我正在嘗試迭代模型以獲取列表中的第一個圖像,並且它給了我模型不可迭代的錯誤。以下是我的代碼模型和模板。我只需要獲取與單一產品相關的列表中的第一張圖片。Django模型在模板中不可迭代
models.py:
class Product(models.Model):
title = models.CharField(max_length=500)
description = models.TextField(blank=True, null=True)
price = models.DecimalField(max_digits=20, decimal_places=2)
sku = models.CharField(null=True, max_length=100)
url = models.URLField(blank=True)
slug = models.SlugField(unique=True)
categories = models.ManyToManyField('Category', blank=True)
default = models.ForeignKey('Category', related_name='default_category', null=True, blank=True)
provider = models.ForeignKey('Product', on_delete=models.CASCADE)
def __unicode__(self):
return self.title
def get_absolute_url(self):
return reverse('product_detail', kwargs={"slug": self.slug})
def get_image_url(self):
img = self.productimage_set.first()
if img:
return img.image.url
return img
def get_image_list(self):
return self.productimage_set.all()
def image_upload_to(instance, filename):
title = instance.product.title
slug = slugify(title)
basename, file_extension = filename.rsplit('.', 1)
new_filename = '%s-%s.%s' % (basename, instance.id, file_extension)
return 'products/%s/%s' % (slug, new_filename)
class ProductImage(models.Model):
product = models.ForeignKey(Product)
image = models.ImageField(upload_to=image_upload_to)
def __unicode__(self):
return self.product.title
prduct_detail.html:
<div class="pics clearfix">
<div class="thumbs">
{% for img in product.get_image_list %}
<div class="preview">
<a href="{{ img.get_absolute_url }}" class="selected" data-full="{{ img.image.url }}" data-title="title"> <img src="{{ img.image.url }}"> </a>
</div>
{% endfor %}
</div>
<div class="imglarge">
{% for img in object.productimage_set.all %}
<a href="{{ object.get_absolute_url }}" class="full" title="title"> <img src="{{ img.image.url }}"> </a>
{% endfor %}
</div>
</div>
圖像列表來了罰款,但第一圖像不來了因爲它要麼顯示了{% for img in object.productimage_set.first %}
所有的圖像就顯示錯誤如下:
'ProductImage' object is not iterable
Request Method: GET
Request URL: http://localhost:8000/items-for-kids
Django Version: 1.8.13
Exception Type: TypeError
Exception Value:
'ProductImage' object is not iterable
Exception Location: C:\Users\AliKhan\eCom\lib\site-packages\django\template\defaulttags.py in render, line 161
Python Executable: C:\Users\AliKhan\eCom\Scripts\python.EXE
Python Version: 2.7.9
它爲我工作。謝謝 –