【发布时间】：2012-05-13 14:30:03
【问题描述】：
好的，所以我想要一些关于如何设置模型的建议。我有一个正在开发的食谱模型（计划在厨房里放一个平板电脑）。我想做的是让每个食谱都有一个成分表，但也有一个与成分表匹配的相应数量列表。我的想法是我有一个成分模型，用于跟踪我手头有哪些成分和多少，配方模型将有它自己的成分列表以及需要的数量。这样我就可以让应用程序显示我有配料要做的食谱，并隐藏我没有配料的食谱（或者实际上它会更精细，但就是这样）。这是我目前的设置：
成分模型.py
class Unit_of_Measure(models.Model):
"""Unit_of_Measure model. This is used as the foriegnkey for the Quantity model unit_of_measure key."""
class Meta:
verbose_name_plural = "Units of Measure"
def __unicode__(self):
return self.unit_of_measure
unit_of_measure = models.CharField(max_length=200)
class Location(models.Model):
"""Location model. This is used a the foriegnkey for the Ingredient model location key."""
class Meta:
verbose_name_plural = "Locations"
def __unicode__(self):
return self.place
place = models.CharField(max_length=200)
class Ingredient(models.Model):
"""Ingredients model. Includes ingredient title, quantity on hand, location of ingredient (foreignkey), expiration date, and if it is a shop for ingrdient."""
class Meta:
verbose_name_plural = "Ingredients"
def __unicode__(self):
return self.title
title = models.CharField(max_length=200)
quantity = models.CharField(max_length=200)
unit_of_measure = models.ForeignKey(Unit_of_Measure)
location = models.ForeignKey(Location)
expiration_date = models.DateTimeField()
shop_for = models.BooleanField()
配方模型.py
class RecipeType(models.Model):
"""Recipe type model. This is used as the foreign key for the Recipe model recipe style."""
def __unicode__(self):
return self.style
style = models.CharField(max_length=200)
class Recipe(models.Model):
"""Recipe model. Includes recipe title, recipe style (dinner, snack, etc..), ingredient list (foreignkey), recipe instructions, storage style, and expiration date."""
class Meta:
verbose_name_plural = "Recipes"
def __unicode__(self):
return self.title
title = models.CharField(max_length=200)
style = models.ForeignKey(RecipeType)
required_ingredient_list = models.ManyToManyField(Ingredient, related_name='additional_ingredient_list')
additional_ingredient_list = models.ManyToManyField(Ingredient, related_name='required_ingredient_list', blank=True)
recipe_instruction = models.TextField()
storage_style = models.CharField(max_length=200)
expiration_date = models.DateTimeField()
那么关于如何匹配两个字段列表有什么建议吗？像“required_ingredient_list”匹配到“required_ingredient_quantity_list”之类的？还是更好的解决方案？或者一般有什么建议？现在我可以按成分对食谱进行排序，但由于成分模型的数量是我厨房里手头的数量，我真的没有一个字段来表示食谱使用的数量，它只是在 recipe_instruction 字段中说出来。哈尔普兹！
【问题讨论】：
标签： django