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So, when we last left off,
we had created these create and

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instances class methods and

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then extended the classes with them when
our inventoriable module was included.

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00:00:13,840 --> 00:00:19,200
So now, let's go ahead and
I have included the inventoriable module

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in the pant class and the accessory class.

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So, now lets go ahead and
create some stock counts to work with.

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So, we’re gonna actually create some
items and I’m just gonna paste this in.

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So, we’re gonna sell some Mike
the Frog shirts, some jeans, and

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some belts, and a necklace.

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00:00:42,640 --> 00:00:45,220
Now one thing that
you'll notice right here

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is that the necklace does not
have a size associated with it.

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That's gonna come into play very,
very shortly.

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So what we're going to do
is we wanna create a report

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of everything that is currently in stock.

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And we wanna do that at the class level.

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So we would say shirt dot in stock report,
and

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we want that to return a list of
everything that we have in stock.

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Now since it's going to be a class method,

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we're going to put it inside
of our class methods module.

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Now, let's just go ahead and
call this in_stock_report.

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So first we'll print to the screen the
name of the class that we're working with

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which we can just do by typing self.to_s,
in stock report.

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Now what we wanna do is select
every instance that is in stock.

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So, we already have this in stock method,

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wouldn't it be great if we could
just say instances.select,

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instance, and then say it's in stock.

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That would be great, but somehow we
have to get a numerable in here.

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Well, we can do that the same way
that we extended the class methods.

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We can also extend it with enumerable.

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So, when our inventoriable module
gets included at the class level,

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we get all of these class methods and
the enumerable module.

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Since we're getting the enumerable model,

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that means we need to
define our own each method.

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And let's go ahead and
look back at our enumerable work and

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see what we did in that one.

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We just defined a method called each,
grabbed the block,

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and passed it into the players object.

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Well we can do the same thing here,
and just pass it in to the instances.

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So now, whatever it is, if it's shirts,

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we'll just be running
this against the shirts.

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If it's pants, same thing, and
same thing with accessories.

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So we'll just say we're reporting on
these things, so these are reportable,

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and now all we have to
do is print them out.

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We've gone through and selected them, so

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we know we've got the ones
that are in stock.

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And, what we'll do is
something kind of interesting.

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We're just gonna iterate through them and
we're gonna create

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an array of what we wanna report on and
then print that array out.

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But, what we wanna do is, also remember
how the size wasn't necessarily in here?

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We're gonna put a little
if statement there.

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This will make a lot more
sense in just a moment.

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We'll say align is an empty array,
and we will push the item name here,

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and we have to grab the attributes for
the name.

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And we will also say stock
is the item's stock count

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Now remember how not every single item has
a size, like this necklace right here?

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We’re not gonna print that out, if
the item doesn’t have the size attribute.

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So, we’ll say if the item attributes,
which is just a hash,

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include the size then we can print it out.

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And now we can just print out the line and
we'll separate it with a tab character.

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And then we'll end this
whole thing with a new line.

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Actually we need to
interpolate that string.

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Okay.

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So now let's go ahead and call this and
we'll do an in stock report for

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our shirts.

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And let's just see what happens.

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I'm going to make this
a little bit bigger.

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Uh-oh.

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Syntax error, expecting keyword_end.

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Now when that happens, it usually
means that we forgot an end somewhere.

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So let's go ahead and
see if we can figure that out.

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All right, it looks like we needed
a little if statement here.

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Let me clear the screen and
run that again.

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Okay.

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And that worked just
like we expected it to.

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We have an In Stock Report for our shirts.

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So let's go ahead and
do the same thing for pants, and

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for our accessories as well.

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I'm gonna clear my screen and
run this again.

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Make this a little bit bigger so
that we can see.

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Clear one more time.

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Okay, we have our Shirt In Stock Report,
our Pant In Stock Report,

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and our Accessory In Stock Report.

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And you'll notice for our necklace item,
this does not list the size,

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which is exactly what we wanted.

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In our next video, we're going to
clean this up just a little bit.