Taming Twig

okay so this is Danny play thank you for

coming out to make it it's always

exciting to be here and to present with

everyone make sure that you can grab the

slides at the link at the top follow

along so a little bit about me

my name is leilani Todd I live here in

Chicago

I usually tweet very rarely but I do

about there just in case I work for a

company called hermetic we are we're a

distributed team so we have team members

all around the world so check this out

and now let's just dive right into the

subject matter today

taming Twitter so in my own experience

of using twitting the past few years

with Drupal 8 there's some common

problems that I've experienced and

they're really frustrating and when I

look at what Stack Exchange or sample

overflow if you look at all the problems

which I did in the past few weeks to see

and try to distill them into the same

sort of categories there's no common

categories so the first one is that your

changes just don't appear if you try to

print something on the screen we're

twiggy and it doesn't appear at all the

second one is that when you call a

variable in a quick template your output

just isn't what you expected you try to

call in the field and it doesn't appear

and the third and fourth ones are that

your site is unavailable or that is just

unresponsive at all so you're unable to

actually work with this anymore

so for the talk today we're going to

talk about how to address those four

common problems so first we're going to

talk about how to debug Twigg second

we're going to talk about the values

that you can find within your template

Derek about resolving any sort of PHP

errors and how to avoid them fourth the

dreaded white screen of death when your

site becomes unresponsive and finally

when something is too difficult to solve

by yourself and where to go over that's

where public so first debugging Twigg

let's talk about our debug setup so

where I services to Hamel file inside

slash default we are able to change some

values that we can make sure that we can

debug twig and have some sort of tools

available to us so under tweak that

config we have to make sure that debug

is set to true that I'll remove love

also set to true and caching a set to

false

all of these things by default if you

were to copy the default services that

ml family name it will be the opposite

of use now for a production site you

want to make sure that it's the opposite

of these but when you're locally

developing or working on a development

site you're trying to figure out what's

going on with your templates make sure

that these are set I've seen here

now the output when you expect something

look like a chrome inspector with those

value saying your services that yeah

well probably look something like this

you'll be able to see the sort of files

and suggestions that Drupal and tweak

are looking through in terms of what

file or what tweak file is being called

in and the kind of files that you have

available to you so in this case we can

see that it gets a specific as noted

file with the node IDs we can alter a

specific note or you can use a note type

so in our case we're using the basic

page template we have no - - page

available to us here and finally we have

our basic note that you should see on

that twig files so services I handle is

really helpful to just know when you're

working with a lot of different

templates and different fields and

things are being called in you'll have a

better idea of what tweak files were

working to address the issue that you

want to address available to us also is

the dump file with xx so here we're just

calling dump on content field in your

header so here we're just going to be

calling in our field header and if we

want to look at what that looks like

when it's printed out by default we just

get this array or a bunch of different

keys then we can call in these different

keys we can

like them in order to pull in the values

and tweak that we're trying to find to

us now another tool that's really useful

and pretty common is to use develop the

milk comes with a bunch of great things

developed in and of itself and there's a

module in it called eval kids this

allows us to use the camp function which

we call them the same way that we use a

dumb function so here we're calling it a

hint on classes which is part of the

page

that pretty much HTML that twig file and

it outputs up to the page in a similar

way as our dumb function except that we

have you sort of nested arrays that we

can dig into and so what gets loaded is

instead of having that ugly sort of a

dump array which is just a bunch of keys

you can actually go and find your key

selected and find more details about

what you kind of find out there now when

using kin I don't know if people have

experience to hear but in my own

experience I found that it's not as

performative as dump and that there's

usually like a bunch of problems

sometimes you're like you trying to do

Kent on a file or a variable and like

things just like the site doesn't load

your memory gets timed out so there's

another tool that I just found out about

in this past year which is it takes the

best of both rows so you have the

ability to use dump which usually is

pretty consistent in terms of its narrow

usage and you also get a nice output

like this where you can click through

and find the values you're trying to

find within a nested array in that tool

is this contributing module called twig

bard number

so here you have the ability to call

your tweak variable and to cycle through

it and find the values that you want to

do just by going through the nested

arrays to find the specific values that

you want to find so now that we have

these tools is there the tools we'll be

talking about today let's talk about how

we actually find the values specific

internal so we're going to talk about

first is just like the generic sort of

like a generic feel when you're working

with a node template or an entity

template of any sort so popular one is

using nodes you're using taxonomy terms

contributed module called paragraphs is

becoming more common these are the sort

of entities that this applies to so you

have when you work with a twig template

of content object within that content

object you have all the fields that are

on that entity so we're using dot

notation here so content dot field name

in order to call our field and to output

this sort of markup and data that we

have so in terms of like a vanilla sort

of approach this applies in most cases

just calling content got your field name

now we're going to look at a few

different examples that are a bit

different and then just the content dot

field name for example

and you try to find our links if we were

to have it feel called pit lane that's

just a generic Drupal field that we use

for links when we call that it outputs

both are linked and the text where the

title associated with that link which in

a lot of cases may be and that's what

you want you just want an anchor tag

with a link and if you want to add a

class or you want to do something to

those links or to modify them it

requires a bit more effort so here we

want to add a button class so that we

can you know present our link in a nice

way that looks like a button now if

we're digits we call content I feel

underscore link we wouldn't have access

to this so we can split that up by

accessing an array within there that has

Baylor l key and the title key so we can

split certain objects with dead twig and

then maybe like that how we see fit now

taking this long now this is also very

specific so when you're working with

twig usually you use dot notation for

all feein so content dot field link dot

an entity or dot image or something but

for fields it's specific to fields where

you would use the array notation here to

get within there now to find this this

is done by using twig and the debug

functions to find the use cases for this

this is a very prominent use case now

similarly if you want to work with our

files

we have to make sure we're calling the

file URL it's in order here we're just

ensuring that in our template we are

separating out the file URL value and

calling the file URL function on it to

make sure it is parsed correctly so the

notation here we're still using dot

notation we're calling node which is an

entity dot field value to get or sorry

excuse me field file to get our file

field we're calling entity to grab the

file

entity that's associated with our file

because for example in trupo if you're

using a standard Drupal file or image

field

those are entities or objects that are

stored on the fields we slice we chain

these sort of dog notations from node

dot file field pile to the entity and on

that entity we can get the URI and

within there we wrap the value of the

URI which allows us to translate it into

a URL

so with images it's essentially the same

sort of story we call our image field

we've grabbed the entity on there

we grab the URI and we turn that into a

value but with images it's a little bit

different in that images have the image

file which is just like a file but then

there's also titles that you can

associate with images

there's also alt text for accessibility

that you can use and if we want to do

special things with this

so in particular a really good use case

for using this sort of approach is when

you are working with lazy loaders

sometimes they require different

attributes within be HTML and in order

to pass in what a wants we're gonna have

to dig a bit deeper so we have our

generic sort of image approach with

turning my image into a doorbell they're

grabbing like an all field here this is

really particular with how we do it so

you think that the image field and the

alt tag or the title that's associated

with it would be on the image itself

that seems to be I mean that's what I

thought for a long time so I finally

discovered that the alt and the text

associated with it is on the image field

and not the image file so that's a clear

distinction of how we would go dig

deeper into the values that are

available to us within an image field in

order to grab content from there

okay we're going to talk really a little

bit about the without filter that tweak

has available to us so in a lot of

different templates if you were to look

at the default implementations you would

see that there's a content variable

there and it doesn't usually have any

sort of dot notation that you know links

to fields or have anything associated

with it usually to this content and for

the most part that could be good if you

just want to output a lot of different

fields in how you configure them within

Drupal site builders sort of

configurations of the node or a

paragraph or an entity type but we have

some use cases where you want to include

all the content except for one you want

to separate one of those fields out now

using the without filter within twig we

can pass in the Machine name of a field

to make sure that that field gets

excluded from the render and so we can

use that field name somewhere else so

here we are just printing all of our

content within our main div and outside

of that in a sidebar we're gonna put in

our field name so here we can start to

put the pieces together of how we would

separate out different pieces of content

that are out put in our twig templates

now there's a few use cases where we

have these two different variables

within a tweaked template that are a bit

different than how you usually approach

an entity type like a node or a taxonomy

term or a paragraph for example here we

have items and items is usually a field

for example a list filled with text

letters multiple items multiple

different values associated with it now

in this one in particular we're talking

about a field that is a it could either

be an integer list field you can either

be a string on the collection so we're

calling our field machine name whatever

it's called Silver's that both field -

lists based on that swing and we're

calling our

we're calling for loop on the items to

make sure that we are iterating through

each and every item and then on each

item in and of itself there is content

and content is attached to that specific

field item to output each of those

things now how is this valuable like

this if you open up a field within

Drupal just look at the default

implementation you're looking exactly

like this but if you wanted to do more

with it let's say that you've had let's

say that you wanted to loop through your

items and apply different classes those

things are available to us and it's

outside of the scope of this talk in

particular since there is a loop index

within twig that we can go through and

apply different things but within this

context using debug functions you'll be

able to find what's within the content

variable to explore within their field

specifically ROS works in almost the

same sort of way so Buse is a common

tool that we all use when building sets

with Drupal and within the ROS object we

have on grow and within there there's

content now that content is usually

defined by the sort of configurations

that we have set up for our views

whether we're calling in fields when we

set up our views or if we're calling it

out the alone to help it out different

node types

[Music]

so digging deeper into the content

variables is something that it took me a

while to figure out and to understand

that you know content isn't this like

the content variable is available

everywhere but each implementation is

slightly different so you think debug

functions will be really helpful in

terms of finding out and they're

standing exactly what you need to do to

output the content that you want so

let's put all of these together take a

look at an example of a field called

neighborhoods that just has some

neighborhoods of Chicago Street the

neighborhoods in Chicago so in our row

we're going to exclude dining roads

field because we want to do something

specific to it and here this might seem

super intimidating in terms of what's

available within the content variable so

if we were just to develop step through

it we have Rose which is all the

different pieces of content available to

us within the view within the content of

a specific room we have a view key that

gives us access to a few different

things so teaching in the style plug-in

and pulling the render tokens

[Music]

let's start it let's start at the step

tikka let's take a little bit of a step

back in terms of what's up what all is

going here with this view okay so

so the content that we have available to

us is a part of this view key and what

we're going to be passing into it is

going to be the tweed markup that that

feel that then that views is going to be

outputting so in the end we're going to

be calling our field underscore

neighborhoods as a variable as we see a

bit at the very bottom before the end

floor so this is within the same it's

the same notation as if you were working

directly within a twig template so you

have to have the double curly braces on

both sides it's a bit different because

I mean with a lot of how we would work

with these sort of things you'd think

that you just pass in the name of the

field in and of itself without the curly

braces braces but that doesn't work

since we're calling render tokens before

that now the loop index just means that

we dot index zero means what key what

number of well you're outputting so it

starts at zero one two three

all it's doing is just making sure that

Duty is iterating through each and every

row available to us and as the stop

plugin is what allows us to have access

to this sort of content

now there's a really handy contributed

module so the way that we talked about

everything so far is just if you

download Drupal 8 install it out of the

box you know work with some of the

default things or or check out any of

those sort of things that's how you'd

approach it there's a contributed model

Cox played on your score field down here

and it gives us these very specific sort

of filters where instead of having to

dig through the content variable instead

of having to dig through these sort

things we can pass in filters on these

fields in order to output the content

that we want so we have field label

which it's all very straightforward in

terms of what it's doing it returns a

label the value just returns your field

value without any of the wrappers

without any of the sort of dibs or

things that are associated with them

yeah field raw which is just like this

straight raw value that's being stored

within your database and then we have a

special one called field targets entity

now this returns your referenced object

of a field

now keep this target to t1 fine because

it will come in useful in the next few

slides so we're talking about our

neighborhoods field once again using

twig field value we can get the label

and we can get that value and get the

output that we desire so you can see the

neighborhood's we save you we see that

way Lincoln Park it's very straight

forward in terms of doing that it's a

matter of preference in terms of how

view yourself if you're working by

yourself which we want to want to

approach this sort of thing I know that

this can be contentious with development

teams in terms of some teams might not

want to use this contributing module or

have that sort of dependency which

they're sort of with the projects that

they're on so it's a sort of discussion

we need to have some people might feel

more comfortable with Twitter using

these sort of filters instead of the dot

notation to get the values that we're

looking for but I would Lobby in the

sense that you could do both they're not

mutually exclusive if you wanted to have

both your code base might look a bit

messy because you'd have filters and dot

notation calling in field values all

over the place what might not be the

best approach to do so to combine them

but the field target entity filter

that's available to us allows us to do

really cool things so this is why if I

were a LA if I were working with a team

and lobbying for this this contributed

module this to me makes it way more

accessible for someone who's less

experienced would tweak to destruct to

deal with some of the common issues when

we get to more expert use cases like

reference entities

so here we have a piece of content a

note that has an article reference and

if we were to call that we would just

get the whole article in of itself but

let's say we just want a specific value

we just want one field on that entity if

we call in and use the field target

entity filter that gives us access to

all of the fields that are available on

that entity in and of itself so if

you're using nested entities with your

nodes and your paragraphs

this is a really great use case in order

to control the sort of markup and to

have easier access to some of the values

within those entities without having to

do anything with a preprocessor because

another approach that this would be to

you know create a custom module or have

a hug step you know manipulates the

reference entity loads it grabs a

feeling pits it out there could be a lot

more code to do what this does with this

contributed module I'm enough in and of

itself so I think it's a really cool and

valuable useful tool if you are working

with referenced entities

some terms of addressing the issues with

finding values these are the four basic

steps in terms of how you would approach

it in your own development importance

so first always as with almost

everything related to duple you have to

make sure you clear your cache before

you reload your page

just make sure caches are cleared so

that your memories clear the site loads

the latest version next is using the

Twitter debug tool and inspecting the

elements and seeing that you have the

correct template that what you're trying

to do is within the same sort of naming

conventions that Drupal is trying to use

make sure that you have the right field

the Machine name and the property if you

know if you have typos if you if things

are a bit off nothing will clear it

finally we can use the VAR number call

to debug variables in to respect

elements that way so this next portions

of this talk are just going to be

talking mostly about how to address the

do-more some issues that are a big

headache in my own experience as I've

worked with place so first is just

avoiding PHP errors now when we

encounter these sort of errors there's

usually two main reasons why they're

happening for the most part if you're

just working with twig or you're working

within the theme there's two primary

places where things can go wrong the

first place is within the preprocessor

so this might be a common sort of site

and you're working you're making active

changes locally you're making and things

seem to go wrong you get this unexpected

error page please try again later which

means like fix it so

loading the page so pre-processing

issues is the first place to look in

terms of if there are errors on your

site and you're just working a click

check there first

now configuration we can go in there and

see what Arabic in there before I'm

passing in an incorrect render key and

it's causing problems in the ring so

that's why we have that area you can you

can find it you can dig a bit deeper and

see exactly what's happening and I'm

trying to run the needed at least you're

not flying blind the second place to

look if you're encountering there's a

twig is just within twig itself it's

usually pretty forgiving but if you have

any sort of syntax errors then you're

going to encounter some problems if

you're using your filters incorrectly

some filters within twig and the

documentation only accept a certain

number of parameters that you can pass

them like field values or that sort of

thing so if you're counting these are

issues with twig those are the two

places to look and we also can see that

in our database logging we're here we

have a syntax error because there's an

extra curly brace outside of the context

of what twig is trying to render so

we're not using our filter correctly

there so checklists for PHP errors first

just make sure the clear cache is

sometimes I could fix it you think

everything else is okay second is to

make sure you can check your admin /

reports and recent blog messages going

into the database longer to see the sort

of error messaging that you see third

determine whether is the pre-processing

functions or the twig file itself that's

causing you problems and then finally

try to address that problematic line or

the name of the file

efficiently now if you go through all

these steps and you're still having

issues one great way that I'm sure we

all have experience is just till I copy

the air and paste into Google and like

see what other people have done that's

usually will give you enough tools to

start to help find out the issues that

you're encountering and seeing even if

their novel there's something that no

one's experienced or if it's something

that a lot of people have then you can

get there that way in terms of all the

errors that you encountered like white

screen of definitely developing this

usually it's just that big it can be a

big time sink especially if you're only

working with twig or the theme and

you're not doing anything sort of

intensive on the back end and you come

into the bears it can be a huge sort of

headache and hassle and early on with

what's when I first started like I would

have come to these issues and I wouldn't

know exactly how to address them now a

big part of what we encounter these

issues is not necessarily Twitter itself

but because of the tools that we're

using in conjunction with Twitter so

this is probably something that you've

seen before I mean I see it all the time

it's really frustrating where you try to

look your side you get a fatal error it

says your membrane usage is being seated

now there's just a few reasons why this

happens in the first place but the

biggest sort of takeaway is just that

Drupal 8 is object oriented and there's

a lot of arrays and there's a lot of

objects that are being loaded so when

you try to call a debug function on on

certain variables within your files the

sort of memory usage that is trying to

help it's not just outputting the field

like you'd expect but there's a lot of

metadata there's

different things within an object that

causes your memory to overflow and so

that's essentially why this is happening

is in this specific example we're

calling Kent now I I used to look in on

the big fan of Twix bar Delbert just

because Kent seems to consistently

giving his problems no matter what sort

of project I'm on or redundant

environment

I work in work within so the one is just

to maybe not use rely on kids as much

and use some of the other tools

available to us but first let's talk

about the dump function that's available

out of the box without any contributed

modules it's a life screen of death now

this is not mine this is credit to

morning in terms of addressing and the

issue so the carry issue you're calling

a debug function your files your site

isn't working you can't even work with

or see anything being debunked on the

page now within every single tweak file

we have this special keyword variable

called underscore context now underscore

context is just an easier way of when

you call the dumb function without

passing anything in it's gonna be

calling underscore context each and

every time now that we have that you

know passing that underscore context

into a loop allows us to do some cool

things so here all that we're doing here

in this code is going into that context

so all of the things being a little bit

lightweight on that file and getting the

key and getting the values so you're

just going through the array and seeing

each and every item and we're dumping

out the value associated with the key so

that we can see the sort of values that

we have available to us the sort of keys

that are causing us problems

this this is a great tool to put in if

you're encountering the wide screen of

death sort of thing and you're just like

you just want to find a value you just

want to find it

and put it somewhere and you can't seem

to do that video function this will help

you get you on your way to doing that

now let's talk about hints in particular

there's some things that we always have

to remember and it's to make sure that

you pass in a specific variable like if

you don't pass in anything it's going to

kind of load everything and it's usually

I mean there's been issues in the extra

queue to address this but sometimes you

encounter the issue of the memory gets

starts overflow so if you pass in a

specific variable it's going to help you

to load in just what you want into the

debug functions for example of your

trendy bug trying to debug the content

very well in of itself and not the

classes not the metadata the other

things associated with the template you

just make sure you pass that so don't

don't try to just call it can't with

nothing in it that will help you

overcome this sort of issue with the

right screen of death and finally

credits th pool in terms of managing the

levels that can't pass so put in a pre

process function so this would be within

either a module file or a theme file you

can paste in just can't require to make

sure you can't class available to you

and then set the max levels so K by

itself is just gonna try to load in

every single item in metadata associated

with that so like you have a note is

gonna try to so load in your your fields

it's going to try to load in any sort of

entity references and feels associated

that's what you can use there's a lot of

different levels that Kent is trying to

do for you and if you have unlimited

memory you'd be able to see it all but

in our own environments usually we're

limited

the memory that we have so making sure

that our max levels is set gives us

enough leeway to dig a bit deeper into

the content variables and what we have

available to us so that we can still

work with the can still kind of debug

and go through the process without you

know not being able to access our site

at all now a few other tools that we

have available to us for a white screen

of death is limiting search like if you

have a modern computer and you're

working locally you can increase your

memory usage by alot I wouldn't

necessarily recommend unless you get

super frustrated which I found super

frustrated and said like the max like 16

games I kind of like so so if you want

him to feel like memory usage and

sometimes that can help you can do that

in your settings that PHP file there's

other ways to do this is a really sort

of good straightforward way to do so and

finally if we if you've tried all of

these things and you're still having

errors in your settings that PHP you can

turn off all the errors to see all of

them on your page to see like what's

happening is it is it something

different if you're working with the

team that someone else makes something

that you can go to them for and find

assistance for so our checklist for a

white screen of death is the first one

annoys make sure we clear all that

caches finally next is to resolve the

scope of the debug function so passing

something specific into your debugger so

that it's not trying to load the whole

tree of objects third the opening and

closing tags of your twig or pre process

functions or files make sure that

they're there sometimes you're going to

accidentally delete them and you swear

that they're there but they're not

it's a twat another to increase your

memory usage temporarily and finally

just display all the Arabs that are

there so we're going to talk a little

bit about where to go when all of these

things within the checklist don't seem

to help when you've tried using

debuggers and you still just can't seem

to find the values or fix the issues

when you're working with twig-like where

do we go for this sort of advanced help

now first someone to describe like I

would say advanced help in context of

this talk is so first is your sight

stops working completely like you you

try to make a change or you pull down a

change will give or from whatever

version control that you're using and

your slide just doesn't seem to work at

all by any means so it's completely

unresponsive you get a wide screen of s

you try to go to you try to log in and

go to the admin page look at the

database log and it's blank to you check

your database and David's logging

there's nothing near there that site is

like dead like it's just completely dead

that would be one of the definitions of

you know seek out an additional the

second is that the log paid so database

logging seems to be disabled and nothing

comes through and finally your memory

usage is out of control these are all

issues that with the sort of tools that

we have available to us in terms of

managing pins or managing our dumb

functions or using manipulating

configuration files with power our

development environment is structured if

all of those tools don't seem to work

that's the time to find some advanced

software to find see if you can find

some

that can help you I know there's some

resources to find that under itself yeah

these are some great resources that I

personally abuse and encounter in terms

of resolving some very specific use case

issues with Twigg

so let's go and look at a few of them

the first one is Drupal - a contentious

slack it's okay not part of your slack

channel make sure you sign up and join

there's a lot of very intelligent

incredibly intelligent and smart and

help with people there that that if you

have a problem that seems to be novel

something that you can't find in you

google it look for their the IRC channel

is another one that's there

Drupal twig you can find it you know

people talk about great things about it

in with the frustrating if you look at

the hash tag and if I like Stack

Overflow there's another place to find

and seek out that sort of advanced

assistance with twig now if you really

encounter an issue it's like that it

seems to not be anywhere on the web the

best place to check is on the github for

the kwid project in and of itself

there's a lot of different contributors

from Drupal from craft from a lot of

different PHP CMS's that are active and

working on Twitter to make it better and

address these sort of issues so if you

encounter something that seems to be

like oh I don't know anyone's ever seen

this you know make an issue in the issue

queue or search it to see if it's there

except it might be there now finally

with twig there are some really great

ways in terms of leveling off so like

taking our twig skills to the next level

and you know these are just like a few

plugs of tools and things that I found

super useful so the first one if

anyone's going to Drupal con

North America

there's Athena Jubilate training you

know this has been sort of consistent in

terms of all the triple Khan's by the

folks at triple as me last year was sold

out by the time it was man camp I think

right now there's still some slots so if

you're interested in like

learning more about theming Drupal 8 and

writing the twig and and JavaScript and

halt those things I recommend checking

their Drupal ëismí is another really

great resource in terms of learning more

about how Drupal works but also twig in

particular they have some really good

content to dig a bit deeper into some

twig ins in advanced usage came to

university Ryan de Nino there they're

really super folks that have some great

tools not just with tweak but it was

symphony in Drupal 8 a little plug for

chromatic HQ company I work for we have

a blog that we spend a lot of time

curating and and working with this sort

of writing about debriefing about the

issues that we encounter in ourselves

and we're working with twig so be sure

to check it out and subscribe to our

newsletter finally a really good way to

play the best way to level up your

skills and twig or anything is to go to

a sprint so we have a sprint in this

room tomorrow on Sunday anyone that

wants contributor was to check it out I

would encourage everyone to join I know

the first time that I went to a sprint I

was like Brandi to Drupal and I felt

like in Austria like I wouldn't have

been there but I would really recommend

anyone that feels that way to just give

it a try because people here are so kind

in terms of getting people involved in

the community going to issue queue

looking at different things and early on

in my own career I've learned so much by

finding mentors and finding people to

help me in a lot of network

camps and conferences so big shout out

to the spreads that are happening on

Sunday and also throughout the

conference so we have a bit of time for

some questions and answers at the end so

thank you all for being we have the URL

for the slides again yes

I notice it's a it's not a great color

there

so this light Tyler are out there I

notice that there are a couple of

changes I've been making through those

slides the link isn't as to explain the

link will stay the same the decided be

updated I noticed like you wanted to

have was there yes hey what was the

remodel or tweak filters that were

special values label reference entity

and why did I have to come here talk to

my buddy work within the community at

Whitfield value its I mean I only

discovered it in the past like earlier

this year so that good excuse this been

super good go throw them so it's right

here

living yes we used a loop index 0 and a

loop index later opposite difference ok

so this time this so looped out

so with that index 0

index zero is just the counter above the

loop again so that's the throw that

you're on yes

sloop dot index

so here we're we're wanting to find the

specific value equal to two so we're not

going through each and every one in in

the array so the first one we start at

zero goes all yes that's where all they

match that that value sir

yeah this moment yeah we're calling it

just to match that one why are you using

index versus index zero oh so he put it

this is a this is a good question that's

a really good question so I've only used

this in and so for the recording

everything this the question was why

loop index on this slide in particular

and not loop dot index zero equals to

and from focus worth this this is I just

like using a wholesale from more in just

like copy pasted and always work so I

never really gotten into the difference

of why but I know that this works so I

just use this sorry

I think the index zero is just start to

zero in the next time okay so if the

index starts at index zero time to zero

index starts at 1

so we limit our things here and this

life too - what are you - reuse of the

twig week term as well sounds like the

first week before that one yeah so the

question is why I didn't talk about to a

Tweaker like a difference between a

computer module and twig field value I

think that you can create me from long

the tweak tweak does a bit more than the

field value there's a bit more tools

available to you to use that I'm not

gonna be a fan of the field value just

because of the enemy reference sort of

the easiness of that I haven't used

tweet tweet any references in that

context so I'm not sure it's as straight

forward and telling each other chain

values there but to previous is like an

interesting module yes haven't had as

much time using it as the others

that's all the questions here Chris yeah

so in through seven I use our function a

lot one thing that I liked about that

one was that we run through and find the

variable that you're looking for able to

get a relative path pretty easily is

there any way to get relative paths with

either Barca bargain for a dumper or

Kanto images of the ones yeah so for

recording the question is the relative

back using KP r is pretty accessible and

is it as accessible with don't remember

first just to clarify the direct path of

what I introduced with a particular

variable so I in kpr it spits out all

these things but when you found what

you're looking for you know will click

it and give you whether it's objects or

rays but the how to get to this

particular value with Canton these other

ones these newer ones

seems like you have to draw your own map

all the way to the valley that you're

looking for so if it's nested six levels

deep you'd have to keep track of which

array objects and this it's known that

so I would say dump is not good at

helping you

in the self kenta's a little better of

our dumper with the tool that we have

here it's a bit of both world so you can

try to click through and and create that

sort of pathway but it doesn't always

work I think that an easier way of doing

that is like combining the debug

functions with some of the standard the

Drupal calls sort so in this case we're

talking one more specific with that like

a preprocessor and then there like a

quick debugger in and of itself so like

combining an approach of first always

try to see if you can you know retrace

it using the same sort of methodology

we've had with kpr but if that doesn't

work usually there's some things we can

do to at least the object that we find

in there to find a specific value or to

find something using it

or something like that yes

sort of a hard time finding the exact

value

yeah usually the first approach it just

to make sure you'd calm your field names

like feel like if you have and that

Islamic state sometimes you'll have

access to the configuration to see the

Machine name of fields but if you do

have that access to call that and just

call it value to see like its outputs

were to pass that into the book function

if not you can go deeper or the try to

open up the stack of in ones calling the

content variable to see what's available

to you oh sorry for the recording the

question was like how you it's not

always clear like how to get specific

value for people you know that stuff

like with this presentation in

particular with the URL that's like the

line that's probably that odd man out in

terms of field values and then lists

select lists fields those ones usually

are their difference in terms of time of

course of the most at time to be your

like your entity or a content your

people name value to fine

yes of course beginning you had

[Music]

placed

I'm assuming that bottle trade where I

was there was dissipation between

yes that's a really good question so the

question is in this talk we have PI R

squared u RL as a twig function and that

is a dribble specific functions is that

there's a handful of doable specific

functions an easy way to do is you just

looked at the twig documentation online

I think that there's it's less than it's

like a handful of twig functions are

very specific to Drupal compile URLs is

just one of them this is just a twig

documentation bridgeable will have those

filters and functions available to

yes something had interest like the

encounter of problem where I had to

tweak debugger and I was trying to get a

get the rather value for this boolean

but when I output the value to an actual

like tweak debugging text will be in

there as well so I had to like convert

it to a string and then I strip it

for balls that get angry too late but

move that from the dump when you're

getting can I get just true or false

value

yes so question is when we've looked

like boolean fields sometimes when we

try to debug them or try to you know

assign a variable to true or false

nature there are always usually

populated right like when you try to

check for it these things usually within

there yeah yeah that's a that's been a

huge frustration personally with like my

own brute-force approach is to

pre-process it do custom approach in

terms of like creating a custom variable

and then using that to determine whether

there's true or false true there's

values like the consistency of using

some of these things like there's

metadata or other things associated with

those content things that are like you

speak you speak specific and like

somewhat frustrating to dig a bit deeper

into but I would just try to pre-process

it instead of trying to handle it within

twig and I'm using the law or using all

these different filters to go through it

but yeah