[Mgmt Generator] BuildGetChildResourceMethods does not pass path parameters for nested child resources

[haiyuazhang]

Bug Description

ResourceClientProvider.BuildGetChildResourceMethods() generates collection getter and Get/GetAsync methods for child resources on a parent resource class. When child resources have extra path parameters between the parent and child resource (e.g., nestedResourceTypeFirst), these parameters are:

1. Not passed to the collection constructor in the getter method body (line 480)
2. Not included in the Get/GetAsync method signatures (line 504-510)
3. Not forwarded when calling the collection getter from Get/GetAsync methods (line 515)

Impact

This affects any ARM resource with nested children that have intermediate path segments. For example, ProviderHub has:

• ResourceTypeRegistration (parent)
  • NestedResourceTypeFirstSku (child, needs nestedResourceTypeFirst path param)
  • NestedResourceTypeSecondSku (child, needs nestedResourceTypeFirst + nestedResourceTypeSecond)
  • NestedResourceTypeThirdSku (child, needs 3 path params)

The generated accessor methods either compile with errors or are suppressed via CodeGenSuppress.

Root Cause

File: ResourceClientProvider.cs in Azure.Generator.Management

Collection getter (line 480):
\\csharp
// Only passes client and Id, ignores path parameters from signature
New.Instance(childResource.ResourceCollection.Type, client, thisResource.Id())
\\

Get method signature (line 504-510): Only includes collectionSignature.Parameters (e.g., sku, cancellationToken) but not the path parameters from the collection getter's signature.

Get method body (line 515): Calls thisResource.Invoke(signature.Name) without passing path parameter arguments.

Fix

See PR linked to this issue.