Exclude caching cusotm module by Magento 2 built in Full page cache(FPC problem)

Question

I am having a strange issue regarding built-in FPC in magento2.

I have a custom module, in its index controller, it just renders a phtml file. This phtml file shows some information retrieving it from a custom table. This is just a simple thing that I have done here.

The problem is when I disable FPC in magento 2 the contents are displayed correctly, but when I enable the FPC than it renders the blank page .

See below two screeshot for the scenario analysis.

Ok so what I have tried till now.

I read somewhere that including below code on block construct function excludes the block from FPC.

public function __construct(){
$this->_isScopePrivate = true;
} 

But it didn't worked.

What i want?

I want to exclude my module from FPC.

Can anyone help me or enlight with some insights?

Thanks.

Answer 1

You can disable block to cache by layout xml code.

See below example code for disable block from cache.

<block class="\Magento\Framework\View\Element\Template" template="sample:module::sampletemplate.phtml" name="sampleblock" cacheable="false" />

cacheable="false" is use for that. you can disable like this.

Answer 2

From

• http://devdocs.magento.com/guides/v2.1/config-guide/cache/cache-priv-over.html

cacheable="false" will create uncacheable page, not just block.

For private content you should be using approach described in here:

• http://devdocs.magento.com/guides/v2.1/config-guide/cache/cache-priv-priv.html
• this page also says that using _isScopePrivate is deprecated.

You can check my answer also here why not to use cacheable="false" a bit more in details: https://magento.stackexchange.com/a/163875/4899