Can i intercept the iqueryable ?

[lucas-garrido]

Hello !
i have encountered an issue with generated query: linq2db/linq2db#3148
i would like to know if it's possible to check how the iqueryable is built ?
thanks ☺

[PascalSenn]

You can use a middleware to intercept the queries

public class Query 
{
   [UseYourMiddleware]
   [UseFiltering]
   public IQueryable<Foo> GetFoos(...) => ...
}

    public class UseYourMiddlewareAttribute : ObjectFieldDescriptorAttribute
    {
        public override void OnConfigure(
            IDescriptorContext context,
            IObjectFieldDescriptor descriptor,
            MemberInfo member)
        {
            descriptor.Use(next => async context =>
            {
                await next(context);

                if (context.Result is IQueryable<Foo> q)
                {
                    // intercept the IQueryable in q
                }

            });
        }
    }