Hello, In Django, you can instanciate objects from your model without persist it to the database. The way you do it is Country(name=..., ...).
In order to create multiple objects at once, you can call the bulk_create method on the manager with a list of object to persist. The using(db_alias) is instanciating the manager. I won't explain further cause my knowledge of this area is reduced. Have a good one On 03/05/2015 01:20 AM, Murthy Sandeep wrote:
I am working on a data migration for my Django app to populate the main table in the db with data that will form the mainstay of the app - this is persistent/permanent data that may added to but never deleted. My reference is the Django 1.7 documentation and in particular an example on page https://docs.djangoproject.com/en/1.7/ref/migration-operations/#django.db.migrations.operations.RunPython with a custom method called forward_funcs: def forwards_func(apps, schema_editor): # We get the model from the versioned app registry; # if we directly import it, it'll be the wrong version Country = apps.get_model("myapp", "Country") db_alias = schema_editor.connection.alias Country.objects.using(db_alias).bulk_create([ Country(name="USA", code="us"), Country(name="France", code="fr"),]) I was wondering if someone could please explain what is happening here and how this method works - is the argument to bulk_create a list of namedtuple objects called Country or are these Country model objects? Also could someone please explain what db_alias is? Sandeep
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