object reference not set to an instance of an object

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Amr Younis 13 posts 94 karma points

Oct 18, 2016 @ 17:26

Hi Tim

i'm sorry for late i post you this error before but i found the problem but i cannot solved enter image description here

this code below is the reason when register dependencies

        var builder = new ContainerBuilder();
        builder.RegisterControllers(Assembly.GetExecutingAssembly());
        builder.RegisterApiControllers(typeof(UmbracoApplication).Assembly);
        builder.RegisterType<Ta2healDbContext>().As<IUnitOfWork>().InstancePerReques();
        builder.RegisterType<SubjectService>().As<ISubjectService>().InstancePerLifetimeScope();
        builder.RegisterType<SectionService>().As<ISectionService>().InstancePerLifetimeScope();
        builder.RegisterType<LessonService>().As<ILessonService>().InstancePerLifetimeScope();

        // Set the dependency resolver to be Autofac.
        var container = builder.Build();
        var resolver = new AutofacWebApiDependencyResolver(container);
        GlobalConfiguration.Configuration.DependencyResolver = resolver;
        DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

and this when i stop some code of register dependencies

enter image description here

it's work when i do this into register dependencies code

       var builder = new ContainerBuilder();
        builder.RegisterControllers(Assembly.GetExecutingAssembly());
        builder.RegisterApiControllers(typeof(UmbracoApplication).Assembly);
        builder.RegisterType<Ta2healDbContext>().As<IUnitOfWork>().InstancePerRequest();

        builder.RegisterType<SubjectService>().As<ISubjectService>().InstancePerLifetimeScope();
        builder.RegisterType<SectionService>().As<ISectionService>().InstancePerLifetimeScope();
        builder.RegisterType<LessonService>().As<ILessonService>().InstancePerLifetimeScope();
        // Set the dependency resolver to be Autofac.
        //var container = builder.Build();
        //var resolver = new AutofacWebApiDependencyResolver(container);
        //GlobalConfiguration.Configuration.DependencyResolver = resolver;
        //DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

but code that i stopped make some problem to me so i ask you if you have any idea what can i do to solve this problem?

thanks Amr

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DonZalmrol 220 posts 833 karma points

Oct 18, 2016 @ 17:58

0

Hi Amr,

I am having the same issue as you. Did you did an upgrade as well from V7.4.x to V7.5?

Cheers,

Laurens

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Amr Younis 13 posts 94 karma points

Oct 18, 2016 @ 18:18

0

Hi Laurens,

about the version i already run V7.5x

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DonZalmrol 220 posts 833 karma points

Oct 18, 2016 @ 18:01

0

Seems it's working for me again.

I did a rebuild index & optimize index from the developer backend -> examine management.

Perhaps this could help you as well?

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Comment author was deleted

Oct 18, 2016 @ 18:20

Hmm not sure, haven 't used it in combo Autofac, if you send project and db to tim at nibble dot be I can give a go at debugging...

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Comment author was deleted

Oct 18, 2016 @ 18:32

And it also happens with other packages I see, https://our.umbraco.org/forum/developing-packages/80623-object-reference-not-set-to-an-instance-of-an-object

So not sure the error has to do with UI-O-Matic in that case

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Comment author was deleted

Oct 18, 2016 @ 18:35

Have you followed docs for using IOC https://our.umbraco.org/documentation/reference/using-ioc ?

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Comment author was deleted

Oct 31, 2016 @ 15:39

Ok seems this is due to autofac, you'll need to registed the UI-O-Matic tree controller, for details check the known issues doc, btw you'll need to do this for every third party tree

http://uiomatic.readthedocs.io/en/stable/13.KnowIssues/

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Amr Younis 13 posts 94 karma points

Nov 06, 2016 @ 08:43

HI Tim

Thank you i did this and it's work correctly

var builder = new ContainerBuilder();

        //register all controllers found in this assembly
        builder.RegisterControllers(Assembly.GetExecutingAssembly());
        builder.RegisterApiControllers(typeof(UmbracoApplication).Assembly);

        //add custom class to the container as Transient instance
        builder.RegisterType<Ta2healDbContext>().As<IUnitOfWork>().InstancePerRequest();
        builder.RegisterType<SubjectService>().As<ISubjectService>().InstancePerLifetimeScope();
        builder.RegisterType<SectionService>().As<ISectionService>().InstancePerLifetimeScope();
        builder.RegisterType<LessonService>().As<ILessonService>().InstancePerLifetimeScope();
        //register UIOMatic
        builder.RegisterApiControllers(typeof(UIOMatic.Trees.UIOMaticTreeController).Assembly);
        //register uContactor
        builder.RegisterApiControllers(typeof(uContactorApiController).Assembly);


        var container = builder.Build();
        DependencyResolver.SetResolver(new AutofacDependencyResolver(container));

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Comment author was deleted

Nov 06, 2016 @ 09:11

Awesome, thanks for confirming the fix!

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