How to load an object created from a model outside the project ?

[Matthieu]

Hi,

I saved with pickle an object created from a Django model :

class Country(models.Model):
    code = models.IntegerField(primary_key=True)
    name = models.CharField(max_length=30)
    def __str__(self):
        return (self.name)

england = Country(code=1, name="England")
pickle.dump(england, open( "england.p", "wb" ))

And I'm trying to access it outside Django, directly with Python :

england = pickle.load(open( "england.p", "rb" ))

But if fails :

ImproperlyConfigured: You must either define the environment variable DJANGO_SETTINGS_MODULE or call settings.configure() before accessing settings

My question is : how can i read this object (and access to its attributes) with Python without Django ?

Thanks for your help,

Matthieu

[Gergely Polonkai]

Hello,

if you don't have to modify the object, I would suggest using serialization instead of pickling.

Best,
Gergely

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[Matthieu]

Hi Gergely,

Thanks for you answer. 

I don't need to modify the object. I also tried with "dill" package but it's not working either. How can I use serialization with my example ?

[Gergely Polonkai]

Hello,

depends on what exactly you want to do. You can take a look at Django’s own serialization solution[1], or, if you want to build a REST framework based on this, you may want to look at [2] or [3].

Best,

Gergely

[1] https://docs.djangoproject.com/en/1.8/topics/serialization/

[2] https://django-restless.readthedocs.org/en/latest/

[3] http://www.django-rest-framework.org/

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[Matthieu]

These solutions seem interesting :) Thanks !