My Fundamental Dumbnosity -- Attach/Detach etc.. Context Problem

[gayes...@gmail.com]

I was getting an "other context..." when updating a class that had list<> values -- ie -- UserProfile contains UserProfileImages...I no longer get the error by implementing  ((BrightstarEntityObject)myobject).Attach(ctx, true); // added this to get rid of the 

but it does not save the UserProfile with the added image? I appreciate the read transaction through update but that isn't so important to the application. So basically the reads aren't bundled with the writes.

I have wrapped the functions (business logic) associated with each "entity" in the associated partial class. 

I have an update which  calls CtxAdddUpdateSave() {

using (var ctx = PreLoad.getBrightStar)

            {

                ((BrightstarEntityObject)myobject).Attach(ctx, true); // added this to get rid of the out of context to go away...

                try

                {                

                    ctx.AddOrUpdate(myobject);

                    ctx.SaveChanges();

//((BrightstarEntityObject)myobject).Detach();

-- If I add a Detach() here it wipes out the content of myobject except for the key field? Is that what it's supposed to do?

                }

                catch (Exception ee)

                {

...

}

If I have nested saves where for example:

UserProfileImage upi = new UserProfileImage();

upi.name = "fred";

upi.updateinsert();

where UserProfileImage updateinsert() {

if (this.UserProfileImageOID == null) {

SetKey()...

  CtxAddUpdateSave(this);

UserProfile up = UserProfile.Fetch(upi.UserOID); -- this must be the other context? 

up.AddImage(upi);

up.updateinsert();

UserProfile updateinsert() {

this.CtxAddUpdateSave(); --- I used to get an error "other context..." 

}

No it works fine but doesn't attach the image to the UserProfile -- the catch on CtxAddUpdateSave is never hit...

where UserProfile ...

...

     ICollection<IUserProfileImage> lstUserProfileImage { get; set; }

...

public void AddImage(UserProfileImage upi) {

 if (!hasImage(upi)) then lst...add(upi); 

 this.updateinsert()..

Not understanding this -- Since I cleared and reattached the context to the current ctx using by the CtxAdddUpdateSave -- why doesn't it save the UserProfile with the lstImage item added? It is there before the ctx.AddOrUpdate(myobject); is applied?

I am using (using ctx...) everywhere ... This is a web application. Is a better option to create one ctx at the beginRequest time (once per request) and use a single ctx for read/write activity? I have fetches and creates that create the entity.

[k...@networkedplanet.com]

Hi,

It sounds like you have quite a tricky attach/detach scenario here and it is possible that you may be hitting a bug or that you are doing something wrong but I can't quite follow what's going on in your app. I think what you suggest at the end is a better way to go for a web app. Typically when I use B* in a web app (I usually use MVC or Nancy) I will create the context in the scope of the controller. If you aren't using MVC, then creating the context at beginRequest time should also work.

Please can I ask you to post any follow-up questions to http://brightstardb.codeplex.com/discussions - as we no longer use this forum due to admin issues.

Cheers

Kal