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thanks for your time. i'm trying to get the first images of a foreignKey image model and display with the other fields
i've read some questions and docs about related models and the best i got was to create a function on my models to call it after just to get the first image.
models.py:
class Veiculos (models.Model):
YEAR_CHOICES = []
for r in range(1960, (datetime.now().year+1)):
YEAR_CHOICES.append((r, r))
modelo = models.CharField(max_length=100)
potencia = models.CharField(max_length=40)
cor = models.CharField(max_length=30)
preco = models.DecimalField(max_digits=8, decimal_places=2)
ano = models.IntegerField(('ano'), choices=YEAR_CHOICES, default=datetime.now().year)
category = models.ManyToManyField('Categorias')
created_time = models.DateTimeField(auto_now=True)
updated_time = models.DateTimeField(auto_now_add=True)
def __str__(self):
return '%s %s' % (self.modelo, self.preco)
def get_absolute_url(self):
return reverse('category2')
def first_image(self):
return self.images.first()
def get_image_filename(instance, filename):
modelo = instance.veicle.modelo
slug = slugify(modelo)
return "veiculos_imagens/%s-%s" % (slug, filename)
class Imagens (models.Model):
veicle = models.ForeignKey(Veiculos, default=None, on_delete=models.CASCADE, related_name='images')
imagem = models.ImageField(upload_to=get_image_filename)
views.py:
def amp_category(request):
queryset = Veiculos.objects.all()
return render(request, 'amp/category.amp.html', {'veiculos': queryset})
category.amp.html:
{% extends "amp/base.amp.html" %} {% block tittle %}
<title>ok</title>{% endblock tittle %} {% block content %}
<body>
<h1>ok2</h1>
{% for veiculo in veiculos %}
<h2>{{veiculo.modelo}}</h2>
<amp-img src="{{ veiculo.first_image.url }}" alt="ok" width="300" height="340"></amp-img>
{% endfor %}
</body>
{% endblock %}
</html>
i'm getting the queryset objects although none imaged displayed https://github.com/lucasrf27/dealership
289
It should be:
def first_image(self):
return self.images.first()or you can subscript with:
def first_image(self):
return self.images.all()[0]You can not subscript the self.images relation itself, you need to use a .all() or .first().
Note that there is a small difference between the two. If there are no related images, then self.images.first() will return None, whereas self.images.all()[0] will raise an error.
79
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