Global Filters

The IFreeSql base layer implements global filter functionality for Select/Update/Delete, which appends these settings to the SQL WHERE clauses executed.

public static AsyncLocal<int> TenantId { get; set; } = new AsyncLocal<int>();

fsql.GlobalFilter
    .Apply<ITenant>("test1", a => a.TenantId == TenantId.Value)
    .Apply<AuthorTest>("test2", a => a.Name == "11")

    .ApplyOnly<AuthorTest>("test3", a => a.Name == "11")
    // ApplyOnly sets filters for a specific type only

    .ApplyIf<TestAddEnum>("test4", () => TenantId.Value != 0, a => a.Id == TenantId.Value);
    // ApplyIf filters apply only if the delegate's return value (second parameter) is true

    .Apply<ITenant>("test5", a => a.TenantId == TenantId.Value, before: true)
    // v3.2.700 added before to place the condition at the beginning of the WHERE clause

The Apply generic parameter can be set to any type, and filtering will be attempted when using Select/Update/Delete methods:

• For successful matches, additional WHERE conditions will be appended.
• For failed matches, the type will be marked to prevent future matches, avoiding performance loss.

ApplyOnly specifies that the filter should only apply to a particular type.

How to Disable?

fsql.Select<TestAddEnum>().ToList(); // All filters applied
fsql.Select<TestAddEnum>().DisableGlobalFilter("test1").ToList(); // Disable filter "test1"
fsql.Select<TestAddEnum>().DisableGlobalFilter().ToList(); // Disable all filters

The fsql.Update/Delete methods behave similarly.

Tenant Fields (Dynamic Values)

Please refer to the documentation: 【Multi-Tenancy - Distinguish by Tenant Field】