def __init__(self):
		'''创建表'''
		self.conn = sqlite3.connect("./items.db")
		if VERBOSE:
			print 'Database connection OPEN.'
		# Domain 表
		self.conn.execute(CTABLE_DOMAIN)
		# Website 表
		self.conn.execute(CTABLE_WEBSITE)
		# Rule 表 
		self.conn.execute(CTABLE_RULESETS)

		self.conn.commit()
		if VERBOSE:
			cur = self.conn.cursor()
			print 'Tables:',cur.execute("SELECT name FROM sqlite_master WHERE type = 'table'").fetchall()
def save(self, *args, **kwargs):
        # Get all other primary domains with the same tenant
        domain_list = self.__class__.objects.filter(tenant=self.tenant, is_primary=True).exclude(pk=self.pk)
        # If we have no primary domain yet, set as primary domain by default
        self.is_primary = self.is_primary or (not domain_list.exists())
        if self.is_primary:
            # Remove primary status of existing domains for tenant
            domain_list.update(is_primary=False)
        super().save(*args, **kwargs)