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1
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""" |
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2
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Django compatibility features |
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3
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""" |
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4
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from django.db import transaction, models |
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5
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6
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__all__ = ( |
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7
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'transaction_atomic', |
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8
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'add_preserved_filters', |
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9
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'with_metaclass', |
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10
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'HideChoicesCharField', |
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11
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) |
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12
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13
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# New transaction support in Django 1.6 |
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14
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try: |
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15
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transaction_atomic = transaction.atomic |
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16
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except AttributeError: |
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17
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transaction_atomic = transaction.commit_on_success |
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18
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19
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20
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# Preserving admin form filters when adding parameters to the URL |
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21
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try: |
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22
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# Django 1.6 supports this, and django-parler also applies this fix. |
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23
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from django.contrib.admin.templatetags.admin_urls import add_preserved_filters |
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24
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except ImportError: |
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25
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# Django <1.6 does not preserve filters |
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26
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def add_preserved_filters(context, form_url): |
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27
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return form_url |
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28
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29
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30
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def with_metaclass(meta, *bases): |
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31
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# Function from python-future and jinja2. License: BSD. |
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32
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# Allow consistent behaviours across all django versions |
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33
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# Also avoids a temporary intermediate class |
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34
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class metaclass(meta): |
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35
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__call__ = type.__call__ |
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36
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__init__ = type.__init__ |
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37
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38
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def __new__(cls, name, this_bases, d): |
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39
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if this_bases is None: |
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40
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return type.__new__(cls, name, (), d) |
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41
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return meta(name, bases, d) |
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42
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return metaclass('temporary_class', None, {}) |
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43
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44
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45
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class HideChoicesCharField(models.CharField): |
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46
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# For Django 1.7, hide the 'choices' for a field. |
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47
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48
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def deconstruct(self): |
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49
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name, path, args, kwargs = models.CharField.deconstruct(self) |
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50
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51
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# Hide the fact this model was used. |
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52
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if path == __name__ + '.HideChoicesCharField': |
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53
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path = 'django.db.models.CharField' |
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54
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try: |
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55
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del kwargs['choices'] |
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56
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except KeyError: |
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57
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pass |
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58
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59
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return name, path, args, kwargs |
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60
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61
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def south_field_triple(self): |
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62
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from south.modelsinspector import introspector |
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63
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args, kwargs = introspector(self) |
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64
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return ('django.db.models.fields.CharField', args, kwargs) |
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65
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66
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try: |
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67
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from south.modelsinspector import add_introspection_rules |
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68
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except ImportError: |
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69
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pass |
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70
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else: |
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71
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add_introspection_rules([], ["^" + __name__.replace(".", "\.") + "\.HideChoicesCharField"]) |
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72
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edoburu /
django-parler
