Question to HTL or Sightly experts - What is wrong with the HTL expression "${'{0}' in title ? title @ format=currentPage.parent.title : title}"?

[Sravan_Kumar_Si]

model.title contains one of the two values - "Back to {0}" or "Back"
<sly data-sly-test.title="${model.title}"/> 

<a>${'{0}' in title ? title @ format=currentPage.parent.title : title}</a>

Neither

${'{0}' in title ? title @ format=currentPage.parent.title : title}

nor

${'{0}' in title ? (title @ format=currentPage.parent.title) : title}

gives the expected result. What is the correct way?

[Sravan_Kumar_Si]

Hi @KiranVedantam1992  and @Manjunath_K , Thanks for getting back but this did not solve my issue. My objective is if the place holder {0} is there in the value of title then replace it otherwise simple use the value of title. '{0}' in title - this is to check for the existence of substring '{0}' in value of title variable. If I enclose every thing inside '' then "in" is not considered as an operator and "title" is not taken as value of the variable.

[KiranVedantam1992]

Hi to replace and use parentpageTitle instead of title you can use the below code:

<a>${'{0}' in title ? currentPage.getParent.getTitle : title}</a>

I am not sure why are you using @ format= here.

Thanks,

Kiran Vedantam

[Sravan_Kumar_Si]

model.title contains one of the two values - "Back to {0}" or "Back" <sly data-sly-test.title="${model.title}"/>

My objective is if the place holder {0} is there in the value of title then replace it otherwise simple use the value of title.

[Sravan_Kumar_Si · Accepted solution]

Hi @Sravan_Kumar_Si 

I would suggest if you already have a support script(Sling Model or Use API), better write logic in the script itself like below. This will make you view simple ans clean.

Support Script:

model.title = title.contains("{0}") ? title.replace("{0}", currentPage.parent.title) : title; (JavaScript Use API example, you can try similar in Java Use API or Sling Model)

HTL:

<a>${title}</a>

-AG

[Sravan_Kumar_Si · Accepted solution]

Thanks for your suggestion. But I wanted to know why the way I tried did not work?

[Sravan_Kumar_Si · Accepted solution]

Hi Anurag, I had a solution as you mentioned. In my case, title comes from a different model only to fetch from dictionary. I was trailing for a short and simple HTL expression that does the job instead of writing a model for one line functionality.

[Anudeep_Garnepudi · Accepted solution]

Please check my other comment with one line HTL solution

[#9]

Hi @Sravan_Kumar_Si 

1. We can not use options(@) in ternary operator which will results to an Exception (<a>${'{0}' in title ? title @ format=currentPage.parent.title : title}</a>)
2. Even if you use if use it at the end, it will be ignored an @option will always execute <a>${!('{0}' in title) ? title : title @ format=currentPage.parent.title}</a>

If you want to do it from view(HTL), the best option is having two expressions

<a>${'{0}' in model.title ? model.title : "" @ format=currentPage.parent.title}  ${!('{0}' in model.title) ? model.title : ""}</a>

If you want your view(HTL) to be simple and more readable, as I mention earlier write the logic in support script.

Hope you got the Answer.

-AG

[Sravan_Kumar_Si]

Hi @Sravan_Kumar_Si,

Here is the working code:

<sly data-sly-test.title="${model.title}"/> 

<a>${'{0} in title' @ format= currentPage.getParent.getTitle ? currentPage.getParent.getTitle : title} </a>

Put the {0} and the other strings in single quotes.

Thanks,

Kiran Vedantam.

[Sravan_Kumar_Si]

Hi Kiran, Thanks for getting back but this did not solve my issue. '{0}' in title - here, I want to check for the existence of substring '{0}' in value of title variable. If I enclose every thing inside '' then "in" is not considered as an operator and "title" is not taken as value of the variable.

[Manjunath_K]

Hi @Sravan_Kumar_Si 

Please use the below mentioned format option syntax.

<sly data-sly-test.containsText="${'{0}' in title}">
     ${title @format = currentPage.parent.title}
</sly>

<sly data-sly-test="${!containsText}">
     ${title}
</sly>

Hope this helps!

[Manjunath_K]

@Sravan_Kumar_Si 

please try adding conditions as mentioned below.

<sly data-sly-test.title="${model.title}"/> 

<sly data-sly-test.containsText="${'{0}' in title}">
     ${title @format = currentPage.parent.title}           <!-- 'parent page title' in title -->
</sly>

<sly data-sly-test="${!containsText}">
     ${title}                                                                    <!-- title -->              
</sly>