What does AddEntityFrameworkStores exactly do in AddIdentity?

user_929902 0
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I recently needed to Generate Email Confirmation Token for my .net core 5 app, and while researching I found out I need to register "AddIdentity" at startup.

services.AddIdentity<AuthenticatedUser, IdentityRole>(options =>
            {
                options.User.RequireUniqueEmail = false;
            }).
            AddEntityFrameworkStores<SchoolDataContext>().
            AddDefaultTokenProviders();

If I remove 'AddEntityFrameworkStores' piece, then application builds and starts but crashes at runtime with similar errors like in following:

Error:

System.AggregateException: 'Some services are not able to be constructed (Error while validating the service descriptor 'ServiceType: Microsoft.AspNetCore.Identity.IUserClaimsPrincipalFactory1[WebApp1.Areas.Identity.Data.ApplicationUser] Lifetime: Scoped ImplementationType: WebApp1.Areas.Identity.Data.AdditionalUserClaimsPrincipalFactory': Unable to resolve service for type 'Microsoft.AspNetCore.Identity.UserManager1[WebApp1.Areas.Identity.Data.ApplicationUser]' while attempting to activate 'WebApp1.Areas.Identity.Data.AdditionalUserClaimsPrincipalFactory'.)'

My question is why we even need to register "AddEntityFrameworkStores", I could not found a good documentation or source code implementation of it. Can't we just avoid to use it, or any idea why we need it at first place?

asp.net-identity c#
1 Answers

Here's the source code.

Basically it adds default Stores: UserStore and RoleStore. If you don't use it you have to provide Stores yourself with AddUserStore and AddRoleStore.

user_73138910
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