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96 lines
2.7 KiB
96 lines
2.7 KiB
import json
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from django.db import models
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from django.db.utils import ProgrammingError, OperationalError
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from django.utils.translation import ugettext_lazy as _
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from django.core.cache import cache
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from common.utils import signer
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class SettingQuerySet(models.QuerySet):
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def __getattr__(self, item):
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instances = self.filter(name=item)
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if len(instances) == 1:
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return instances[0]
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else:
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return Setting()
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class SettingManager(models.Manager):
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def get_queryset(self):
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return SettingQuerySet(self.model, using=self._db)
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class Setting(models.Model):
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name = models.CharField(max_length=128, unique=True, verbose_name=_("Name"))
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value = models.TextField(verbose_name=_("Value"))
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category = models.CharField(max_length=128, default="default")
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encrypted = models.BooleanField(default=False)
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enabled = models.BooleanField(verbose_name=_("Enabled"), default=True)
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comment = models.TextField(verbose_name=_("Comment"))
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objects = SettingManager()
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cache_key_prefix = '_SETTING_'
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def __str__(self):
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return self.name
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@classmethod
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def get(cls, item):
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cached = cls.get_from_cache(item)
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if cached is not None:
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return cached
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instances = cls.objects.filter(name=item)
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if len(instances) == 1:
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s = instances[0]
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s.refresh_setting()
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return s.cleaned_value
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return None
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@classmethod
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def get_from_cache(cls, item):
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key = cls.cache_key_prefix + item
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cached = cache.get(key)
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return cached
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@property
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def cleaned_value(self):
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try:
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value = self.value
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if self.encrypted:
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value = signer.unsign(value)
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if not value:
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return None
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value = json.loads(value)
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return value
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except json.JSONDecodeError:
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return None
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@cleaned_value.setter
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def cleaned_value(self, item):
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try:
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v = json.dumps(item)
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if self.encrypted:
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v = signer.sign(v)
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self.value = v
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except json.JSONDecodeError as e:
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raise ValueError("Json dump error: {}".format(str(e)))
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@classmethod
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def refresh_all_settings(cls):
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try:
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settings_list = cls.objects.all()
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for setting in settings_list:
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setting.refresh_setting()
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except (ProgrammingError, OperationalError):
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pass
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def refresh_setting(self):
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key = self.cache_key_prefix + self.name
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cache.set(key, self.cleaned_value, None)
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class Meta:
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db_table = "settings_setting"
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verbose_name = _("Setting")
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