Why is the current date in my Firebase transaction always zero?

Question

This is how DB presented over Firebase

Parent
      Match
           User 1
                 Opponent : User 2
                 State    : "NotReady"
           User 2 
                 Opponent : User 1
                 State    : "NotReady"

I am trying to update values State(each user separately) using RunTransaction.

What I tried to do:

• Make sure the item is not deleted (not nil / null)
• If it exists, update the value.
• if it does not exist - manipulate the user interface

• if he suddenly left - abort the transaction (Possible condition - if two closing events are executed simultaneously, one update "Status" and the other deletes all keys (removeValue)

   let path =  "Parent/Match/User 1/state"
  
   let futureRef = Firebase(url: path)
           futureRef.runTransactionBlock({
      (currentData:FMutableData!) in
      let value = currentData.value as? String
  
      if value != nil  {
          currentData.value = "Ready"
  
          return FTransactionResult.successWithValue(currentData)
      }
  
          return FTransactionResult.abort()
  
      }, andCompletionBlock: {
          // Completion Check
          (error:NSError!, success:Bool, data:FDataSnapshot!) in
  
          if error == nil && success && data.value as! String == "Ready"
          {
              //Value is not null(not removed) and he is ready
                ManipulateUI()
  
          }
          else 
        {
  
          //Value deleted
         }
  
  
          }
      )
  

But for some reason - I get currentData, which nilgoes directly to Abort. Any suggestions? Thanks!!!

Answer 1

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