Split detail view in seperate content areas - typo3

Question

How can I split the detail view in seperate content areas?
I configured 2 content areas as backend layouts:
backend_layout {
colCount = 1
rowCount = 2
rows {
1 {
columns {
1 {
name = News-Head
colPos = 0
}
}
}
2 {
columns {
1 {
name = News without Head
colPos = 22
}
}
}
}
}
and 1 News layout for the single view with head only:
tx_news.templateLayouts {
20 = Detail (Head only)
}
after that I inserted the 2 plugins in his associated content areas and select the news layout 20 on a single plugin.
Now I inserted a switch inside the Fluid template detail.html
<f:if condition="{settings.templateLayout} == 20">
<f:then>
<h1>
<f:if condition="{newsItem.alternativeTitle}">
<f:then>
<n:titleTag>
<f:format.htmlentitiesDecode>{newsItem.alternativeTitle}</f:format.htmlentitiesDecode>
</n:titleTag>
</f:then>
<f:else>
<n:titleTag>
<f:format.htmlentitiesDecode>{newsItem.title}</f:format.htmlentitiesDecode>
</n:titleTag>
</f:else>
</f:if>
</h1>
</f:then>
<f:else>
<div class="news news-single">
<div class="article" itemscope="itemscope" itemtype="http://schema.org/Article">
<div class="news-col">
<n:renderMedia news="{newsItem}" imgClass="img-responsive" videoClass="video-wrapper" audioClass="audio-wrapper">
<f:render partial="Detail/MediaContainer" arguments="{media: newsItem.media, settings:settings}" />
</n:renderMedia>
</div>
<div class="news-col">
<f:format.html>{newsItem.bodytext}</f:format.html>
</div>
</div>
</div>
</f:else>
</f:if>
But only the output of else branch works. Why?
Thanks in advance for help.

Answer 1

It was my fault! I totally forgot to pass-through my page variable content_news_single from my main fluid template to my partial.
TS setting:
page.10 = FLUIDTEMPLATE
page.10 {
# ....
variables{
content_main < styles.content.get
content_news_single < styles.content.get
content_news_single.select.where = colPos = 22
}
}
And here I forgot the definition to pass-through the variable content_news_single
<div class="page">
<f:render partial="header" arguments="{content_border:content_border}" />
<f:render partial="body" arguments="{content_main:content_main,content_news_single:content_news_single}" />
<f:render partial="footer" />
</div>
Also I never inserted {newsItem.title}
<f:if condition="{settings.templateLayout} == 20">
<f:then>
<n:format.nothing>
<n:excludeDisplayedNews newsItem="{newsItem}" />
<f:if condition="{newsItem.alternativeTitle}">
<f:then>
<n:titleTag>
<f:format.htmlentitiesDecode>{newsItem.alternativeTitle}</f:format.htmlentitiesDecode>
</n:titleTag>
</f:then>
<f:else>
<n:titleTag>
<f:format.htmlentitiesDecode>{newsItem.title}</f:format.htmlentitiesDecode>
</n:titleTag>
</f:else>
</f:if>
<f:render partial="Detail/Opengraph" arguments="{newsItem: newsItem, settings:settings}" />
</n:format.nothing>
<h1>
{newsItem.title}
</h1>
</f:then>
<f:else>
<div class="news news-single">
<div class="article" itemscope="itemscope" itemtype="http://schema.org/Article">
<div class="news-col">
<n:renderMedia news="{newsItem}" imgClass="img-responsive" videoClass="video-wrapper" audioClass="audio-wrapper">
<f:render partial="Detail/MediaContainer" arguments="{media: newsItem.media, settings:settings}" />
</n:renderMedia>
</div>
<div class="news-col">
<f:format.html>{newsItem.bodytext}</f:format.html>
</div>
</div>
</div>
</f:else>
</f:if>