CODEWITHSUNDEEP
javascriptindexeddb
shaswat kumar
shaswat kumar

Reputation: 349

Accessing a variable set in cursor outside the cursor in IndexedDb

I want to print the value of variable "set" that I have set inside the cursor, outside my cursor objct.

      request.onsuccess = function(e){
      var set = 0;
      var transaction = db.transaction(['List'], "readonly");
      var objectStore = transaction.objectStore('List');

      objectStore.openCursor().onsuccess = function(event) {
        var cursor = event.target.result;
        if(cursor) {
        // console.log(cursor.value.Name);
        if (cursor.value.Name == $('#card').val())
        {
          console.log("aisa kabhi hoga hi nahi");
          set = 1;
        }

          cursor.continue();
        } 
        else 
        {
          console.log('Entries all displayed.');
          if (set == 0)
          {
             set= ippp();
             console.log(set);

          }
        }
      };
      console.log(set);
      }

When I print my set variable inside the cursor as shown "right data is printed".

But when I try to print the data of variable "set" outside cursor the value that I declared initially gets printed. "How is it possible as I am resetting the value of variable in my cursor"

My question is how can I access the value that I have set to variable "set" inside the cursor, outside of cursor object.

Upvotes: 1

Views: 223

Answers (1)

Josh
Josh

Reputation: 18690

You need to learn about asynchronous programming before using indexedDB. The real answer is to go and learn this.

However, as a quick answer, you can use a callback function.

function outerFunction(myCallbackFunction) {
  // do stuff
  request.onsuccess = function(event) {
    var cursor = event.target.value;

    var value = cursor.value;

    // Here is the whole trick to getting the value out. Pass the value to the 
    // callback function.
    myCallbackFunction(value);
  };
}

// Then to call it, you do something like this, where 'oncompleted' 
// is the name of the callback function

outerFunction(function oncompleted(value) {
  console.log('The value is', value);
});

Upvotes: 1

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