Feature #70036
closed
Fluid: Custom fallback if partial is not available
100%
Description
In Extbase I have a scenario where I have to define partials based on an element type. If the partial is not available, it has to fall back to a default partial.
Imagine the following:
There are categories and items for this category. The detail view of a category's items should be based on the category. So I have the following detail template:
<h1>{item.name}</h1>
<h2>Block 1</h2>
<f:render partial="Category/[CategoryIDorName]/DetailBlock1" />
<h2>Block 2</h2>
<f:render partial="Category/[CategoryIDorName]/DetailBlock2" />
Because there are some categories that share a default setup and some that are different from the others, I would like to have the following:
<h1>{item.name}</h1>
<h2>Block 1</h2>
<f:render partial="Category/[CategoryIDorName]/DetailBlock1" fallback="Category/Default/DetailBlock1" />
<h2>Block 2</h2>
<f:render partial="Category/[CategoryIDorName]/DetailBlock2" fallback="Category/Default/DetailBlock2" />
This cannot be solved by the existing path overlay feature, as it would try to get the partial from a folder with the same name.
Currently I solved this by using a custom ViewHelper, wrapped in an if-statement:
<f:if condition="{krbu:PartialExists(partial: 'Category/{item.id}/DetailBlock1')}">
<f:then><f:render partial="Category/{item.id}/DetailBlock1" arguments="{_all}" /></f:then>
<f:else><f:render partial="Category/Default/DetailBlock1" arguments="{_all}" /></f:else>
</f:if>
But I think, that adding a simple fallback argument to the existing render ViewHelper would be the cleanest solution and I think, this might be of use for a lot of implementers.
Unfortunately I could not understand the view/partial flow very good yet without moderation, so I wasn't able to just create a patch for it.
Updated by Claus Due over 8 years ago
The "easy" marker in complexity is a bit misleading, but I digress ;)
There is one way you can do this currently but it only works for sections, not partials:
<f:alias map="{myVar: '{f:render(section: \'SectionName\')}'}">
<f:if condition="{myVar}">
<f:else><f:render section="Fallback" /></f:else>
</f:if>
</f:alias>
And once standalone Fluid is integrated in TYPO3, thanks to two new features:
1. Partials can now be rendered as `optional` like sections could before.
2. When an optional section or partial doesn't render anything, the tag content of <f:render> is rendered instead.
Because of this, you can soon do:
<f:render partial="MyPartial" optional="1">
<f:render partial="MyOtherPartial" optional="1">
<f:render partial="Fallback" />
</f:render>
<f/render>
...and keep going to any depth you desire, use anything as fallback rendering.
I'm guessing this issue can be closed ;)
Updated by Gerrit Code Review over 8 years ago
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Updated by
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Updated by Anonymous about 8 years ago
- Status changed from Under Review to Resolved
- % Done changed from 0 to 100
Applied in changeset 8b693daac0cc381f10c74bc5d78b2448f55111f3.
Updated by