How to configure JFB to fetch article meta description for og:descrip

Adding to this thread we are getting an error while configuring the Social - Meta Objects. Attached the screenshot for your reference

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We have specific requirement to fetch og:description from Article meta description, could you explain how to configure the plugin to fetch from the article meta description instead of article content. Also, we need to implement the condition if Article meta description not available we need to bring from the article content.

To use the meta description, you'll need to create an Open Graph 'Object', which you can then override the settings for how the article data is used. To do that:
* Go to the Social Graph admin area in JFBConnect
* Click Objects
* Create a new "Joomla Article" object type
* Give it a name on the left so you can recognize it and publish it.
* On the right, select a category you want this object to apply to. If you want all articles to use the meta description, leave it as 'Root'.
* Change the Description type to Meta

Publish it and you should be good to go. To test an article, check the raw HTML or use the Facebook URL Debug Tool .

I hope that helps,
Alex