someone pls reply ,,its pretty urgent for me

someone please reply..
its pretty urgent for me

I m not able to pass where parameter while calling query service in angular js??

I need to call a read service with parameter other than _id . but i always get error
'Illegal character in path at index'

How to check if user has logged in for the first time in the app?

I have a list of cars which I populate from database. I want to filter it when user types something in the search box above it?