Typeerror: Cannot Read Property 'todate' Of Undefined

I have a firebase project, I am getting the below error log when running a firebase function, below are the error log and the code. the error is Cannot read property 'toDate' of u

Solution 1:

In your class instead of:

this.dateTime = dateTime.toDate().getTime()

do this.dateTime = dateTime && dateTime.toDate().getTime()

(or even safer: this.dateTime = dateTime && dateTime.toDate && dateTime.toDate().getTime())

OR you could solve it by using some default value like

this.dateTime = (dateTime || defaultValue).toDate().getTime()