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Calling 'insert' in a room database does not complete the transaction

By : user2176540
Date : October 14 2020, 02:21 PM
Hope that helps TL;DR
Your code seems to be working fine. Don't get confused by the temporary files SQLite creates to operate.
code :

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Phonegap wait for database transaction to complete

By : Sebastian Scholz
Date : March 29 2020, 07:55 AM
it should still fix some issue I'm creating a Phonegap application that will perform differently on first run. The way that I am detecting the first run is by seeing of one of the database tables exists. As you can probably tell from the code below, I am checking for the error that is (probably) indicating that the table already exists, thus proving that this is not the application's first run. , You need to write it in callback form:
code :
var dataBaseExists(yep, nope) {
  database.transaction(function(tx) {
    tx.executeSql('CREATE TABLE GLOBAL (uid, property, value)');
  }, function(){
    if (yep) {
      yep.apply(this, arguments);
  }, function(){
    if (nope) {
      nope.apply(this, arguments);

var itDoes = function() {

var itDoesNot = function() {
  console.log("what a pity");

databaseExists(itDoes, itDoesNot);

Rollback the transaction after calling transaction.complete()

By : Sumit Waghmode
Date : March 29 2020, 07:55 AM
around this issue You can have nested scopes. All scopes must complete for the transaction to complete as well. Scope != transaction.
So the inner scope could complete and the outer scope could rollback. That would rollback the transaction in effect.

Room database Insert or update but keep a database field?

By : Francine D
Date : March 29 2020, 07:55 AM
Any of those help Can be done by two approach
First One:- Before insert Kafane you query getSingleKafana(name: String): Single and get it from the database if it's available and get the favorite status and set this favorite field to newly come KAFANA object from API.

How to insert list of objects in object box database in android ? Like Room database

By : juric98
Date : March 29 2020, 07:55 AM
Any of those help Yes, this works exactly as you suggest. It's also more efficient than putting each one-by-one (all objects in the list will be put inside a single transaction).

Insert value in Room database

By : user3732182
Date : March 29 2020, 07:55 AM
wish help you to fix your issue It looks like you are not initialising mcityViewModel in onCreate(Bundle savedInstanceState)
Please add this line in onCreate method:
code :
protected void onCreate(Bundle savedInstanceState) {
    // -------> Add this line here <-------
    mcityViewModel = new ViewModelProvider(this).get(CityViewModel.class);

    ImageButton fab = findViewById(R.id.fab);
    fab.setOnClickListener(new View.OnClickListener() {
      public void onClick(View view) {
        String cityName = cityNameWeakReference.getText().toString();
        City cityItem = new City(cityName, 5.0,4.0);
        Snackbar.make(view, cityName+cityItem, Snackbar.LENGTH_LONG)
            .setAction("Action", null).show();
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