Include
Include is an Entity Framework Core query extension method that specifies related navigation properties to load with queried entities.
Pro ASP.NET Core 7, Tenth Edition
An Entity Framework Core query method that specifies a related navigation property to load with an entity.
- How it is used
- Loads navigation properties needed by repository queries and ASP.NET Core API responses.
- How deep it goes
- Explains relationship traversal and nested ThenInclude usage, then diagnoses circular serialization without detailing generated SQL.
- Examples
- Uses order lines with products and suppliers with products as concrete related-data query examples.
- What you can do after
- Apply it via Entity Framework Core to retrieve related entities and diagnose object-cycle failures in serialized API responses.
Read how Pro ASP.NET Core 7, Tenth Edition explains Include →
.NET in Action, Second Edition
Include is an Entity Framework Core query extension method that specifies related entities to load with the queried entities.
- How it is used
- Loads related entities alongside queried entities when a returned object needs its relationships populated.
- How deep it goes
- Explains separate Includes, eager-versus-lazy loading, and alternative loading approaches without detailing query translation internals.
- Examples
- Demonstrates loading Book entities with their Ratings collection and printing the results to the console.
- What you can do after
- Apply it via Entity Framework Core to retrieve books together with their ratings in one eager-loading query.
Related concepts
- under-fetchingaddresses · Under-fetching is an API response problem in which insufficient data requires additional requests to obtain the information a consumer needs.
- Entity Framework Coreused by · 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.
- navigation propertyuses · A navigation property is an ORM-mapped entity property that represents an association with a related entity or collection of entities.
- eager loadingused by · Eager loading is a data-loading strategy that retrieves required data before it is requested individually, often fetching related data together with its primary entity.
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