This change undoes a breaking change introduced by the 2.1 model
validation changes. Now an implementation of IValidableObject on a
top-level model will be called correctly with the 'empty' prefix instead
of the parameter name.
When fixing this we undid a workaround for another issue.
When validating a parameter that didn't bind we didn't correctly compute
the model name for 'fallback to empty prefix' cases.
- #7413 part 2 of 2
- add `ModelMetadata.Name` and `ParameterName`
- use `Name` instead of `PropertyName` in most cases
- update `ModelMetadata.ContainerType` and other property use
- choose using `MetadataKind` almost everywhere; support all possibilties
- usually parameter metadata was possible but not handled
- worst case was one or two potential NREs, especially `ContainerType.*` dereferences
- improve `MvcCoreLoggerExtensions` metadata handling
- add three new debug messages, one for type metadata and two for parameter metadata
- update `ModelMetadata.ContainerMetadata`, `ContainerType` and `PropertyName` doc comments
- no changes needed in Microsoft.AspNetCore.Mvc.ViewFeatures because parameters aren't viewed
nits:
- add missing `TestModelMetadataProvider.ForParameter(...)` method
- remove unused `EmptyModelMetadataProvider` instances in `ModelMetadataTest`
- refactor `ModelValidationResultComparer` out of DataAnnotationsModelValidatorTest`
- take VS suggestions, mostly related to variable inlining and object initializers
- #7413 part 1 of 2
- made all `ModelMetadataProvider` and `ObjectModelValidator`-specific code conditional
- fortunately, `MvcOptions` easy to get; affected code is primarily `internal` or pub-`Internal`
- remove unnecessary `ModelMetadataProvider` use in `ApiBehaviorApplicationModelProvider`
- run integration and functional tests with `CompatibilityVersion.Version_2_1`
- functional test change depends on @javiercn's recent #7541 fix
- remove test code now redundantly turning compatibility switches on
nits:
- correct spelling errors in `CompatibilitySwitch`
- take VS suggestions, mostly in test code
- rename methods in `ControllerBinderDelegateProviderTest` to match current API
- slightly refactor in `ApiBehaviorApplicationModelProvider`