old_contents: from django.db import models
  
  # Create your models here.
  class Event(models.Model):
    eventfulID = models.IntegerField()
    date = models.DateField()
    duration = models.DurationField()
    category = models.TextField()
    title = models.TextField()
    location = models.TextField()
    venue = models.TextField()
    longitude = models.FloatField()
    latitude = models.FloatField()
    poster = models.ImageField()
  
  class Picture(models.Model):
    path = models.ImageField()
    event = models.ForeignKey(Event)
    luminosity = models.IntegerField()
    # other img properties
  
  class Mosaic(models.Model):
    event = models.ForeignKey(Event)
  
  class Mosaic_cell(models.Model):
    mosaic = models.ForeignKey(Mosaic)
    picture = models.ForeignKey(Picture)
    row = models.IntegerField()
    column = models.IntegerField()
new_contents: from django.db import models
  
  # Create your models here.
  class Event(models.Model):
    id_source = models.IntegerField()
    source = Model.CharField()
    date_start = models.DateTimeField()
    date_end = models.DateTimeField()
    category = models.TextField()
    title = models.TextField()
    location = models.TextField()
    venue = models.TextField()
    longitude = models.FloatField()
    latitude = models.FloatField()
    poster = models.ImageField()
  
  class Picture(models.Model):
    path = models.ImageField()
    event = models.ForeignKey(Event)
    hue = models.IntegerField()
    # other img properties
  
  class Mosaic(models.Model):
    event = models.ForeignKey(Event)
  
  class Mosaic_cell(models.Model):
    mosaic = models.ForeignKey(Mosaic)
    picture = models.ForeignKey(Picture)
    row = models.IntegerField()
    column = models.IntegerField()
subject: update model