luigi

Luigi is a simple Django app to be able to link Django to the workflow manager luigi.

Quick start

1. Add 'django_luigi' to you INSTALLED_APPS settings like this:

   INSTALLED_APP = [...
   'django_luigi',
   ]

2. Create your app and models in Django as usual
3. Run python manage.py migrate to create the models.

You can know create objects in your luigi pipeline.

Assuming a django model Test in the test app with two CharField, item1, and item2, properly migrated

class Test(models.Model):
    item1 = models.CharField(max_length=120)
    item2 = models.CharField(max_length=120)

Here is a minimal example of a job to copy data to database using Django :

import luigi
from django_luigi.django import ToORM

class TestTask(ToORM):

    django_root = 'path_to_your_django_root' # Where manage.py is
    settings_path = 'my_site.settings'

    model = 'Test'
    app = 'test'

    def rows(self):
        for row in [("item1", "property1"), ("item2", "property2")]:
            yield row

if __name__ == '__main__':
    task = TestTask()
    luigi.build([task], local_scheduler=True)

In the above examples, the data that needs to be copied was directly provided by overriding the rows method. Alternately, if the data comes from another task, the modified example would look as shown below:

import luigi
from django_luigi.django import ToORM
from luigi.mock import MockTarget

class BaseTask(luigi.Task):
    def output(self):
        return MockTarget("BaseTask")

    def run(self):
        out = self.output().open("w")
        TASK_LIST = ["item%d\\tproperty%d\\n" % (i, i) for i in range(1,3)]
        for task in TASK_LIST:
            out.write(task)
        out.close()

class TestTask(ToORM):

    django_root = 'path_to_your_django_root' # Where manage.py is
    settings_path = 'my_site.settings'

    model = 'Test'
    app = 'test'

    def requires(self):
        return BaseTask()

if __name__ == '__main__':
    task1, task2 = TestTask(), BaseTask()
    luigi.build([task1, task2], local_scheduler=True)