print returned `Job` from Room

print returned `Job` from Room

Content Index :

may help you . Definitely it won't gonna work and give you the compilation error as you are using coroutines viewModelScope.launch which returns Job.
What would I suggest you to add one more method in view model class which just returns the LiveData
class AppViewModel(application: Application) : AndroidViewModel(application) {
    private val assignments = MutableLiveData<List<Assignment>>()
    fun loadAllByIds(userIds: IntArray) = viewModelScope.launch(Dispatchers.IO) {

    fun getAssignments(): MutableLiveData<List<Assignment>> {
        return assignments
appViewModel.getAssignments().observe(this, Observer { assignments -> 
    printAll(assignments) // You can pass assignments object to your AssignmentsAdapter
class AppRepository(private val assignmentDao: AssignmentDao) {
    fun loadAllByIds(userIds: IntArray): List<Assingment> {
        return assignmentDao.loadAllByIds(userIds)

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Livedata returned by Room won't be triggered after GC

Tag : android , By : jaredsmiller
Date : March 29 2020, 07:55 AM
To fix the issue you can do After post this issue to the google issue tracker(https://issuetracker.google.com/issues/114833188), I got reply:

Django - Room model needs to have a selection of many room types. One room must have at least one room type from the pre

Tag : django , By : Kilimanjaro
Date : March 29 2020, 07:55 AM
I wish this help you You should change your Room model. Also your property will be deleted if the user is deleted. Are you sure you want this?
class Room(models.Model):
  property = models.ForeignKey(Property)
  name = models.CharField(max_length=250)
  description = models.TextField(max_length=800)
  image = models.ImageField(upload_to='room_images/', blank=False)
  bar_rate = models.IntegerField(default=0, blank=False)

  SGL = 1
  TWN = 2
  DBL = 3
  TRPL = 4
  STND = 5
  DLX = 6
  EXET = 7
  SPR = 8
  SPR = 9
  JS = 10
  ONEBDR = 11
  TWOBDR = 12
  FOURBDR = 14
  FIVEBDR = 15
  SIXBDR = 16

    (SGL, 'Single'),
    (TWN, 'Twin'),
    (DBL, 'Double'),
    (TRPL, 'Triple'),
    (STND, 'Standard'),
    (DLX, 'Deluxe'),
    (EXET, 'Executive'),
    (SPR, 'Superior'),
    (JS, 'Junior Suite'),
    (ONEBDR, 'One Bedroom'),
    (TWOBDR, 'Two Bedroom'),
    (THREEBDR, 'Three Bedroom'),
    (FOURBDR, 'Four Bedroom'),
    (FIVEBDR, 'Five Bedroom'),
    (SIXBDR, 'Six Bedroom'),
    (SEVENBDR, 'Seven Bedroom'),
  room_type = models.IntegerField(choices=ROOM_TYPES)
  max_occupancy = models.IntegerField(default=1, blank=False)
  extra_beds = models.IntegerField(default=0, blank=True)
  price_per_exra_bed = models.IntegerField(default=0, blank=True)
  is_breakfast_included = models.BooleanField(default=False)
  room_type_quantity = models.IntegerField(default=0, blank=False)

  def __str__(self):
    return self.name

(Room Database)fields which are not returned by the query error

Tag : java , By : hyperNURb
Date : March 29 2020, 07:55 AM
wish of those help You are trying to tell Room to build a ClassEntity object from a single String (for each query). It is saying that it cannot safely do this.
The fix is to return a List as oppsed to a List.
public interface Dao {

    @Query("SELECT monday FROM  ClassEntity WHERE id_of_a_group = :id")
    List<String> findFromMonday(String id);

    @Query("SELECT tuesday FROM  ClassEntity WHERE id_of_a_group = :id")
    List<String> findFromTuesday(String id);

    @Query("SELECT wednesday FROM  ClassEntity WHERE id_of_a_group = :id")
    List<String> findFromWednesday(String id);

    @Query("SELECT thursday FROM  ClassEntity WHERE id_of_a_group = :id")
    List<String> findFromThursday(String id);

    @Query("SELECT friday FROM  ClassEntity WHERE id_of_a_group = :id")
    List<String> findFromFriday(String id);

    @Query("SELECT id_of_a_group FROM  ClassEntity")
    List<String> getIdOfAllGroups();

    void insert(ClassEntity group);

    void update(ClassEntity group);

    void delete(ClassEntity group);
public abstract Array[] getIdOfAllGroups();
@Query("SELECT count() FROM ClassEntity")
int getItemsInDatabase();
    database = Room.databaseBuilder(this, Database.class, "database")
    if (database.classDao().getItemsInDatabase() < 1) {
        ClassEntity myClassEntity = new ClassEntity();
        myClassEntity.id_of_a_group = "myfirstid";
        myClassEntity.monday = "something on Monday";
        myClassEntity.tuesday = "on Tuesday";
        myClassEntity.wednesday = "another on Wed";
        myClassEntity.thursday = "this on Thurs";
        myClassEntity.friday = "TGIF";
2020-01-07 09:48:30.251 D/ITEMSINDB: 0
2020-01-07 09:48:30.254 D/ITEMSINDB: 1
2020-01-07 09:57:03.217 D/ITEMSINDB: 1
2020-01-07 09:57:03.218 D/ITEMSINDB: 1
List<String> mygroups = database.classDao().getIdOfAllGroups();
@Query("SELECT count() > 0  FROM ClassEntity WHERE id_of_a_group = :id")
boolean doesGroupExist(String id);
    String test1 = "this group doesn not exists";
    if (!database.classDao().doesGroupExist(test1)) {
        Log.d("GROUPLOOKUPRESULT","Group " + test1 + " Not located.");
    } else {
        Log.d("GROUPLOOKUPRESULT","Group " + test1 + " Located.");
    String test2 = "myfirstid";
    if (database.classDao().doesGroupExist(test2)) {
        Log.d("GROUPLOOKUPRESULT","Group " + test2 + " Located.");
    } else {
        Log.d("GROUPLOOKUPRESULT","Group " + test2 + " Not Located.");
2020-01-07 10:17:49.201 D/GROUPLOOKUPRESULT: Group this group doesn not exists Not located.
2020-01-07 10:17:49.201 D/GROUPLOOKUPRESULT: Group myfirstid Located.

value returned from SQLite using Room Persistence is not being assigned to MutableLiveData

Tag : android , By : Eugenio
Date : March 29 2020, 07:55 AM
this one helps. Inside your activity sumOfAllWeight is not observable. So it's not reflect when changes outside observer. Check with below code:
    Observer {
        tv_sum_lbl.text =   "$it - KG(s)" // Now check value here

Socket.io joining a room registers the room but only joins an empty string room

Tag : node.js , By : wiznick
Date : March 29 2020, 07:55 AM
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