title: mongoimport with additional fields not present in CSV
body: <p>I've a product feed collection of different category of products.
  I get these feeds as CSV file and using mongoimport I'm importing data into MongoDB.</p>
  
  <p>My problem is now I want to add additional fields while using mongoimport, i.e. 25 fields are there in CSV file but I want to add two more columns with static value for both of them.</p>
  
  <p>For example,</p>
  
  <blockquote>
    <p>25 fields + "category":"xyz" , "version":123456</p>
  </blockquote>
  
  <p>For each category there is a distinct CSV file. So 35 category, 35 CSV files, and I want 35 different <b>category</b> and <b>version</b> values for each.</p>
  
  <p>Programmatically it is possible to read CSV and while importing add those additional fields.
  Is there a way with mongoimport? </p>