topic Re: SAP Developer Code Challenge – ABAP Mustache (Week 3) in Application Development and Automation Discussions

SAP Developer Challenge – Open-Source (Week 3)

Mamikee — Wed, 07 Jun 2023 13:13:22 GMT

This discussion thread is to submit your solution for Week 3 of the May 2023 Developer Challenge - Open-Source ABAP .

Week 3 – ABAP Mustache https://github.com/sbcgua/abap_mustache

Mustache is a big deal in the web development world. It's a template syntax that doesn't use logic, letting you whip up a text template, stick some tags in there, and then swap those tags with dynamic content straight from your program – anything from individual values to full lists of values. Mustache is a real champ when it comes to generating bits of HTML (or entire pages), or pretty much any other text you want to template. Plus, the Mustache syntax is used in a huge number of languages.

Community member @atsy has put together an implementation of the mustache processor in ABAP, and named it - you guessed it - ABAP Mustache. So, for your third-week challenge, we're putting the spotlight on the ABAP Mustache project. Your challenge is to simply create an ABAP application which leverages this framework and outputs some data to the console. How you use ABAP Mustache is totally up to you - it's your chance to get creative and show us what you've got. Whether you want to keep it simple or go all out is completely your call. Once you're done, all you need to do is share your working ABAP code and give us a screenshot of the output in the console to prove you've nailed the challenge.

Resources

Mustache template engine implementation on ABAP-https://blogs.sap.com/2017/02/17/mustache-template-engine-implementation-on-abap/

❗You will get credit for this weeks’ challenge by posting in this discussion thread the working ABAP code (a screen shot of your code, or via a link to your GitHub repo), and showing a screen shot of the output in the console. To give you an idea, here's an example screenshot below.

Have Fun 🤩

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

former_member141446 — Wed, 24 May 2023 18:47:27 GMT

Hello!

I am trying to test a similar class to the example above. However, when I run it, I get the following dump:

"Access using a 'ZERO' object reference is not possible."

Below is my code:

Does anyone here know what the problem could be?

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

thomas_jung — Wed, 24 May 2023 19:46:53 GMT

Here is my solution: abap-hello-world/zcl_mustache_tpj.clas.abap at main · jung-thomas/abap-hello-world · GitHub

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

thomas_jung — Wed, 24 May 2023 20:20:28 GMT

It's your shortcut for newline - the c_nl that is the issue. You never create an instance of that object you just type like cl_abap_char_utilities. So, it's not a valid object reference. Change that to the full, original object or create a specific newline shortcut like so:

DATA(c_nl) = cl_abap_char_utilities=>newline.

Have a look at the solution here: abap-hello-world/zcl_mustache_test_guilherme.clas.abap at main · jung-thomas/abap-hello-world · GitHub

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

Gurpreet_Jaspal — Thu, 25 May 2023 04:12:10 GMT

Seems I have to convert the macros to methods to activate the classes in ABAP cloud environment. Working with chatGPT to achieve that. @thomas_jung pls let me know if there is any easy way I can use this project in ABAP cloud.

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

NooruBohra — Thu, 25 May 2023 05:28:53 GMT

Hi,
Same issue with me. Most of us don't have on prem system. What can be done? 🤔

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

thomas_jung — Thu, 25 May 2023 06:09:47 GMT

There are two versions of library available in GitHub via different branches. For ABAP Cloud make sure you are pulling the “steampunk” branch.

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

thomas_jung — Thu, 25 May 2023 06:10:06 GMT

There are two versions of library available in GitHub via different branches. For ABAP Cloud make sure you are pulling the “steampunk” branch.

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

Gurpreet_Jaspal — Thu, 25 May 2023 06:30:45 GMT

Saw this very late after making all the changes. 😑
Thanks for sharing this

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

Gurpreet_Jaspal — Thu, 25 May 2023 06:32:51 GMT

Hi Mamikee,
Added my code zcl_scc0523_mustache_app to the same repo.
Below is the test result

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

Gurpreet_Jaspal — Thu, 25 May 2023 06:34:22 GMT

Adding the link here for reference
https://github.com/sbcgua/abap_mustache/tree/steampunk

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

Tomas_Buryanek — Thu, 25 May 2023 06:43:47 GMT

Oh, you made ABAP Cloud version yourself 🙃 You should get bonus point ⭐

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

Gurpreet_Jaspal — Thu, 25 May 2023 06:48:44 GMT

Wasn't much to change tbh, Just a few macros changed as methods and "DEFINE FIELD" syntax to be modified with cl_abap_datadescr.
I actually gave up but was bored at work so thought to work with ChatGPT and made the changes. 😀

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

JaimeRodriguez — Thu, 25 May 2023 10:48:13 GMT

My solution

https://github.com/jrodriguez-rc/abap-code-challenge/blob/main/src/zcl_challenge_mustache.clas.abap

Re: SAP Developer Code Challenge – Open-Source ABAP (Week 3)

former_member141446 — Thu, 25 May 2023 12:11:44 GMT

Thank you very much, Thomas! 👍

Re: SAP Developer Code Challenge – ABAP Mustache (Week 3)

Tomas_Buryanek — Thu, 25 May 2023 12:42:08 GMT

Hello,

for this challenge someone already pulled ABAP Mustache repository into my instance of SAP BTP Cloud trial. But it was main branch which can not be activated on ABAP on Cloud (no SAP GUI). So I unlinked Z package, deleted objects and pulled "steampunk" branch of the repository, which is compatible with ABAP Cloud . Cheers mate 😉

Here is my implementation class. I tried to use ABAP Mustache to fill a demo "HTML e-mail template":

https://github.com/TBuryanek/SAP-Developer-Code-Challenge-Open-Source-ABAP/blob/main/src/zcl_tb_dev_challenge_week3.clas.abap

And screenshot of console output:

Valid HTML page output: