Question

我现在已经僵尸化了，正等着有人打我，让我入睡。我知道这很简单，因为我是django和python的新手，我做错了。

我希望将模型FK字段呈现为文本字段..很容易（不是Linux操作系统）....对吗？

我不这么认为......

好吧，我在SO reverse foreign key relationship

上找到了一个解决方案

但是唉它对我不起作用，我尝试过并尝试过......等等......

我把我的代码放在这里，如果有人为了所有神圣或邪恶的事情可以帮助我解决这个问题，另外如果可能的话提供一些文档，这样我就可以学习如何在将来自己做这些事情（也教我怎么抓鱼？）我会非常感激，领主会向你发出祝福。

models.py

out =

     1     2     3
     4     5     6
     7     8     9
    10    11    12

forms.py

class Recipe(models.Model):
    ''' Add/update recipes. User and Guests can update the recipes.
    Requires admin approval for posting recipes unless user is 
    has some privileges. '''
    user = models.ForeignKey(settings.AUTH_USER_MODEL, null=True, blank=True)
    title = models.CharField(max_length=50, verbose_name=_('Recipe|title'))
    summary = models.CharField(max_length=500, blank=True, verbose_name=_('Recipe|summary'))
    description = models.TextField(blank=True, verbose_name=_('Recipe|description'))
    slug = models.SlugField(unique=True, max_length=50, null=False, blank=False)
    prep_time = models.CharField(max_length=100, blank=True)  # This field type is a guess.
    ctime = models.DateTimeField(auto_now_add=True)
    mtime = models.DateTimeField(auto_now=True)
    sources = models.ManyToManyField(Source, blank=True)
    category = models.ForeignKey(Category)
    serving_string = models.ForeignKey(ServingString, null=True, blank=True)
    serving_value = models.IntegerField(null=True, blank=True)
    DIFFICULTY = Choices((0, 'easy', 'Easy'), (1, 'medium', 'Medium'), (3, 'hard', 'Hard'))
    difficulty = models.IntegerField(choices=DIFFICULTY)
    tag = TaggableManager(help_text="A comma separated list of tags")

class Ingredient(models.Model):
    amount = models.FloatField(null=True, blank=True, verbose_name=_('Ingredient|amount'))
    amountMax = models.FloatField(null=True, blank=True)
    unit = models.ForeignKey(Unit, null=True, blank=True)
    recipe = models.ForeignKey(Recipe)
    food = models.ForeignKey(Food)
    prep_method = models.ForeignKey(PrepMethod, null=True, blank=True)
    order_index = PositionField(blank=True, null=True, unique_for_field="direction")
    direction = models.ForeignKey(Direction, related_name='ingredients', null=True, blank=True)


class Food(models.Model):
    name = models.CharField(max_length=150, verbose_name=_('Food|name'))
    name_sorted = models.CharField(max_length=150, default='', verbose_name=_('Food|name_sorted'))
    group = models.ForeignKey(FoodGroup, null=True, blank=True)
    conversion_src_unit = models.ForeignKey(Unit, related_name='+', null=True, blank=True)
    conversion_factor = models.FloatField(null=True, blank=True)
    name_plural = models.CharField(max_length=150, null=True, blank=True)
    detail = models.TextField(blank=True)
    in_foodguide = models.BooleanField(default=True)

forms.py - 定义内联formset

class RecipeForm(forms.ModelForm):
    class Meta:
        model = Recipe
        fields = ['title', 'summary', 'description', 'prep_time', 'sources',
                 'category','serving_string', 'serving_value','difficulty', 'tag']

class DirectionForm(forms.ModelForm):
    class Meta:
        model = Direction
        fields = ['text', ]


class FoodForm(forms.ModelForm):
    class Meta:
        model = Food
        exclude = ['name', 'name_sorted', 'group', 'conversion_src_unit', 
                    'conversion_factor', 'name_plural', 'detail', 'in_foodguide']

class IngredientForm(forms.ModelForm):
    food_name = forms.CharField(required=True)
    class Meta:
        model =  Ingredient
        # fields = ['amount', 'amountMax', 'unit', 'prep_method', 'food_name']
        exclude = ('food',)

    def __init__(self, *args, **kwargs):
        super(IngredientForm, self).__init__(*args, **kwargs)
        print 'instance', self.instance
        if self.instance and not self.data:
            try:
                self.initial['food_name'] = self.instance.food.name
                # I added the try block else it RelatedObjectDOesNotExist Error occured.
                # Ingredient has no food
            except:
                pass

    def save(self, commit=True):
        food_name =  self.cleaned_data['food_name']
        name, _ = Food.objects.get_or_create(name=food_name)
                # I printed self.save and it goes into infinite loop.
        instance = self.save(commit=False)
        instance.name = name
        if commit == True:
            instance.save()
        return instance

views.py

DirInline = inlineformset_factory(Recipe, Direction, form=DirectionForm, extra=1)
IngInline = inlineformset_factory(Recipe, Ingredient, form=IngredientForm, extra=1)

如果您认为快速消化的代码很长，我会制作一个简单的版本

Answer 1

甘薯!!我知道我正在做一些愚蠢的事情。事实证明我应该在保存中称为超级，我不是......这是代码......但如果可以，请参考我的文档。

<强> forms.py

def save(self, commit=True):
    food_name =  self.cleaned_data['food_name']
    name, _ = Food.objects.get_or_create(name=food_name)
    instance = super(IngredientForm, self).save(commit=False)
    instance.food = name
    if commit:
        instance.save()
    return instance

Django覆盖保存内联formset

1 个答案: