Node Js Php Serialize
Tl;dr Untrusted data passed into unserialize() function in node-serialize module can be exploited to achieve arbitrary code execution by passing a serialized JavaScript Object with an Immediately invoked function expression (IIFE). The Bug During a Node.
Node Js Web Server Example
Because Waterline queries return models, not plain javascript objects, they have additional properties and functions on them. One of these is an overridden toJSON() function which removes attributes that have not been populated. What seems to be happening here is that you are attaching objects to a parent model which doesn't know it has children that have been populated so it strips off the values. The reasoning behind this is so that if you query for all Users and don't populate Rooms you don't get an incorrect result showing an empty rooms array. I'm not sure what all you are manipulating here but the reason it works if you _.cloneDeep is because it removes the custom toJSON field.
I am using html2pdf class to generate pdf. In my problem its generate pdf for the html code but it not give the dialog box option to download that pdf. Plz help my cose is following. 
Dec 11, 2015 Download html2pdf for free. HTML2PDF is a PHP class using FPDF for the PHP4 release, and TCPDF for the PHP5 release. It can convert valid HTML and xHTML to PDF. HTML2PDF is a HTML to PDF converter written in PHP. It allows the conversion of valid HTML 4.01 in PDF format, and is distributed under OSL. This library has been designed to handle mainly TABLE intertwined to generate invoices delivery. Oct 08, 2013 Download HTML 2 PDF - a PHP script for free. Get a HTML text and generate a PDF file to make it printer-friendly. This PHP script is based upon FPDF PHP script (www.fpdf.org). For those of you looking for the latest release of this code try googling html2pdf and the website with the matching name and a.fr for france is the one.
Node Js Commands
This is the recommend strategy when you are mutating a parent object from a query like this.