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IndexedDb - Check table exists and contains data

Using IndexedDB when my app first runs I populate it with some data, I want to ensure that when the database and tables are created that they do not already exists.

Can I query the length of a table to see if it contains and data in JavaScript?

Solution

  • We can use the objectStoreNames property of IndexDB to check the existence of an ObjectStore.

    var db_object, object_store;
if( !db.objectStoreNames.contains(currentobjectstore) )
{
  db_object =  i_db.createObjectStore(currentobjectstore, {autoIncrement:true} );
 object_store = db.transaction(currentobjectstore, 'readwrite').objectStore(currentobjectstore);
} else {
 object_store = db.transaction(currentobjectstore, 'readwrite').objectStore(currentobjectstore);
}