义 Filter，这与 EF 6.x 不同。

我想知道如何为 OrganizationUnitId 参数实现类似的过滤器。

这是我到目前为止所做的：

覆盖 CreateFilterExpression:

protected override Expression<Func<TEntity, bool>> CreateFilterExpression<TEntity>()
{
    Expression<Func<TEntity, bool>> expression = null;
    if (typeof(IMayHaveOrganizationUnit).IsAssignableFrom(typeof(TEntity)))
    {
        Expression<Func<TEntity, bool>> mayHaveOUFilter = e => ((IMayHaveOrganizationUnit)e).OrganizationUnitId == CurrentOrganizationUnitId || (((IMayHaveOrganizationUnit)e).OrganizationUnitId == CurrentOrganizationUnitId) == IsMayHaveOrganizationUnitFilterEnabled;
        expression = expression == null ? mayHaveOUFilter : CombineExpressions(expression, mayHaveOUFilter);
    }

    expression = expression == null ? base.CreateFilterExpression<TEntity>() : CombineExpressions(expression, base.CreateFilterExpression<TEntity>());

    return expression;
}

我通过下面的代码注册了新的过滤器：

Configuration.UnitOfWork.RegisterFilter("MayHaveOrganizationUnit", true);

但是，我该如何实现设置 OrganizationUnitId 的代码？

SetTenantId用于配置tenantId，我如何配置OrganizationUnitId从UnitOfWork？

我尝试继承 ClaimsAbpSession 如下所示：

public class CustomAbpSession : ClaimsAbpSession, ICustomAbpSession
{
    private readonly IRepository<User, long> _userRepository;

    public CustomAbpSession(
        IRepository<User, long> userRepository,
        IPrincipalAccessor principalAccessor,
        IMultiTenancyConfig multiTenancy,
        ITenantResolver tenantResolver,
        IAmbientScopeProvider<SessionOverride> sessionOverrideScopeProvider)
        : base(principalAccessor, multiTenancy, tenantResolver, sessionOverrideScopeProvider)
    {
        _userRepository = userRepository;
    }

    public virtual long? OrganizationUnitId
    {
        get
        {
            if (UserId != null)
            {
                var user = _userRepository.Get(UserId.Value);
                return 1;
            }

            return null;
        }
    }

    public long? ImpersonatorOrganizationUnitId => throw new NotImplementedException();
}

protected virtual long? GetCurrentOrganizationUnitIdOrNull()
{
    return 3; // ((ICustomAbpSession)AbpSession).OrganizationUnitId;
}

使用下面的代码注册自定义 IAbpSession:

Configuration.ReplaceService(typeof(IAbpSession), () =>
{
    IocManager.Register<IAbpSession, CustomAbpSession>(DependencyLifeStyle.Transient);
});

用法：

public List<Product> GetAll()
{
    using (CurrentUnitOfWork.SetFilterParameter("MayHaveOrganizationUnit", "OrganizationUnitId", 2))
    {
        return _productRepositry.GetAll().ToList();
    }
}

但是，CustomAbpSession 中 OrganizationUnitId 的值总是 return，此方法 CurrentUnitOfWork.SetFilterParameter 没有将值设置到过滤器中。

Answer 1

这不仅仅是几行代码。

从 IMayHaveTenant 在 CreateFilterExpression 中的过滤方式开始。

您可以在 DbContext 中覆盖 ShouldFilterEntity 和 CreateFilterExpression。

SetTenantId is used to configure the tenantId, how could I configure OrganizationUnitId from UnitOfWork?

您可以使用等效的 SetFilterParameter 方法。

But, it always return value from OrganizationUnitId in CustomAbpSession, this method CurrentUnitOfWork.SetFilterParameter did not set the value into filter.

从 CurrentUnitOfWorkProvider.Current，您可以访问 Filters：

protected virtual long? GetCurrentOrganizationUnitIdOrNull()
{
    if (CurrentUnitOfWorkProvider != null &&
        CurrentUnitOfWorkProvider.Current != null)
    {
        return CurrentUnitOfWorkProvider.Current
            .Filters.FirstOrDefault(f => f.FilterName == "MayHaveOrganizationUnit")?
            .FilterParameters["OrganizationUnitId"] as long?;
    }

    return ((ICustomAbpSession)AbpSession).OrganizationUnitId;
}

在 ASP.NET Core 中实施 OrganizationUnit 过滤器

Implement OrganizationUnit filter in ASP.NET Core

c#

asp.net-core

filter

aspnetboilerplate

ef-core-2.0