Django doesn't detect the model I try to create

I'm beginning (again) with django (1.7.5).

I've created :

• a project named "hypnose".
• an app named "main".
• a model named "Article".
• a superuser.

I've done enough code to make my application work, I can open the admin pannel, navigate through pages... But when I try to create my database, Article model isn't detected by django (I've tried with syncdb, migrate and makemigrations) : Django just acts like the models simply doesn't exists! I don't really know where the problem comes from, and I don't know if it comes from something I forgot, or if it is related to the new features of django 1.7 (with all the migration stuff I don't really understand).

Here are my source files :

main/models.py :

from django.db import models

# Create your models here.

class Article(models.Model):
    title = models.CharField(max_length = 100)
    content = models.TextField(null = True)
    date = models.DateTimeField(auto_now_add = True, auto_now = False,
    verbose_name = "Date de parution")
    slug = models.SlugField(max_length = 50)

    def __unicode__(self):
        return (u"%s" % (self.title,))

    def __str__(self):
        return ("%s" % (self.title,))

main/admin.py :

from django.contrib import admin
from main.models import Article

# Register your models here.

admin.site.register(Article)

admin.autodiscover() is enabled in hypnose.urls.py.

It could be something really stupid but I'm stuck here since this morning. Did I forget something? Thank you for your help!

Make sure that you added the main app to INSTALLED_APPS.