85 lines
2.6 KiB
Python
85 lines
2.6 KiB
Python
import json
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import uuid
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from datetime import datetime
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from django.db import models
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from django.utils.translation import gettext_lazy as _
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import logging
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logger = logging.getLogger(__name__)
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class BaseModel(models.Model):
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id = None
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uuid = models.UUIDField(primary_key=True, editable=False, default=uuid.uuid4, unique=True, db_index=True)
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created_at = models.DateTimeField(auto_now_add=True, db_index=True)
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updated_at = models.DateTimeField(auto_now=True, db_index=True)
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class Meta:
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abstract = True
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class ConfigValueChoices(models.TextChoices):
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INT = 'INT', _('Integer')
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FLOAT = 'FLOAT', _('Float')
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BOOLEAN = 'BOOLEAN', _('Boolean')
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STRING = 'STRING', _('String')
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DATE = 'DATE', _('Date')
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DATETIME = 'DATETIME', _('DateTime')
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JSON = 'JSON', _('JSON')
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class Config(BaseModel):
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value_dict = {}
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key = models.CharField(_('key'), max_length=255, unique=True, db_index=True)
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value = models.TextField(_('value'), null=True, blank=True)
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value_type = models.CharField(choices=ConfigValueChoices.choices, max_length=64)
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description = models.TextField(_('description'), null=True, blank=True)
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comment = models.TextField(_('comment'), null=True, blank=True)
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def get_value(self):
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return Config.get_value_of(self.key)
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@staticmethod
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def type_cast(value, value_type):
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try:
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if value_type == ConfigValueChoices.STRING.value:
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value = str(value)
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elif value_type == ConfigValueChoices.BOOLEAN.value:
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value = value.lower() == 'true'
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elif value_type == ConfigValueChoices.DATE.value:
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value = datetime.fromisoformat(value)
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elif value_type == ConfigValueChoices.DATETIME.value:
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value = datetime.fromisoformat(value)
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elif value_type == ConfigValueChoices.JSON.value:
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value = json.loads(value)
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elif value_type == ConfigValueChoices.INT.value:
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value = int(value)
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elif value_type == ConfigValueChoices.FLOAT.value:
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value = float(value)
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except Exception as e:
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value = None
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return value
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# TODO: revoke cache mechanism
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@staticmethod
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def get_value_of(key, default=None, casting_type=None):
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if not key in Config.value_dict:
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config, created = Config.objects.get_or_create(key=key, defaults={'value': default})
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Config.value_dict[key] = Config.type_cast(config.value, casting_type or config.value_type)
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logger.info(f'getting value of {key} from db: {Config.value_dict[key]}')
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value = Config.value_dict[key]
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return value
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