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Object does not get dependencies injected into it when it is mapped using toValue()

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peter.hall

22 Aug, 2013 05:30 PM

While creating a context, I have a line like this:

viewContext.injector.map( IUITrackingService ).toValue( tracking );

This works ok, and I get the instance correctly wherever I inject it. However, the object itself does not have dependencies injected. I assumed that the object would become managed if it was added to a mapping.

Any ideas how to get the injector to inject into that object? (injector.injectInto() can't be used directly here because the context isn't ready).

1. Support Staff 1 Posted by Shaun Smith on 22 Aug, 2013 05:39 PM

   

   Yeh, that's a troublesome one, as objects aren't really "managed" in RL/SwiftSuspenders, and we made a conscious decision not to inject into values provided to toValue().

   The easiest thing would probably be to create a config class and add it as the final config. Inject IUITrackingService and the injector into it, and call injectInto in the config method.

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2. 2 Posted by peter.hall on 23 Aug, 2013 12:56 PM

   

   Thanks, it works fine to add the mapping and do the injection after the context is initialized.

   But perhaps you can suggest a better approach for what I'm doing..

   There's a parent context that contains a factory, each child context needs it's own instance created by that factory, so that it can be injected with different objects.

   I know that the parent context will be available already, so I'm injecting the factory into the child's config, then using it to create an instance. Then I'm adding a mapping to the child, and - now - I'm using injectInto to perform injections there.

   Could you suggest a better approach using existing RB extensions?

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3. Ondina D.F. closed this discussion on 11 Oct, 2013 08:52 AM.