Django TypeError 'ProductFeaturesValue' 对象不可迭代
Django TypeError 'ProductFeaturesValue' object is not iterable
我想渲染多个内联表单集，正在渲染第一个表单集，但第二个和第三个表单集的对象不可迭代。我不明白我在这里做错了什么。请帮助我。
这是我的模型：
class Product(models.Model):
product_code = models.CharField(max_length=50, unique=True)
product = models.CharField(max_length=100, unique=True)
keywords = models.CharField(max_length=50, blank=True, null=True)
description = models.CharField(max_length=255, blank=True, null=True)
detail = models.TextField(blank=True, null=True)
cost_price = models.DecimalField(max_digits=10, decimal_places=2)
sale_price = models.DecimalField(max_digits=10, decimal_places=2)
quantity_per_unit = models.CharField(max_length=100, blank=True, null=True)
discontinue = models.BooleanField(default=False)
photo = models.ImageField(upload_to = 'images/product/', default = 'images/product/None/no-img.jpg')
categories = models.ManyToManyField('Category', blank=True)
brand = models.ForeignKey('Brand', blank=True, null=True, on_delete=models.SET_NULL)
slug = AutoSlugField(_('slug'), max_length=50, unique=True, populate_from=('product',))
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
created_by = models.ForeignKey(User,
related_name="+", blank=True, null=True,
on_delete=models.SET_NULL)
updated_by = models.ForeignKey(User,
related_name="+", blank=True, null=True,
on_delete=models.SET_NULL)
is_deleted = models.BooleanField(default=False)
class Meta:
default_related_name = 'product'
def __str__(self):
return self.product
def __str__(self):
return "%s (%s)" % (
self.product,
", ".join(categories.category for categories in self.categories.all()),
)
def image_tag(self):
return mark_safe('<img src="{}" height="50"/>').format(self.photo.url)
class Image(models.Model):
def images_directory_path(instance, filename):
return '/'.join(['images/product/', str(instance.product_id.id), str(uuid.uuid4().hex + ".png")])
product = models.ForeignKey('Product', on_delete=models.CASCADE, related_name='images')
title = models.CharField(max_length=50, blank=True, null=True)
image = models.FileField(blank=True, null=True, upload_to=images_directory_path, default = None)
def __str__(self):
return self.title
class ProductFeaturesValue(models.Model):
product = models.ForeignKey('Product', on_delete=models.CASCADE, related_name='featuresvalues')
feature = models.ForeignKey('ProductFeatures', blank=True, null=True, on_delete=models.CASCADE)
defined_value = models.CharField(max_length=50, blank=True, null=True)
custom_value = models.CharField(max_length=50, blank=True, null=True)
class ProductSpecificValue(models.Model):
product = models.ForeignKey('Product', on_delete=models.CASCADE, related_name='specificvalues')
start = models.DateTimeField(blank=True, null=True)
end = models.DateTimeField(blank=True, null=True)
unit = models.PositiveIntegerField(blank=True, null=True)
type = models.CharField(max_length=1, blank=True, null=True)
percent = models.DecimalField(max_digits=5, decimal_places=2, default=0)
amount = models.DecimalField(max_digits=5, decimal_places=2, default=0)
表格：
class ProductForm(forms.ModelForm):
class Meta:
model = Product
exclude = ()
ImageFormSet = inlineformset_factory(Product, Image, extra=1, fields='__all__')
FeatureFormSet = inlineformset_factory(Product, ProductFeaturesValue, extra=1, fields='__all__')
SpecificFormSet = inlineformset_factory(Product, ProductSpecificValue, extra=1, fields='__all__')
查看：
class ProductCreateView(CreateView):
template_name = 'products/index.html'
model = Product
form_class = ProductForm
success_url = reverse_lazy('accpack:products')
def get(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
image_form = ImageFormSet()
feature_form = ProductFeaturesValue()
specific_form = ProductSpecificValue()
return self.render_to_response(
self.get_context_data(form=form,
image_form=image_form,
feature_form=feature_form,
specific_form=specific_form,))
模板：
当我删除第二个和第三个表单集时，表单呈现正常。
{% load crispy_forms_tags %}
{% load static %}
<form action="." method="post">
{% csrf_token %}
<div>
{{form.as_p}}
</div>
<fieldset>
{{ image_form.management_form }}
{{ image_form.non_form_errors }}
{% for form in image_form %}
{{ form.id }}
<div class="inline {{ image_form.prefix }}">
{{ form.title.errors }}
{{ form.title.label_tag }}
{{ form.title }}
{{ form.image.errors }}
{{ form.image.label_tag }}
{{ form.image }}
</div>
{% endfor %}
</fieldset>
<fieldset>
{{ feature_form.management_form }}
{{ feature_form.non_form_errors }}
{% for form in feature_form %}
{{ form.id }}
<div class="inline {{ feature_form.prefix }}">
{{ form.feature.errors }}
{{ form.feature.label_tag }}
{{ form.feature }}
</div>
{% endfor %}
</fieldset>
<fieldset>
{{ specific_form.management_form }}
{{ specific_form.non_form_errors }}
{% for form in specific_form %}
{{ form.id }}
<div class="inline {{ specific_form.prefix }}">
{{ form.amount.errors }}
{{ form.amount.label_tag }}
{{ form.amount }}
</div>
{% endfor %}
</fieldset>
<input type="submit" value="Add recipe" class="submit" />
</form>
<script src="{% static 'js/jquery/jquery.formset.js' %}"></script>
<script type="text/javascript">
$(function() {
$(".inline.{{ image_form.prefix }}").formset({
addText: "<i class='far fa-plus-square fa-2x'></i>",
deleteText: "<i class='pl-3 far fa-minus-square fa-2x'></i>",
prefix: "{{ image_form.prefix }}",
})
})
</script>
追溯（最近调用最后）：
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
response = get_response(request)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\core\handlers\base.py", line 202, in _get_response
response = response.render()
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\response.py", line 105, in render
self.content = self.rendered_content
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\response.py", line 83, in rendered_content
return template.render(context, self._request)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\backends\django.py", line 61, in render
return self.template.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 170, in render
return self._render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\loader_tags.py", line 150, in render
return compiled_parent._render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\loader_tags.py", line 62, in render
result = block.nodelist.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\defaulttags.py", line 312, in render
return nodelist.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\defaulttags.py", line 312, in render
return nodelist.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\loader_tags.py", line 192, in render
return template.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 172, in render
return self._render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\defaulttags.py", line 167, in render
values = list(values)
Exception Type: TypeError at /products/
Exception Value: 'ProductFeaturesValue' object is not iterable
def get(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
image_form = ImageFormSet()
feature_form = ProductFeaturesValue()
specific_form = ProductSpecificValue()
feature_form 和 specific_form 不是表单集。我认为你打算改为这样做：
image_form = ImageFormSet()
feature_form = FeatureFormSet()
specific_form = SpecificFormSet()
我想渲染多个内联表单集，正在渲染第一个表单集，但第二个和第三个表单集的对象不可迭代。我不明白我在这里做错了什么。请帮助我。
这是我的模型：
class Product(models.Model):
product_code = models.CharField(max_length=50, unique=True)
product = models.CharField(max_length=100, unique=True)
keywords = models.CharField(max_length=50, blank=True, null=True)
description = models.CharField(max_length=255, blank=True, null=True)
detail = models.TextField(blank=True, null=True)
cost_price = models.DecimalField(max_digits=10, decimal_places=2)
sale_price = models.DecimalField(max_digits=10, decimal_places=2)
quantity_per_unit = models.CharField(max_length=100, blank=True, null=True)
discontinue = models.BooleanField(default=False)
photo = models.ImageField(upload_to = 'images/product/', default = 'images/product/None/no-img.jpg')
categories = models.ManyToManyField('Category', blank=True)
brand = models.ForeignKey('Brand', blank=True, null=True, on_delete=models.SET_NULL)
slug = AutoSlugField(_('slug'), max_length=50, unique=True, populate_from=('product',))
created_at = models.DateTimeField(auto_now_add=True)
updated_at = models.DateTimeField(auto_now=True)
created_by = models.ForeignKey(User,
related_name="+", blank=True, null=True,
on_delete=models.SET_NULL)
updated_by = models.ForeignKey(User,
related_name="+", blank=True, null=True,
on_delete=models.SET_NULL)
is_deleted = models.BooleanField(default=False)
class Meta:
default_related_name = 'product'
def __str__(self):
return self.product
def __str__(self):
return "%s (%s)" % (
self.product,
", ".join(categories.category for categories in self.categories.all()),
)
def image_tag(self):
return mark_safe('<img src="{}" height="50"/>').format(self.photo.url)
class Image(models.Model):
def images_directory_path(instance, filename):
return '/'.join(['images/product/', str(instance.product_id.id), str(uuid.uuid4().hex + ".png")])
product = models.ForeignKey('Product', on_delete=models.CASCADE, related_name='images')
title = models.CharField(max_length=50, blank=True, null=True)
image = models.FileField(blank=True, null=True, upload_to=images_directory_path, default = None)
def __str__(self):
return self.title
class ProductFeaturesValue(models.Model):
product = models.ForeignKey('Product', on_delete=models.CASCADE, related_name='featuresvalues')
feature = models.ForeignKey('ProductFeatures', blank=True, null=True, on_delete=models.CASCADE)
defined_value = models.CharField(max_length=50, blank=True, null=True)
custom_value = models.CharField(max_length=50, blank=True, null=True)
class ProductSpecificValue(models.Model):
product = models.ForeignKey('Product', on_delete=models.CASCADE, related_name='specificvalues')
start = models.DateTimeField(blank=True, null=True)
end = models.DateTimeField(blank=True, null=True)
unit = models.PositiveIntegerField(blank=True, null=True)
type = models.CharField(max_length=1, blank=True, null=True)
percent = models.DecimalField(max_digits=5, decimal_places=2, default=0)
amount = models.DecimalField(max_digits=5, decimal_places=2, default=0)
表格：
class ProductForm(forms.ModelForm):
class Meta:
model = Product
exclude = ()
ImageFormSet = inlineformset_factory(Product, Image, extra=1, fields='__all__')
FeatureFormSet = inlineformset_factory(Product, ProductFeaturesValue, extra=1, fields='__all__')
SpecificFormSet = inlineformset_factory(Product, ProductSpecificValue, extra=1, fields='__all__')
查看：
class ProductCreateView(CreateView):
template_name = 'products/index.html'
model = Product
form_class = ProductForm
success_url = reverse_lazy('accpack:products')
def get(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
image_form = ImageFormSet()
feature_form = ProductFeaturesValue()
specific_form = ProductSpecificValue()
return self.render_to_response(
self.get_context_data(form=form,
image_form=image_form,
feature_form=feature_form,
specific_form=specific_form,))
模板： 当我删除第二个和第三个表单集时，表单呈现正常。
{% load crispy_forms_tags %}
{% load static %}
<form action="." method="post">
{% csrf_token %}
<div>
{{form.as_p}}
</div>
<fieldset>
{{ image_form.management_form }}
{{ image_form.non_form_errors }}
{% for form in image_form %}
{{ form.id }}
<div class="inline {{ image_form.prefix }}">
{{ form.title.errors }}
{{ form.title.label_tag }}
{{ form.title }}
{{ form.image.errors }}
{{ form.image.label_tag }}
{{ form.image }}
</div>
{% endfor %}
</fieldset>
<fieldset>
{{ feature_form.management_form }}
{{ feature_form.non_form_errors }}
{% for form in feature_form %}
{{ form.id }}
<div class="inline {{ feature_form.prefix }}">
{{ form.feature.errors }}
{{ form.feature.label_tag }}
{{ form.feature }}
</div>
{% endfor %}
</fieldset>
<fieldset>
{{ specific_form.management_form }}
{{ specific_form.non_form_errors }}
{% for form in specific_form %}
{{ form.id }}
<div class="inline {{ specific_form.prefix }}">
{{ form.amount.errors }}
{{ form.amount.label_tag }}
{{ form.amount }}
</div>
{% endfor %}
</fieldset>
<input type="submit" value="Add recipe" class="submit" />
</form>
<script src="{% static 'js/jquery/jquery.formset.js' %}"></script>
<script type="text/javascript">
$(function() {
$(".inline.{{ image_form.prefix }}").formset({
addText: "<i class='far fa-plus-square fa-2x'></i>",
deleteText: "<i class='pl-3 far fa-minus-square fa-2x'></i>",
prefix: "{{ image_form.prefix }}",
})
})
</script>
追溯（最近调用最后）：
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\core\handlers\exception.py", line 47, in inner
response = get_response(request)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\core\handlers\base.py", line 202, in _get_response
response = response.render()
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\response.py", line 105, in render
self.content = self.rendered_content
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\response.py", line 83, in rendered_content
return template.render(context, self._request)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\backends\django.py", line 61, in render
return self.template.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 170, in render
return self._render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\loader_tags.py", line 150, in render
return compiled_parent._render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\loader_tags.py", line 62, in render
result = block.nodelist.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\defaulttags.py", line 312, in render
return nodelist.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\defaulttags.py", line 312, in render
return nodelist.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\loader_tags.py", line 192, in render
return template.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 172, in render
return self._render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 162, in _render
return self.nodelist.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 938, in render
bit = node.render_annotated(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\base.py", line 905, in render_annotated
return self.render(context)
File "C:\Users\Dell\anaconda3\envs\webapp\lib\site-packages\django\template\defaulttags.py", line 167, in render
values = list(values)
Exception Type: TypeError at /products/
Exception Value: 'ProductFeaturesValue' object is not iterable
def get(self, request, *args, **kwargs):
self.object = None
form_class = self.get_form_class()
form = self.get_form(form_class)
image_form = ImageFormSet()
feature_form = ProductFeaturesValue()
specific_form = ProductSpecificValue()
feature_form 和 specific_form 不是表单集。我认为你打算改为这样做：
image_form = ImageFormSet()
feature_form = FeatureFormSet()
specific_form = SpecificFormSet()