[TYPO3-mvc] CObjectViewHelper

[Bastian Waidelich]

Fernando Arconada wrote:

Hi Fernando,

> Anyone has examples about cobjectViewHelper? when is the constructor 
> called?

The constructor is there mostly to allow us to do some dependency 
injection in the unit tests.
When used in a Fluid template, the constructor will be called without 
any arguments - But you shouldn't have to care about this anyways.

Here a simple example:
Imagine you have following cObject anywhere in your TypoScript setup:

lib.myObject = COA
lib.myObject {
	10 = TEXT
	10.current = 1
	10.case = upper
}

in your template you'll write

<f:cObject typoscriptObjectPath="lib.myObject">Hello world</f:cObject>

This should output
HELLO WORLD

But you could also use arrays or objects as input:

in your TS setup:

lib.customerRenderer = COA
lib.customerRenderer {
	10 = TEXT
	10.field = firstName
	20 = TEXT
	20.field = lastName
}

and

<f:cObject 
typoscriptObjectPath="lib.customerRenderer">{customer}</f:cObject>

with the "currentValueKey" attribute you can specify which property of 
the object (respectively which key of the array) will be available as 
current value of the CObject:

Taken the TS setup from above:

lib.myObject = COA
lib.myObject {
	10 = TEXT
	10.current = 1
	10.case = upper
}

You could now write:

<f:cObject typoscriptObjectPath="lib.myObject" 
currentValueKey="firstName">{customer}</f:cObject>

And it should output the first name of the customer object upper cased.

BTW: with the latest revision, you can also use this view helper with 
the inline notation: {f:cObject(typoscriptObjectPath: 'lib.myObject', 
data: customer, currentValueKey: 'firstName')}

Note: I didn't test these examples, if you encounter any problems, let 
us know!

You might want to check out the "viewhelpertest" extension from 
https://svn.typo3.org/TYPO3v4/CoreProjects/MVC/viewhelpertest/
It comes with a lot of example use cases and we're trying to keep it up 
to date.

Best,
Bastian