110 lines
3.2 KiB
Python
110 lines
3.2 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (c) The python-semanticversion project
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# This code is distributed under the two-clause BSD License.
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from __future__ import unicode_literals
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import django
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from django.db import models
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from django.utils.translation import ugettext_lazy as _
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from . import base
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class SemVerField(models.CharField):
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def __init__(self, *args, **kwargs):
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kwargs.setdefault('max_length', 200)
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super(SemVerField, self).__init__(*args, **kwargs)
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if django.VERSION[:2] < (1, 8):
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def contribute_to_class(self, cls, name, **kwargs):
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"""Emulate SubFieldBase for Django < 1.8"""
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super(SemVerField, self).contribute_to_class(cls, name, **kwargs)
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from django.db.models.fields import subclassing
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setattr(cls, self.name, subclassing.Creator(self))
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def from_db_value(self, value, expression, connection, context):
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"""Convert from the database format.
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This should be the inverse of self.get_prep_value()
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"""
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return self.to_python(value)
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def get_prep_value(self, obj):
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return None if obj is None else str(obj)
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def get_db_prep_value(self, value, connection, prepared=False):
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if not prepared:
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value = self.get_prep_value(value)
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return value
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def value_to_string(self, obj):
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value = self.to_python(self._get_val_from_obj(obj))
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return str(value)
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def run_validators(self, value):
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return super(SemVerField, self).run_validators(str(value))
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class VersionField(SemVerField):
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default_error_messages = {
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'invalid': _("Enter a valid version number in X.Y.Z format."),
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}
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description = _("Version")
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def __init__(self, *args, **kwargs):
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self.partial = kwargs.pop('partial', False)
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self.coerce = kwargs.pop('coerce', False)
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super(VersionField, self).__init__(*args, **kwargs)
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def to_python(self, value):
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"""Converts any value to a base.Version field."""
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if value is None or value == '':
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return value
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if isinstance(value, base.Version):
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return value
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if self.coerce:
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return base.Version.coerce(value, partial=self.partial)
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else:
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return base.Version(value, partial=self.partial)
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class SpecField(SemVerField):
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default_error_messages = {
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'invalid': _("Enter a valid version number spec list in ==X.Y.Z,>=A.B.C format."),
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}
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description = _("Version specification list")
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def to_python(self, value):
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"""Converts any value to a base.Spec field."""
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if value is None or value == '':
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return value
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if isinstance(value, base.Spec):
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return value
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return base.Spec(value)
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def add_south_rules():
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from south.modelsinspector import add_introspection_rules
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add_introspection_rules([
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(
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(VersionField,),
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[],
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{
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'partial': ('partial', {'default': False}),
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'coerce': ('coerce', {'default': False}),
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},
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),
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], ["semantic_version\.django_fields"])
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try: # pragma: no cover
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import south
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except ImportError: # pragma: no cover
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south = None
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if south: # pragma: no cover
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add_south_rules()
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