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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.