Asp.Net core Swashbuckle set operationId

Question

How can I set swagger operationId attribute in Asp.Net Core 2.1 project? According to this post I should use SwaggerOperationAttribute but I cannot

Answer 1

Finally, I came to this solution:

public class SwaggerOperationNameFilter : IOperationFilter
{
    public void Apply(Operation operation, OperationFilterContext context)
    {
        operation.OperationId = context.MethodInfo.DeclaringType.GetCustomAttributes(true)
            .Union(context.MethodInfo.GetCustomAttributes(true))
            .OfType()
            .Select(a => a.OperationId)
            .FirstOrDefault();
    }
}

[AttributeUsage(AttributeTargets.Method)]
public sealed class SwaggerOperationAttribute : Attribute
{
    public SwaggerOperationAttribute(string operationId)
    {
        OperationId = operationId;
    }

    public string OperationId { get; }
}

// Startup.cs
services.AddSwaggerGen(c =>
{
    ...
    c.OperationFilter();
};

[HttpGet("{id:int}")]
[SwaggerOperation("GetById")]
public async Task Get(int id)
{
    ...
}

But it still seems to me that I've reinvented the wheel.