what is going on everybody welcome to part 16 of the go language tutorial
part 16 of the go language tutorial
part 16 of the go language tutorial series in this part what we’re gonna be
series in this part what we’re gonna be
series in this part what we’re gonna be talking about is templating with gos
talking about is templating with gos
talking about is templating with gos HTML slash templating package so what
HTML slash templating package so what
HTML slash templating package so what I’ve got up here right now is just your
I’ve got up here right now is just your
I’ve got up here right now is just your typical hello world go web app example
typical hello world go web app example
typical hello world go web app example and what I’d like to do is show you how
and what I’d like to do is show you how
and what I’d like to do is show you how you can incorporate templates so first
you can incorporate templates so first
you can incorporate templates so first of all you know all the things that
of all you know all the things that
of all you know all the things that we’ve shown up to this point even in
we’ve shown up to this point even in
we’ve shown up to this point even in this tutorial what we’re going to show
this tutorial what we’re going to show
this tutorial what we’re going to show with templates is just gonna be super
with templates is just gonna be super
with templates is just gonna be super basic and you could do it all without
basic and you could do it all without
basic and you could do it all without templates the problem is when your code
templates the problem is when your code
templates the problem is when your code begins to get a little more complex and
begins to get a little more complex and
begins to get a little more complex and you start to incorporate things like
you start to incorporate things like
you start to incorporate things like JavaScript or even just even just when
JavaScript or even just even just when
JavaScript or even just even just when you start doing more complicated HTML
you start doing more complicated HTML
you start doing more complicated HTML systems and styling and all that I think
systems and styling and all that I think
systems and styling and all that I think it will be kind of problematic to keep
it will be kind of problematic to keep
it will be kind of problematic to keep using go in line with your code now some
using go in line with your code now some
using go in line with your code now some people might actually prefer that way
people might actually prefer that way
people might actually prefer that way and that’s totally fine I mean if you’re
and that’s totally fine I mean if you’re
and that’s totally fine I mean if you’re coming from something like PHP that
coming from something like PHP that
coming from something like PHP that might feel really natural to you and by
might feel really natural to you and by
might feel really natural to you and by all means go for it but for me I think
all means go for it but for me I think
all means go for it but for me I think it’s better I would rather it use
it’s better I would rather it use
it’s better I would rather it use templates but if you don’t want to use
templates but if you don’t want to use
templates but if you don’t want to use templates after this that’s probably
templates after this that’s probably
templates after this that’s probably fine you could get away with using that
fine you could get away with using that
fine you could get away with using that kind of Tildy multi-line stuff and
kind of Tildy multi-line stuff and
kind of Tildy multi-line stuff and probably be okay
probably be okay
probably be okay but anyways I’m gonna be showing you
but anyways I’m gonna be showing you
but anyways I’m gonna be showing you guys how to make use of the templates so
guys how to make use of the templates so
guys how to make use of the templates so with that let’s go ahead and get started
with that let’s go ahead and get started
with that let’s go ahead and get started so if you don’t have this code just go
so if you don’t have this code just go
so if you don’t have this code just go to this tutorial there’s a link in the
to this tutorial there’s a link in the
to this tutorial there’s a link in the description at least that leads to this
description at least that leads to this
description at least that leads to this go series and then you can just go to
go series and then you can just go to
go series and then you can just go to part 16 and grab the starting code if
part 16 and grab the starting code if
part 16 and grab the starting code if you want what I’m gonna do is I’m gonna
you want what I’m gonna do is I’m gonna
you want what I’m gonna do is I’m gonna go ahead and make a new page so we’re
go ahead and make a new page so we’re
go ahead and make a new page so we’re just gonna have HTTP dot handle func and
just gonna have HTTP dot handle func and
just gonna have HTTP dot handle func and then this is gonna lead to slash a GG
then this is gonna lead to slash a GG
then this is gonna lead to slash a GG for AG because it’ll be our news
for AG because it’ll be our news
for AG because it’ll be our news aggregator and I’m gonna have basically
aggregator and I’m gonna have basically
aggregator and I’m gonna have basically we’re just gonna make a news
we’re just gonna make a news
we’re just gonna make a news aggghhhhh handler we should probably
aggghhhhh handler we should probably
aggghhhhh handler we should probably there you go Handler and the new zag
there you go Handler and the new zag
there you go Handler and the new zag handler basically this is going to take
handler basically this is going to take
handler basically this is going to take your templates and or at least this is
your templates and or at least this is
your templates and or at least this is gonna be our page right which is going
gonna be our page right which is going
gonna be our page right which is going to use a template and when you use a
to use a template and when you use a
to use a template and when you use a template you’re going to execute a
template you’re going to execute a
template you’re going to execute a template and when you execute that
template and when you execute that
template and when you execute that template you can
template you can
template you can past the writer and then you pass the
past the writer and then you pass the
past the writer and then you pass the variable the single variable so if
variable the single variable so if
variable the single variable so if you’re not noticing a trend here and go
you’re not noticing a trend here and go
you’re not noticing a trend here and go you rarely get to pass multiple
you rarely get to pass multiple
you rarely get to pass multiple variables or values if you want to do
variables or values if you want to do
variables or values if you want to do that you need to struct so so that’s
that you need to struct so so that’s
that you need to struct so so that’s what we’re going to go ahead and do the
what we’re going to go ahead and do the
what we’re going to go ahead and do the lifeblood of go the struct so let’s go
lifeblood of go the struct so let’s go
lifeblood of go the struct so let’s go ahead and just do type and then we’ll
ahead and just do type and then we’ll
ahead and just do type and then we’ll call this new zag page and that will be
call this new zag page and that will be
call this new zag page and that will be a struct and for now we’re just gonna
a struct and for now we’re just gonna
a struct and for now we’re just gonna have two values we’re gonna have the
have two values we’re gonna have the
have two values we’re gonna have the title and that’ll be a string and then
title and that’ll be a string and then
title and that’ll be a string and then we’re gonna have news and that’ll be a
we’re gonna have news and that’ll be a
we’re gonna have news and that’ll be a string also before I forget let’s go
string also before I forget let’s go
string also before I forget let’s go ahead and make our import so we’re gonna
ahead and make our import so we’re gonna
ahead and make our import so we’re gonna bring in HTML slash template so that we
bring in HTML slash template so that we
bring in HTML slash template so that we can do the templating so now let’s go
can do the templating so now let’s go
can do the templating so now let’s go ahead and make our new zag handler so
ahead and make our new zag handler so
ahead and make our new zag handler so let me just and in fact actually I’m
let me just and in fact actually I’m
let me just and in fact actually I’m just gonna copy this so I have to write
just gonna copy this so I have to write
just gonna copy this so I have to write it all out and then I’m gonna copy and
it all out and then I’m gonna copy and
it all out and then I’m gonna copy and paste music handler nice so now what we
paste music handler nice so now what we
paste music handler nice so now what we want to do is just work on the code that
want to do is just work on the code that
want to do is just work on the code that we’re gonna need here so first of all
we’re gonna need here so first of all
we’re gonna need here so first of all we’re gonna use P to be our page so I’m
we’re gonna use P to be our page so I’m
we’re gonna use P to be our page so I’m just going to say P colon equals and
just going to say P colon equals and
just going to say P colon equals and that’s gonna be the new zag page and
that’s gonna be the new zag page and
that’s gonna be the new zag page and then in here we’re gonna just gonna hard
then in here we’re gonna just gonna hard
then in here we’re gonna just gonna hard code some values so we’re gonna say
code some values so we’re gonna say
code some values so we’re gonna say title and then the title can be
title and then the title can be
title and then the title can be literally anything I’m gonna call this
literally anything I’m gonna call this
literally anything I’m gonna call this the amazing news aggregator and then the
the amazing news aggregator and then the
the amazing news aggregator and then the news itself again we’re just gonna have
news itself again we’re just gonna have
news itself again we’re just gonna have you know some news for now so that’s
you know some news for now so that’s
you know some news for now so that’s gonna be our page and all its values now
gonna be our page and all its values now
gonna be our page and all its values now what we want to do is create the actual
what we want to do is create the actual
what we want to do is create the actual template itself so we’re gonna say
template itself so we’re gonna say
template itself so we’re gonna say template and then any error if it was
template and then any error if it was
template and then any error if it was passed we’re not gonna worry about
passed we’re not gonna worry about
passed we’re not gonna worry about errors right now eventually we’ll talk
errors right now eventually we’ll talk
errors right now eventually we’ll talk about errors and all that and the panic
about errors and all that and the panic
about errors and all that and the panic and recover all that stuff but for now
and recover all that stuff but for now
and recover all that stuff but for now we’re not going to do anything with it
we’re not going to do anything with it
we’re not going to do anything with it so we need to under case it because
so we need to under case it because
so we need to under case it because we’re not going to use it so so yeah so
we’re not going to use it so so yeah so
we’re not going to use it so so yeah so basically our template will be a
basically our template will be a
basically our template will be a template from what we imported above
template from what we imported above
template from what we imported above HTML slash template and then parse files
HTML slash template and then parse files
HTML slash template and then parse files parse files and the file we want to
parse files and the file we want to
parse files and the file we want to parse to be our template is going to be
parse to be our template is going to be
parse to be our template is going to be basic templating HTML so we’re gonna be
basic templating HTML so we’re gonna be
basic templating HTML so we’re gonna be making our template in there it’s gonna
making our template in there it’s gonna
making our template in there it’s gonna be
be
be this can be amazing HTML code so now
this can be amazing HTML code so now
this can be amazing HTML code so now that we’ve done that finally the last
that we’ve done that finally the last
that we’ve done that finally the last thing that we want to do is we need to
thing that we want to do is we need to
thing that we want to do is we need to actually execute this page so so what
actually execute this page so so what
actually execute this page so so what we’re going to do is we’re gonna say T
we’re going to do is we’re gonna say T
we’re going to do is we’re gonna say T for our template that we just did
for our template that we just did
for our template that we just did execute and then what we’re gonna
execute and then what we’re gonna
execute and then what we’re gonna execute is with our writer and then what
execute is with our writer and then what
execute is with our writer and then what we’re going to say is is we’re gonna
we’re going to say is is we’re gonna
we’re going to say is is we’re gonna pass any values so we’re passing P which
pass any values so we’re passing P which
pass any values so we’re passing P which is that news aggregator page with these
is that news aggregator page with these
is that news aggregator page with these values here so we can reference actually
values here so we can reference actually
values here so we can reference actually these values so with that we’re
these values so with that we’re
these values so with that we’re basically done we just need to actually
basically done we just need to actually
basically done we just need to actually write the basic templating HTML page so
write the basic templating HTML page so
write the basic templating HTML page so I’ve already got one created or at least
I’ve already got one created or at least
I’ve already got one created or at least I created the file but we’re gonna need
I created the file but we’re gonna need
I created the file but we’re gonna need to populate it so if you don’t have this
to populate it so if you don’t have this
to populate it so if you don’t have this already go ahead and make one real quick
already go ahead and make one real quick
already go ahead and make one real quick open it up and you’re ready to go so
open it up and you’re ready to go so
open it up and you’re ready to go so we’re gonna make first the basically the
we’re gonna make first the basically the
we’re gonna make first the basically the title so we’re gonna put that in header
title so we’re gonna put that in header
title so we’re gonna put that in header one tags a nice big tags and then to
one tags a nice big tags and then to
one tags a nice big tags and then to specify any sort of structures values
specify any sort of structures values
specify any sort of structures values whatever inside or basically inside your
whatever inside or basically inside your
whatever inside or basically inside your templates but go structures sort of you
templates but go structures sort of you
templates but go structures sort of you you need the double curly braces okay
you need the double curly braces okay
you need the double curly braces okay and so what we’re gonna do inside these
and so what we’re gonna do inside these
and so what we’re gonna do inside these double curly braces is specify we wanna
double curly braces is specify we wanna
double curly braces is specify we wanna we want just the title so we’re gonna
we want just the title so we’re gonna
we want just the title so we’re gonna use a dot to note basically this is a
use a dot to note basically this is a
use a dot to note basically this is a variable here and we’re just going to
variable here and we’re just going to
variable here and we’re just going to say title title and if title had values
say title title and if title had values
say title title and if title had values you could do title dot i don’t really
you could do title dot i don’t really
you could do title dot i don’t really like impose titles like a list of titles
like impose titles like a list of titles
like impose titles like a list of titles like we might have it could be titles
like we might have it could be titles
like we might have it could be titles dot title or something like that or
dot title or something like that or
dot title or something like that or probably title with this anyway but we
probably title with this anyway but we
probably title with this anyway but we just want titles that’s it so we just
just want titles that’s it so we just
just want titles that’s it so we just use that first dot and then what we’re
use that first dot and then what we’re
use that first dot and then what we’re gonna do is after our titles we would
gonna do is after our titles we would
gonna do is after our titles we would have I don’t know some news so we’ll
have I don’t know some news so we’ll
have I don’t know some news so we’ll have some paragraph tags and then again
have some paragraph tags and then again
have some paragraph tags and then again here we would just do dot News and we
here we would just do dot News and we
here we would just do dot News and we can save that so once we have that we
can save that so once we have that we
can save that so once we have that we are ready to actually run this
are ready to actually run this
are ready to actually run this application so I’m gonna go ahead and
application so I’m gonna go ahead and
application so I’m gonna go ahead and just go run go touch so go run go to see
just go run go touch so go run go to see
just go run go touch so go run go to see if we have any errors we do we use
if we have any errors we do we use
if we have any errors we do we use probably a single quote at some point in
probably a single quote at some point in
probably a single quote at some point in line 16 I’m not seeing it let’s see 16
line 16 I’m not seeing it let’s see 16
line 16 I’m not seeing it let’s see 16 here okay yep
here okay yep
here okay yep I was looking at the wrong line so
I was looking at the wrong line so
I was looking at the wrong line so someone asked and I think it’s a great
someone asked and I think it’s a great
someone asked and I think it’s a great question why can’t we use single quotes
question why can’t we use single quotes
question why can’t we use single quotes and go have I just not maybe I’ve not
and go have I just not maybe I’ve not
and go have I just not maybe I’ve not reached the point where a single quote
reached the point where a single quote
reached the point where a single quote is actually like a really meaningful
is actually like a really meaningful
is actually like a really meaningful thing and go but if someone has that
thing and go but if someone has that
thing and go but if someone has that answer feel free to let us know cuz I
answer feel free to let us know cuz I
answer feel free to let us know cuz I still haven’t come across any reason why
still haven’t come across any reason why
still haven’t come across any reason why I can’t use a single quote T dot execute
I can’t use a single quote T dot execute
I can’t use a single quote T dot execute what did I do wrong there did we use a
what did I do wrong there did we use a
what did I do wrong there did we use a underscore we did so that would never
underscore we did so that would never
underscore we did so that would never work right needs to be exported so
work right needs to be exported so
work right needs to be exported so capital that capitalized that e try
capital that capitalized that e try
capital that capitalized that e try again third time’s a charm oh yeah here
again third time’s a charm oh yeah here
again third time’s a charm oh yeah here we go I’ll allow it
we go I’ll allow it
we go I’ll allow it let’s do it wait for it okay so what we
let’s do it wait for it okay so what we
let’s do it wait for it okay so what we can do now is we can come to our home
can do now is we can come to our home
can do now is we can come to our home page I’m just going to do slash tag and
page I’m just going to do slash tag and
page I’m just going to do slash tag and [Music]
[Music]
[Music] interestingly I am empty-handed what did
interestingly I am empty-handed what did
interestingly I am empty-handed what did we do wrong basic templating that HTML
we do wrong basic templating that HTML
we do wrong basic templating that HTML for some reason I don’t have anything in
for some reason I don’t have anything in
for some reason I don’t have anything in egg title news up okay sorry
egg title news up okay sorry
egg title news up okay sorry so man typos galore anyway I simply
so man typos galore anyway I simply
so man typos galore anyway I simply wanted to show an example with titles
wanted to show an example with titles
wanted to show an example with titles and then I screwed myself and I think
and then I screwed myself and I think
and then I screwed myself and I think news stayed news so here we can actually
news stayed news so here we can actually
news stayed news so here we can actually just modify the HTML template we don’t
just modify the HTML template we don’t
just modify the HTML template we don’t have to restart anything hopefully that
have to restart anything hopefully that
have to restart anything hopefully that fixes it sure enough it does okay so so
fixes it sure enough it does okay so so
fixes it sure enough it does okay so so yeah if you’re missing that variable it
yeah if you’re missing that variable it
yeah if you’re missing that variable it won’t error out on you it just I mean it
won’t error out on you it just I mean it
won’t error out on you it just I mean it errors somewhere it’s just very
errors somewhere it’s just very
errors somewhere it’s just very secretive to you and that’s why you need
secretive to you and that’s why you need
secretive to you and that’s why you need to eventually have probably the cover of
to eventually have probably the cover of
to eventually have probably the cover of the panics and all that because errors
the panics and all that because errors
the panics and all that because errors and go are only occur really if you ask
and go are only occur really if you ask
and go are only occur really if you ask them to occur otherwise they’re kind of
them to occur otherwise they’re kind of
them to occur otherwise they’re kind of hidden and and they don’t really bug you
hidden and and they don’t really bug you
hidden and and they don’t really bug you which can be kind of problematic when
which can be kind of problematic when
which can be kind of problematic when you hit issues like this so I’m guessing
you hit issues like this so I’m guessing
you hit issues like this so I’m guessing if we had not done this like I’m just
if we had not done this like I’m just
if we had not done this like I’m just curious at this point I’ve actually not
curious at this point I’ve actually not
curious at this point I’ve actually not tested this I’m just going to go ahead
tested this I’m just going to go ahead
tested this I’m just going to go ahead and throw air there and then
and throw air there and then
and throw air there and then format diet wine air it’ll probably nil
format diet wine air it’ll probably nil
format diet wine air it’ll probably nil i I’m not even sure if it prints out now
i I’m not even sure if it prints out now
i I’m not even sure if it prints out now you can also just say if air not equals
you can also just say if air not equals
you can also just say if air not equals nil something like that print that out
nil something like that print that out
nil something like that print that out let me go ahead and save that real quick
let me go ahead and save that real quick
let me go ahead and save that real quick I’m just curious to this point this
I’m just curious to this point this
I’m just curious to this point this tutorial is over you’re probably going
tutorial is over you’re probably going
tutorial is over you’re probably going to learn anything new besides answering
to learn anything new besides answering
to learn anything new besides answering this question I’ll allow it but I’m just
this question I’ll allow it but I’m just
this question I’ll allow it but I’m just curious so okay so it does at least
curious so okay so it does at least
curious so okay so it does at least print nil and then if we go and change
print nil and then if we go and change
print nil and then if we go and change this to be like titles save that just
this to be like titles save that just
this to be like titles save that just for the record I mean you should be
for the record I mean you should be
for the record I mean you should be seeing this on your screen too but yeah
seeing this on your screen too but yeah
seeing this on your screen too but yeah let me just refresh it again oh so no
let me just refresh it again oh so no
let me just refresh it again oh so no that’s not giving us the error hmm I
that’s not giving us the error hmm I
that’s not giving us the error hmm I wonder where the error would happen if
wonder where the error would happen if
wonder where the error would happen if it would be maybe at this stage no I
it would be maybe at this stage no I
it would be maybe at this stage no I wouldn’t have it in this stage you would
wouldn’t have it in this stage you would
wouldn’t have it in this stage you would think it would happen right here at this
think it would happen right here at this
think it would happen right here at this stage maybe T dot execute returns an
stage maybe T dot execute returns an
stage maybe T dot execute returns an error if it has it I’m just curious like
error if it has it I’m just curious like
error if it has it I’m just curious like I said tutorials over if you want to
I said tutorials over if you want to
I said tutorials over if you want to leave feel free templates what was that
leave feel free templates what was that
leave feel free templates what was that HTML template going then I’ll just
HTML template going then I’ll just
HTML template going then I’ll just search execute of course we could oh
search execute of course we could oh
search execute of course we could oh yeah so T execute does return an error
yeah so T execute does return an error
yeah so T execute does return an error that was quick so one thing we could do
format dot print line
format dot print line [Music]
[Music]
[Music] so rather than this error and I’ll just
so rather than this error and I’ll just
so rather than this error and I’ll just comment out that error let’s see if we
comment out that error let’s see if we
comment out that error let’s see if we get an error this time don’t you just
get an error this time don’t you just
get an error this time don’t you just love go I wish you could declare stuff
love go I wish you could declare stuff
love go I wish you could declare stuff and not use it that drives me nuts
and not use it that drives me nuts
and not use it that drives me nuts because I’m just trying to debug that I
because I’m just trying to debug that I
because I’m just trying to debug that I keep running into it because of that I
keep running into it because of that I
keep running into it because of that I mean I’m definitely notorious for for
mean I’m definitely notorious for for
mean I’m definitely notorious for for declaring stuff and not using it but
declaring stuff and not using it but
declaring stuff and not using it but that’s annoying
that’s annoying
that’s annoying so nil no let’s go ahead and cause an
so nil no let’s go ahead and cause an
so nil no let’s go ahead and cause an error see if this won’t do it for us Oh
error see if this won’t do it for us Oh
error see if this won’t do it for us Oh reload the page there we go nice so yeah
reload the page there we go nice so yeah
reload the page there we go nice so yeah so there’s how you couldn’t could have
so there’s how you couldn’t could have
so there’s how you couldn’t could have acquired the error
acquired the error
acquired the error but we were letting it pass silently
but we were letting it pass silently
but we were letting it pass silently because it’s go and that’s what that’s
because it’s go and that’s what that’s
because it’s go and that’s what that’s what errors do and go you have to you
what errors do and go you have to you
what errors do and go you have to you have to specifically ask for them to
have to specifically ask for them to
have to specifically ask for them to rear their heads anyway
rear their heads anyway
rear their heads anyway hi I’m interesting and that’s why most
hi I’m interesting and that’s why most
hi I’m interesting and that’s why most go programs they don’t look like this a
go programs they don’t look like this a
go programs they don’t look like this a lot of times a little say like if air
lot of times a little say like if air
lot of times a little say like if air equals no or if air yeah either Eagles
equals no or if air yeah either Eagles
equals no or if air yeah either Eagles no or if error does not equal meal what
no or if error does not equal meal what
no or if error does not equal meal what are we gonna do let’s actually print it
are we gonna do let’s actually print it
are we gonna do let’s actually print it out and all that
out and all that
out and all that not if air equals no anyways oh okay
not if air equals no anyways oh okay
not if air equals no anyways oh okay cool a little bonus for anybody who’s
cool a little bonus for anybody who’s
cool a little bonus for anybody who’s happened to stick around that’s it for
happened to stick around that’s it for
happened to stick around that’s it for now what we’re going to be doing in the
now what we’re going to be doing in the
now what we’re going to be doing in the next tutorial is applying these
next tutorial is applying these
next tutorial is applying these templates to our web app and actually
templates to our web app and actually
templates to our web app and actually doing something that involves a little
doing something that involves a little
doing something that involves a little more HTML because obviously this was
more HTML because obviously this was
more HTML because obviously this was something we could have very easily
something we could have very easily
something we could have very easily maybe even easy you’re more easily done
maybe even easy you’re more easily done
maybe even easy you’re more easily done I don’t know anyway could have been
I don’t know anyway could have been
I don’t know anyway could have been easier maybe even just doing it in line
easier maybe even just doing it in line
easier maybe even just doing it in line with go so anyways let’s go ahead and
with go so anyways let’s go ahead and
with go so anyways let’s go ahead and actually apply this to something a
actually apply this to something a
actually apply this to something a little more complicated but not too
little more complicated but not too
little more complicated but not too complicated
complicated
complicated with our news aggregator web app if you
with our news aggregator web app if you
with our news aggregator web app if you guys have questions comments concerns
guys have questions comments concerns
guys have questions comments concerns whatever feel free to leave them below
whatever feel free to leave them below
whatever feel free to leave them below otherwise I will see you in the next
otherwise I will see you in the next
otherwise I will see you in the next tutorial
”
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