Multi-Tenant shared data. #10425

2 Answer(s)

• 

  0

  AI-Bot created 4 days ago

  Support Team ABP Agent

  • Option A (Recommended): Model “common to all tenants” as Host data

    1. Create the shared entities/tables without IMultiTenant (no TenantId column). These are naturally readable by everyone because they are not tenant-filtered.

    2. For tables that need both tenant-specific rows and global rows, implement IMultiTenant and store shared rows with TenantId = null.

    3. When querying from the tenant side, explicitly include both:

       • rows with TenantId == CurrentTenantId
       • rows with TenantId == null (global/shared)

       Example (repository or EF Core query):

  var tenantId = CurrentTenant.Id;
  
       var items = await _repo.GetQueryableAsync();
       var result = await items
           .Where(x => x.TenantId == tenantId || x.TenantId == null)
           .ToListAsync();
  

   Notes:
   - ABP’s automatic multi-tenancy filter for `IMultiTenant` typically returns only the current tenant’s rows. So for this “tenant + global” scenario, you should **control the predicate yourself** (as above), or use a separate read model/service dedicated to this query pattern.
  

  • Option B (More complex): “Shared across some tenants (not all)”

    • This requirement violates strict multi-tenancy isolation (ABP team explicitly calls out that if tenants must see other tenants’ data, it’s not a pure multi-tenant model).

    • Practical approach in ABP is to model “sharing” explicitly, e.g.:

      1. Keep the record as a host/global record (no TenantId or TenantId = null)
      2. Add a join table like EntityTenantShare(EntityId, TenantId) that defines which tenants can see it
      3. Query with a join / subquery for the current tenant.

      Conceptual example:

  var tenantId = CurrentTenant.Id;
  
       var query = from e in await _entityRepo.GetQueryableAsync()
                   join s in await _shareRepo.GetQueryableAsync() on e.Id equals s.EntityId into shares
                   from share in shares.DefaultIfEmpty()
                   where e.TenantId == tenantId
                         || (e.TenantId == null && share.TenantId == tenantId)
                   select e;
  

  • If you find many tables needing this, consider whether you actually want multi-tenancy in ABP terms, or a “single-tenant app with a Company/Group filter” using ABP Data Filtering (custom filters).

  • When you need “not all tables”

    • ABP already supports this naturally: only entities implementing IMultiTenant are tenant-filtered. Others are shared.

  Links (verified):

  • https://abp.io/docs/latest/framework/architecture/multi-tenancy
  • https://abp.io/docs/latest/framework/infrastructure/data-filtering
  • https://abp.io/community/articles/hpwn44r3
  • https://abp.io/community/articles/51nvl4u9

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• 

  0

  maliming created 2 days ago

  Support Team Fullstack Developer

  hi

  You can create a multi-tenant entity. By default, each tenant can only see their own data. If you need to access other tenants' data, you can disable the multi-tenant filter.

  https://abp.io/docs/latest/framework/infrastructure/data-filtering?_redirected=B8ABF606AA1BDF5C629883DF1061649A#idatafilter-service-enabledisable-data-filters

  Thanks.

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