OptionsValidatorGenerator does not generate a Validate method

[koenigst]

Description

When a class is marked with the OptionsValidatorAttribute implements IValidatableObject the OptionsValidatorGenerator does not generate a Validate method if no properties are marked with validation attributes.

Reproduction Steps

using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using Microsoft.Extensions.Options;

[OptionsValidator]
public partial class SampleOptions : IValidateOptions<SampleOptions>, IValidatableObject
{
    public IEnumerable<ValidationResult> Validate(ValidationContext context)
    {
        return new[] { new ValidationResult($"Display: {context.DisplayName}, Member: {context.MemberName}") };
    }
}

Expected behavior

The generator generates a Validate method calling the IValidatableObject.Validate method.

Actual behavior

The sample does not compile due to the missing Validate method.

Regression?

No response

Known Workarounds

No response

Configuration

• .NET SDK: 8.0.100
• OS: Windows 11
• Arch: x64
• Microsoft.Extensions.Options: 8.0.0

Other information

No response

[ghost]

Tagging subscribers to this area: @dotnet/area-system-componentmodel-dataannotations See info in area-owners.md if you want to be subscribed.

Issue Details

---

### Description When a class is marked with the `OptionsValidatorAttribute` implements `IValidatableObject` the `OptionsValidatorGenerator` does not generate a `Validate` method if no properties are marked with validation attributes. ### Reproduction Steps ```csharp using System.Collections.Generic; using System.ComponentModel.DataAnnotations; using Microsoft.Extensions.Options; [OptionsValidator] public partial class SampleOptions : IValidateOptions, IValidatableObject { public IEnumerable Validate(ValidationContext context) { return new[] { new ValidationResult($"Display: {context.DisplayName}, Member: {context.MemberName}") }; } } ``` ### Expected behavior The generator generates a `Validate` method calling the `IValidatableObject.Validate` method. ### Actual behavior The sample does not compile due to the missing `Validate` method. ### Regression? _No response_ ### Known Workarounds _No response_ ### Configuration * .NET SDK: 8.0.100 * OS: Windows 11 * Arch: x64 * `Microsoft.Extensions.Options`: 8.0.0 ### Other information _No response_

Author:	koenigst
Assignees:	-
Labels:	`area-System.ComponentModel.DataAnnotations`
Milestone:	-

[ghost]

Tagging subscribers to this area: @dotnet/area-extensions-options See info in area-owners.md if you want to be subscribed.

Issue Details

---

### Description When a class is marked with the `OptionsValidatorAttribute` implements `IValidatableObject` the `OptionsValidatorGenerator` does not generate a `Validate` method if no properties are marked with validation attributes. ### Reproduction Steps ```csharp using System.Collections.Generic; using System.ComponentModel.DataAnnotations; using Microsoft.Extensions.Options; [OptionsValidator] public partial class SampleOptions : IValidateOptions, IValidatableObject { public IEnumerable Validate(ValidationContext context) { return new[] { new ValidationResult($"Display: {context.DisplayName}, Member: {context.MemberName}") }; } } ``` ### Expected behavior The generator generates a `Validate` method calling the `IValidatableObject.Validate` method. ### Actual behavior The sample does not compile due to the missing `Validate` method. ### Regression? _No response_ ### Known Workarounds _No response_ ### Configuration * .NET SDK: 8.0.100 * OS: Windows 11 * Arch: x64 * `Microsoft.Extensions.Options`: 8.0.0 ### Other information _No response_

Author:	koenigst
Assignees:	-
Labels:	`area-Extensions-Options`, `in-pr`, `source-generator`
Milestone:	9.0.0