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Creating our relationships is
straight-forward.

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Since the relationship is a model we'll
just need to make a new instance.

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Let's go back to Workspaces and set up a
couple of views and

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the appropriate HTML links to handle this.

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Okay, so, let's see about building a
couple of views.

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One for following a user and one for
unfollowing a user.

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So, I'm gonna do these, let's scroll this
up here, I'm gonna do these to where we,

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we do a follow, and then, the user name.

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We could this with like, follow, and then,
a, an ID, if we wanted.

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I think the user name, though, makes a
nicer looking URL, and

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if you were doing this with say, a public
app instead of this one,

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where it's kind of inside of a company
kind of an intranet app.

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Then exposing the IDs could potentially
open you up to some security problems,

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but you'd weigh that with the rest of your
team and with your own needs.

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So we're gonna have this at
/follow/<username>.

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And then we're gonna wrap this with
login_required, and

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we're gonna say follow(username).

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And then so we need to do a try here.

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And the to_user is gonna be
models.User.get

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models.User.username is like username the,

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the double stars here is a case
insensitive search.

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So where the username is this username,
but it could be uppercase,

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lowercase, whatever.

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Except models.DoesNotExist.

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We need to do something, but for now,
let's just pass, and, and

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we'll just have it go on.

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Else, so the pass didn't happen.

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Then we're gonna try
models.Relationship.create.

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And the from_user is going to be our
g.user.

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And we have to get that current_object.

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Oops, forgot my comma.

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And the to_user is gonna be the user that
we looked up, up on line 120.

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So, the exception here would be

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a models.IntegrityError since we have the
uniqueness constraint on there.

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Then if we try to create another record
for the same,

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like, I tried to follow you twice, then it
would trigger this integrity error.

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If that happens, we're just gonna pass,
because, really, things are okay.

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And if that pass doesn't happen, then
we're gonna flash up a message,

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we're gonna say You're now following, and
then we'll put in a name.

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And let's use to_user.username.

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We could use the username that comes in to
the URL, but they might have typed it

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slightly different, so let's use the
actual username.

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And we're gonna send that back with a
success category.

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Let me get back over here.

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And we want to do return redirect url_for
stream and

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the username is going to be the username,
again,

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we should probably do to_user.username
just to be safe.

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Alright, so, pull this down a little bit
so we can see the whole function.

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So, we're doing this /follow/<username>
login_required, and

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then, we're gonna try and find the user.

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If that user doesn't exist we'll, we'll do
something with this later.

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If the user does exist,

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then we're gonna create this relationship
and, then we're gonna flash up a message.

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So, let's actually take this whole thing
and copy it and then paste it.

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And let's change this one to unfollow,
unfollow.

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Okay.

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We still want to get the user, but instead
of calling create we want to do get.

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And then we want to call the
delete_instance.

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And so what we're, what we're doing here
is, we're calling this get.

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We're getting the same relationship that
we had before.

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But now we're gonna delete it, when it
comes up.

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And let's say You've unfollowed.

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And then we'll put in the username and we
still leave it a success,

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because they successfully did the thing
that they wanted to do.

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Alright, so those are our two views.

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So let's go add a couple of things in to
our templates.

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And first of all let's go to the
user_stream template and

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here we have these followers and
following.

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Instead of the zeroes lets put in a couple
of counts.

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So we can say user.followers().count,

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and here, we can say
user.following().count.

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And I forgot my closing brackets right
there, or my closing braces, rather.

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And then, here, we need to put in a
follow/unfollow button.

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And so, let's do, if
current_user.is_authenticated,

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cuz we only want them to be able to do
this if they're logged in, all right.

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And then inside there, if user does not =
current_user.

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End that if.

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Then let's say, if not user in

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current_user.following, and end that if.

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All right, so let's look at what we've got
so far.

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So make sure they're logged in.

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We make sure that we're not looking at the
user that's logged in.

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And then we make sure that the user is not
already being followed by this user.

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Okay, so if all that's true [LAUGH] then
we need to print out an href

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url_for follow.

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And the username would be user.username.

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And we'll do a class on this of small, and
we'll say, follow.

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And really now we need an else.

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And we want almost this exact same thing.

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So I'm just gonna copy it again.

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And instead of follow, we want unfollow.

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And we want unfollow there as well.

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Okay.
And then,

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we're still gonna call our super, and
we're still gonna do our end block.

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So, that's all normal.

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And, let's go try this out.

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So, I'm gonna actually log out.

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And then, I'm gonna sign up.

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I'm gonna do a new one.

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I'm gonna say test user, test@example.com.

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And a password.

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I'm gonna register.

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Sweet, okay.

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So now I'm gonna go look at Kenneth Love.

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Oh.
Oh, that's right.

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I forgot to log in.

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So let's log in.

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And test@example.com.

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Password.

110
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Okay.
So now I'm logged in.

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So that says Hello testuser!

112
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So, here's Kenneth Love.

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He has no followers and nobody is
following, he's not following anybody.

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So let's go ahead and hit Follow.

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Look, our follower count went up.

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And the unfollow, the following is still
empty.

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So now I'm gonna log out and I'm gonna log
back in as me.

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And put in my password.

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Sweet, alright, and if I go look at my
account then I see I have a follower.

120
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And let's go over here to test user, and

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I'm gonna go ahead, he's following one, or
she, they.

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I'm gonna go and follow them, there's
that.

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And now, let's go back to my account and
check that out.

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So, I have one follower and I am following
one person.

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Those buttons will make our app a lot
easier to use.

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And thanks to our followers and following
methods it was straight

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forward to add some information to our
user pages too.