Using rest and freemarker to build components
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Using REST and Freemarker to Build Components. “let’s make something”. “I want to show the most recent blog article and when it was posted”. Ok, no problem. First get the message from REST. /topics/style/blog/ recent?page_size =1 And assign that to a freemarker variable

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Using REST and Freemarker to Build Components

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Using rest and freemarker to build components

Using REST and Freemarker to Build Components

“let’s make something”


I want to show the most recent blog article and when it was posted

“I want to show the most recent blog article and when it was posted”

Ok, no problem. First get the message from REST.

/topics/style/blog/recent?page_size=1

And assign that to a freemarker variable

<#assign recent= rest(“/topics/style/blog/recent?page_size=1”).messages />


No wait i only want it to come from my blog it s called bloggy and it s the best

“No,wait! I only want it to come from my blog. It’s called “Bloggy” and it’s the best

Still no problem. We’ll just change our REST call to be specific to one board.

<#assign recent = rest(“/boards/id/bloggy/topics/recent?page_size=1”).messages />

http://lithosphere.lithium.com/restapi/vc/boards/id/lithiumblog/topics/recent?page_size=1


What s that restapi vc thing

“What’s that ‘/restapi/vc’ thing?

If you want to see your pure xml response in the browser you need to have “restapi/vc” in the url. If you are making the call in Freemarker, we take care of that part for you.

This:

http://lithosphere.lithium.com/restapi/vc/boards/id/lithiumblog/topics/recent?page_size=1

Is the same as this:

<#assign myCall = rest(“/boards/id/lithiumblog/topics/recent?page_size=1”) />


Using rest and freemarker to build components

Now let’s write out our article title and date

<a href=“${recent.message.@view_href}”>

${recent.message.subject}</a>

<span class=“post-time”>

${recent.message.post_time}</span>


What kind of date is that i can t read that

“What kind of date is that?? I can’t read that!”

Welcome to Bloggy2013-11-18T17:34:08+00:00

Good point, you can get more user friendly info by adding a parameter to your rest call

?restapi.response_style=view


Using rest and freemarker to build components

<#assign recent = rest(“/boards/id/bloggy/topics/recent?page_size=1&restapi.response_style=view”).messages />

This changes the response for post time from this:

<post_time type="date_time">2013-11-18T17:34:08+00:00</post_time>

To this:

<post_time type="date_time" view_date="12-02-2013" view_time="11:13 AM" view_friendly_date="yesterday">2013-12-02T19:13:12+00:00</post_time>


Using rest and freemarker to build components

Now we have:

<a href=“${recent.message.@view_href}”>

${recent.message.subject}</a>

<span class=“post-time”>

${recent.message.post_time.@view_friendly_date}</span>

Welcome to BloggyYesterday

Yay, I love it.

Let’s test it!


Aaahhhhhh

Aaahhhhhh!


What happened

What Happened?

We used @view_friendly_date without ever checking that it existed.


Fix it

“FIX IT!!”

<a href=“${recent.message.@view_href}”>

${recent.message.subject}</a>

<span class=“post-time”>

<#if recent.message.post_time.@view_friendly_date[0]??>

${recent.message.post_time.@view_friendly_date}

<#else>

${recent.message.post_time.@view_date}

</#if>

</span>

Gives you:


Yay it s perfect

“Yay, it’s perfect”

Happy Dance


Tips for development

Tips for Development

  • Always check the XML first

  • Test for variables before you use them. De-FENCE, De-FENCE!

  • Test as both an admin user and a regular user- permissions will kill you –

  • “unit test”

  • Versions tab is your friend

  • Think about performance


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