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I've got 2 directories on my root:

/images/ <-- with user's images /media/ <-- with system ( and components ) images

The global parameter for image root is set to media but I want to decide via the field where to find my image.

The XML for the admin form is 

<field id="contest_image" name="contest_image" type="NewMedia" required="false" imgroot="images" directory="" label="Contest_image" description="contest_image_Desc" preview="true" exclude="" stripext="0" />

I've duplicated the original field in NewMedia for avoiding confusion and set this one with:

if ($this->value && file_exists(JPATH_ROOT . '/' . $this->value)) { $folder = $this->imgroot . '/'.$this->directory; } elseif (file_exists(JPATH_ROOT . '/' . $this->imgroot . '/' . $this->directory)) { $folder = $this->imgroot . '/'.$this->directory; } else { //$folder = ''; $folder = $this->imgroot ; }

Can anyone help me ?

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1 Answer 1

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In your Model, you have to override getForm method to set values dynamically. Make sure you are extending your Model with either JModelForm or JModelAdmin. Once done, try following code:

public function getForm($data = array(), $loadData = true) { $form = $this->loadForm('com_yourcomponent.yourformname', 'yourformname', array('control' => 'jform', 'load_data' => $loadData)); if (empty($form)) { return false; } if (condition) { $form->setFieldAttribute('contest_image', 'directory', 'Your Value if condition is true'); } else { $form->setFieldAttribute('contest_image', 'directory', 'Your Value is false'); } return $form; }
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