- #2836
Part 1: Use existing property values when recursing in `MutableObjectModelBinder`
- remove `ComplexModelDTO` because that indirection made fixing this issue more difficult and doesn't add value
- started with an old closed PR (#2241) which did some of this work
- correct `MutableObjectModelBinderTest` tests that exercised behaviour that can't occur
- the old `dto.Results` dictionary was never incomplete; nor could it contain `null` values
Part 2: Change `MutableObjectModelBinder` to pass complex property values into binding system
- model binding no longer trounces nodes in the model tree that aren't bound
- create model instances less often in `TryUpdateModel` scenarios
- refactor `EnsureModel()` to `GetModel()` and use appropriately
- reorder logic in `SetProperty()` and `AddToProperty()` to avoid copying to / from the same collection
- also cleans up some code duplication
nits:
- clean up `MutableObjectModelBinderTest`
- fix odd line wrappings and indentation
- use `nameof()` more
- use `string.Empty` more
- simplify a couple of `Returns()` expressions
- make assertions in `TryUpdateModelIntegrationTest` more readable
- no need to work through `ModelStateDictionary.Keys`
- also use `Length` instead of `Count()`; test code but we don't need Linq at all in that test class
- #2907
- return `null` if `Filter()` finds no matching value provider in collection
- fix lack of defensiveness in model binders' use of `IBindingSourceValueProvider` implementations
- remove test workaround for unusual `CompositeValueProvider` behaviour
- cleanup duplicate code now that #2445 is fixed
- update unit tests using old `ModelBindingContext` setups
- fix (just) one integration test where `MutableObjectModelBinder` incorrectly calculated
`isTopLevelObject` and returned a non-`null` model
- undo temporary changes in `BodyModelBinderTests` due to increased reliance on incorrect
`isTopLevelObject` in #2445 fix
nits:
- combine tests that are now duplicates
- beef up coverage of some `MutableObjectModelBinderTest` cases
- remove unused `using`s
- only use MVC error message when `[BindRequired]` is violated
- update that error message to more clearly describe the problem
- enable all tests skipped due to dupe bug #2493
- update expectations of a few tests using the old messages
nits:
- rename `ModelBinding_MissingRequiredMember` to `ModelBinding_MissingBindRequiredMember`
- remove `<param>` description of removed `requiredValidator` parameter
- remove unused `MutableObjectModelBinderTest.GetRequiredValidator()`
with MVC5.
This change removes the behavior in model binding to validate values 'on
the wire' for requiredness instead of the looking at the model. This
restores the behavior of [Required] for model binding to the MVC5
semantics.
This part of the change removes default value support from ModelBinding.
Updated some unit tests to verify that it does nothing in that case.
Deleted a functional test as it was pure duplication of another
(supported) case where the property has a pre-initialized value.
Doug Bunting
Mugdha Kulkarni
Ryan Nowak
Harsh Gupta
Pranav K
N. Taylor Mullen