好吧,我在描述的狗屎。这是一个关系诊断。 relationship diag http://img248.imageshack.us/img248/3568/surveyrel.jpgDjango为子类设计的模型/数据库设计
在Django中我做了我的车型,如:
from django.db import models
from datetime import datetime
class Survey(models.Model):
name = models.CharField(max_length=100)
pub_date = models.DateTimeField('date published',default=datetime.now)
def __unicode__(self):
return self.name
# This model should be abstracted by a more specific model
class Section(models.Model):
survey = models.ForeignKey(Survey)
name = models.CharField(max_length=100)
def __unicode__(self):
return self.name
# Models for supporting the 'ratings' mode
class RatingSection(Section):
pass
class RatingQuestion(models.Model):
section = models.ForeignKey(RatingSection)
name = models.CharField(max_length=255)
def __unicode__(self):
return self.name
class RatingAnswer(models.Model):
section = models.ForeignKey(RatingSection)
name = models.CharField(max_length=60)
def __unicode__(self):
return self.name
class RatingVotes(models.Model):
question = models.ForeignKey(RatingQuestion)
answer = models.ForeignKey(RatingAnswer)
votes = models.PositiveIntegerField(default=0)
def __unicode__(self):
return self.votes + self.answer.name + ' votes for ' + self.question.name
# Models for supporting the 'multichoice' mode
class MultiChoiceSection(Section):
can_select_multiple = models.BooleanField()
class MultiChoiceQuestion(models.Model):
section = models.ForeignKey(MultiChoiceSection)
name = models.CharField(max_length=255)
def __unicode__(self):
return self.name
class MultiChoiceAnswer(models.Model):
section = models.ForeignKey(MultiChoiceSection)
name = models.CharField(max_length=60)
votes = models.PositiveIntegerField(default=0)
def __unicode__(self):
return self.name
的问题是,我几乎可以肯定,这不是做正确的方式,即使是这样,我可以” t解决了如何让Django中的管理区域向用户显示一个选择,询问他们想要的部分子类型。
什么是构建这种模型的最佳方法?
也许你可以描述更详细一点你需要什么你的“节”呢? – 2010-06-24 01:23:34
Idealy我希望每个调查都有不同类型的多个部分(例如多项选择或评级),并且我希望每个不同类型都是泛型类的子类。但是,我不确定这是否是最好的数据库模型 - 我确定它不是。 – 2010-06-24 04:22:08