Firebase.update failed : first argument contains undefined in property

Question

I have a simple Firebase function that updates some data. However, the interpreter says that the first argument contains \"undefined\" in property \'users.tester1\'. Can somebod

Answer 1

Like said above, you need all undefined values to be null if you want them to save as empty values in firebase.

I take this approach to correct all nested values.

  //to search and replace    
    const replaceAll  =(s="",f="",r="")=>  s.replace(new RegExp(f.replace(/[-\/\\^$*+?.()|[\]{}]/g, '\\$&'), 'g'), r)

    //to save 
   firebase.database().ref(`path`).update(JSON.parse(replaceAll(JSON.stringify(val),"undefined","null")))