Problem: EOL Django 1.4

• 1.4: 23/03/2012
• 1.5: 26/02/2013 (no more supported)
• 1.6: 06/11/2013 (no more supported)
• 1.7: 02/09/2014
• 1.8: 01/04/2015
• ---> We are here: 01/08/2015 <---
• 1.4 EOL: 01/10/2015
• 1.9: 01/12/2015

Massive upgrade to next secure version

Old 1.4 code still produced

Process

• For each Django version (1.5, 1.6, ...):
• Read Django release notes
• Run automatic tests
• Do manual testing
• Fix each issue

Compatibility

Example 1

                    
# compat/db.py
from django.db import transaction

if django.VERSION < (1, 6):
    atomic_compat_transaction = transaction.commit_on_success
else:
    atomic_compat_transaction = transaction.atomic
                    
                

                    
# your_app/views.py
from compat.db import atomic_compat_transaction

@atomic_compat_transaction
def your_view(request):
    # Your view code here
                    
                

Example 2

                    
# compat/fields.py

if django.VERSION < (1, 8):
    ALL_FIELDS = None
else:
    ALL_FIELDS = '__all__'
                    
                

                    
# your_app/forms.py
from compat.fields import ALL_FIELDS

class YourForm(forms.ModelForm):

    class Meta:
        model = YourModel
        fields = ALL_FIELDS
                
            

Deprecated rules

• Prevent regressions
• Management command launched during test phase
• Help people to fix it themself

Rules definition

                    
'deprecated_transaction_system': {
    'message': 'Transaction management has been completely changed. atomic is replacing old commit_on_success and other utils.',
    'regex': r'.*(((@|with\s)transaction\.(commit_on_success|commit_manually))).*',
    'number': '1603'
},
                    
                

Example 1

                
$ ./manage.py check_deprecated_rules

./my_app/views.py
1603: Transaction management has been completely changed.
      atomic is replacing old commit_on_success and other utils.
L204: @transaction.commit_on_success
                
                

Example 2

                
$ ./manage.py check_deprecated_rules

./mon_app/models.py
1601: models.BooleanField has to be initialised with default
      parameter, as implicit default has changed between
      Django 1.4 (False) and 1.6 (None).
L192:     is_active = models.BooleanField()