How to exclude search queries when selecting values in Django? - django

Question

There is a product filter in which you need to exclude other attributes when choosing a brand.
For example, we have color, size, weight, brand.
When choosing a brand, we only have certain colors, sizes and weights. How to disable their checkboxes when they are not assigned to the selected brand.
My code:
models.py
class CategoryFeature(models.Model):
category = models.ForeignKey("product.Category", on_delete=models.CASCADE)
feature_name = models.CharField(max_length=50)
feature_filter_name = models.CharField( max_length=50)
unit = models.CharField(max_length=50, null=True, blank=True)
class Meta:
unique_together = ('category', 'feature_name', 'feature_filter_name')
class FeatureValidator(models.Model):
category = models.ForeignKey("product.Category", on_delete=models.CASCADE)
feature_key = models.ForeignKey(CategoryFeature, on_delete=models.CASCADE)
valid_feature_value = models.CharField(max_length=100)
class ProductFeatures(models.Model):
product = models.ForeignKey("product.Product", on_delete=models.CASCADE)
feature = models.ForeignKey(CategoryFeature, on_delete=models.CASCADE)
value = models.CharField(max_length=255)
appstags.py
#register.filter
def product_spec(category):
product_features = ProductFeatures.objects.filter(product__category=category)
feature_and_values = defaultdict(list)
for product_feature in product_features:
if product_feature.value not in feature_and_values[(product_feature.feature.feature_name, product_feature.feature.feature_filter_name)]:
feature_and_values[
(product_feature.feature.feature_name, product_feature.feature.feature_filter_name)
].append(product_feature.value)
print(feature_and_values)
search_filter_body = """<div class="col-md-12"><center><strong>ФИЛЬТР</strong></center> <hr>{}</div>"""
mid_res = ""
for (feature_name, feature_filter_name), feature_values in feature_and_values.items():
feature_name_html = f"""<p><b>{feature_name}</b></p>"""
feature_values_res = ""
for f_v in feature_values:
mid_feature_values_res = \
"<input type='checkbox' class='check' id='check-option-{feature_name}' name='{f_f_name}' value='{feature_name}' onchange='this.form.submit();'> {feature_name}</br>".format(
feature_name=f_v, f_f_name=feature_filter_name
)
feature_values_res += mid_feature_values_res
feature_name_html += feature_values_res
mid_res += feature_name_html + '<hr>'
res = search_filter_body.format(mid_res)
return mark_safe(res)
views.py
class CategoryDetailView(ListView):
model = Product
context_object_name = 'category_products'
template_name = 'category_products.html'
def querystring_url(self):
data = self.request.GET.copy()
data.pop(self.page_kwarg, None)
return data.urlencode()
def get_queryset(self):
qs = super().get_queryset().filter(
category__slug=self.kwargs['slug']
)
qd = self.request.GET.copy()
qd.pop(self.page_kwarg, None)
if 'search' in self.request.GET:
qs = qs.filter(title__icontains=self.request.GET['search'])
elif qd:
url_kwargs = {}
for item in self.request.GET:
if len(self.request.GET.getlist(item)) > 1:
url_kwargs[item] = self.request.GET.getlist(item)
else:
url_kwargs[item] = self.request.GET.get(item)
q_condition_queries = Q()
for key, value in url_kwargs.items():
if isinstance(value, list):
q_condition_queries.add(Q(**{'value__in': value}), Q.OR)
else:
q_condition_queries.add(Q(**{'value': value}), Q.OR)
pf = ProductFeatures.objects.filter(
q_condition_queries
).prefetch_related('product', 'feature').values('product_id')
qs = qs.filter(id__in=[pf_['product_id'] for pf_ in pf])
return qs