EfCoreExtensions.FindParent 1.0.3

.NET 5.0 This package targets .NET 5.0. The package is compatible with this framework or higher.
There is a newer version of this package available.
See the version list below for details. 
dotnet add package EfCoreExtensions.FindParent --version 1.0.3                

                    
                

            
NuGet\Install-Package EfCoreExtensions.FindParent -Version 1.0.3
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="EfCoreExtensions.FindParent" Version="1.0.3" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
paket add EfCoreExtensions.FindParent --version 1.0.3                

                    
                

            
#r "nuget: EfCoreExtensions.FindParent, 1.0.3"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
// Install EfCoreExtensions.FindParent as a Cake Addin
#addin nuget:?package=EfCoreExtensions.FindParent&version=1.0.3

// Install EfCoreExtensions.FindParent as a Cake Tool
#tool nuget:?package=EfCoreExtensions.FindParent&version=1.0.3

FindParent

IQueryable<TParent> FindParent<TChild, TParent>(this DbContext context, object childId)

An entity framework core extension method to find a parent entity any number of ancestors away. Traverses the db context model to find the optimal path, then dynamically generates a queryable of chained selects along the path. Example:

Say there is a table structure where Garages have multiple Cars, Cars have multiple Tires, and Tires have multiple Bolts. If you wanted to know the parent Garage of the Bolt with an Id of 1, you could get it via:

  Garage garageFromBolt = context.FindParent<Bolt, Garage>(1).FirstOrDefault();

The method uses Dijkstra’s shortest path algorithm to find the shortest path to the parent. (Meaning the translated SQL has the lowest number of expensive joins!)

Possible Exceptions

  1. If the child table has a composite key, will throw a NotSupportedException.
  2. If either the child or parent Types do not correspond to tables in the context model, will throw an ArgumentException.
  3. If the child id passed in is not assignable to the child class's primary key type, will throw an ArgumentException.
Product Compatible and additional computed target framework versions.
.NET net5.0 is compatible.  net5.0-windows was computed.  net6.0 was computed.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
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Version Downloads Last updated
2.0.0 314 2/4/2023
1.0.4 418 5/21/2022
1.0.3 430 5/21/2022
1.0.2 419 5/17/2022
1.0.1 399 5/17/2022
1.0.0 423 5/17/2022