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Now that we've installed and configured our DI container, let's update our controller's action methods to call the appropriate entries repository methods.
Follow Along
To follow along committing your changes to this course, you'll need to fork the aspnet-fitness-frog-spa repo. Then you can clone, commit, and push your changes to your fork like this:
git clone <your-fork>
cd aspnet-fitness-frog-spa
git checkout tags/v3.2 -b calling-our-repository-methods
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Now that we've installed and configured our DI container, let's update our
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controllers actions methods to call the appropriate EntriesRepository methods.
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In the first Get action method, let's return a call,
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To the entriesRepository.GetList method.
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And in the second Get action method, let's return a call to
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the entriesRepository.Get method, passing in the id parameter.
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In the Post action method,
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we need to call the entriesRepository method to add the entry.
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And in the Put action method,
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we need to call the entriesRepository method to update the entry.
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And lastly, in the Delete action method,
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we need to call the entriesRepository method to delete the entry.
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Set break points in the constructor in the first Get action method, and
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press F5 to start debugging.
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Using Postman, let's make a Get request
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against the api/entries endpoint.
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Here we are in the constructor for our API controller.
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If we look in the Call Stack window, we can see that the Call Stack includes
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a call to the SimpleInjectorWebApiInitializer.Initialize
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method.
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This is our controller being instantiated
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as part of the DI container's verification process.
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Press F5 to continue execution.
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And we're in the controller constructor again.
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This time,
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our controller is being substantiated to handle the current request.
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If we hover over the entriesRepository parameter,
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we can see that we've been passed a reference to an instance which in
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turn has a reference to a context class instance.
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Looks like our DI container is up and running.
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Press F5 to continue execution.
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And here we are in the Get action method,
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about to make a call to the entriesRepository.GetList method.
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Go ahead and continue execution.
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And we get an exception.
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Right here is the exception message.
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Self referencing loop detected with type 'Treehouse.FitnessFrog.Shared.Models.En-
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try' Path '[0] .Activity.Entries'.
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Looks like we've encountered an issue with serializing our data to JSON.
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Next up, let's take a closer look at why this error's occurring, and
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how we can configure the JsonSerializer to prevent it.
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