How deeply does ASP.NET Core in Action, 3e cover IdentityDbContext?

Explains inheritance, Identity entities, schema changes, and migrations, but stops short of direct table interaction.

IdentityDbContext

As explained in ASP.NET Core in Action, 3e

IdentityDbContext<TUser> is an Entity Framework Core database context base class that maps ASP.NET Core Identity data for a specified user type.

IdentityDbContext<TUser> is an Entity Framework Core database-context base class for storing ASP.NET Core Identity accounts. An application context inherits from it and supplies a user type derived from IdentityUser. section 23.3.3 section 23.4.2

Add Identity to an application context

Define an ApplicationUser type, then inherit from IdentityDbContext<ApplicationUser>. Existing application entities, such as Recipe, can remain in the same context. This adds Identity entities to EF Core’s model; create and apply a migration to create the corresponding database schema. section 23.4.2

Listing 23.5 Updating AppDbContext to use IdentityDbContext

public class AppDbContext : IdentityDbContext<ApplicationUser>    #1
{
    public AppDbContext(DbContextOptions<AppDbContext> options)   #2
        : base(options)                                           #2
    { }                                                           #2
 
    public DbSet<Recipe> Recipes { get; set; }                    #2
}
#1 Updates to inherit from the Identity context instead of directly from DbContext
#2 The remainder of the class remains the same.

Shows the compact ApplicationDbContext declaration, including the generic Identity context, constructor, and existing application DbSet. section 23.4.2

The inherited context supplies Identity’s persistence model, including:

User profiles stored in AspNetUsers. section 23.3.3
Claims, external-login data, and tokens associated with users. section 23.3.3
Migration history through the standard EF Core migrations table. section 23.3.3

How ASP.NET Core in Action, 3e covers it

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Related concepts

Entity Framework Coreuses · Entity Framework Core is a cross-platform object-relational mapping framework for .NET that enables applications to query and persist data through .NET objects and APIs.
dbcontextkind of · DbContext is the Entity Framework Core class that coordinates database access, entity querying and change tracking, and persistence for an application’s data model.
IdentityUseruses · IdentityUser is the built-in ASP.NET Core Identity entity type representing an application user account and its core properties.
ASP.NET Core Identityuses · ASP.NET Core Identity is an extensible ASP.NET Core membership system for managing user accounts, credentials, claims, roles, authentication, and related identity data.
data modelconfigures · A data model is a structured representation of data that defines its entities, attributes, relationships, and applicable constraints.

This explainer was generated by Manning's knowledge graph from the text of ASP.NET Core in Action, 3e. The section links point to the parts of the book it draws on.