I have an order form which displays available items which are attached to a Catalog object. Instead of displaying the available items, it is currently only displaying the field name of available instead of the the items available. Is there a way to target the values in the crispy form? Similar to how it is done in the template like:
{% for i in catalog.annual_products.all %}
Here is my form:
from crispy_forms.helper import FormHelper
from crispy_forms.layout import Layout, ButtonHolder, Submit
from . import models
class OrderListForm(forms.ModelForm):
class Meta:
fields = ('order_lines',)
model = models.Order
def __init__(self, *args, **kwargs):
super(OrderListForm, self).__init__(*args, **kwargs)
self.helper = FormHelper()
self.helper.layout = Layout(
'order_lines',
ButtonHolder(
Submit('create', 'Create')
)
)
Here is my model:
class Catalog(models.Model):
products = models.CharField(max_length=200)
def __unicode__(self):
return self.products
class Issue(models.Model):
catalog = models.ForeignKey(Catalog, related_name='issue_products')
Volume = models.DecimalField(max_digits=3, decimal_places=1)
def __unicode__(self):
return unicode(self.catalog)
class Annual(models.Model):
catalog = models.ForeignKey(Catalog, related_name='annual_products')
year_id = models.IntegerField(max_length=4)
start_date = models.CharField(max_length=6)
end_date = models.CharField(max_length=6)
def __unicode__(self):
return unicode(self.year_id)
class Annual_Issue(models.Model):
annual_id = models.ForeignKey(Annual, related_name='annual_ids')
issue_id = models.ForeignKey(Issue, related_name='issues')
def __unicode__(self):
return self.annual_id
class Article(models.Model):
catalog = models.ForeignKey(Catalog, related_name='article_products')
title = models.CharField(max_length=200)
abstract = models.TextField(max_length=1000, blank=True)
full_text = models.TextField(blank=True)
proquest_link = models.CharField(max_length=200, blank=True, null=True)
ebsco_link = models.CharField(max_length=200, blank=True, null=True)
def __unicode__(self):
return self.title
class Order(models.Model):
user = models.ForeignKey(User, related_name='who_ordered')
order_lines = models.ForeignKey(Catalog, related_name='items_ordered')
This is what I'm currently returning in the template: (which is just the name of the products field in Catalog)
Related
I have a listview where I'm trying to filter out products by category. Some products have a subcategory. When a product has a subcategory I want the listview to display them by subcategory.
Problem is: The listview works perfect for items with a subcategory, but does not work for items who do not have a subcategory. Where am I taking a wrong turn here?
Models:
class Category(models.Model):
category_name = models.CharField(max_length=200)
sub_category = models.CharField(max_length=200,blank=True,null=True)
category_picture = ResizedImageField(upload_to='category/', null=True, blank=True)
category_info = models.TextField(blank=True, null=True)
category_video = models.CharField(max_length=250,blank=True, null=True)
def __str__(self):
if self.sub_category is None:
return self.category_name
else:
return f" {self.sub_category}"
class Meta:
ordering = ['category_name']
class Bottle(models.Model):
category_name = models.ForeignKey('Category', on_delete=models.SET_NULL,null=True,blank=True)
brand = models.ForeignKey('Brand', on_delete=models.CASCADE)
bottle_name = models.CharField(max_length=255)
bottle_info = models.TextField()
bottle_tasting_notes = models.TextField()
bottle_barcode = models.IntegerField()
bottle_image = ResizedImageField(upload_to='bottles/',null=True, blank=True)
bottle_shop_link = models.CharField(max_length=250, null=True, blank=True)
def __str__(self):
return f"{self.brand}, {self.bottle_name}"
class Meta:
ordering = ['bottle_name']
View:
class BottlesByCategoryView(ListView):
model = Bottle
context_object_name = 'bottles'
#Filter bij subcategory in the category model. If no subcategory exists, load by category_name
def get_queryset(self):
if Bottle.objects.filter(category_name__sub_category=self.kwargs['category']) is None:
return Bottle.objects.filter(category_name__category_name=self.kwargs['category'])
else:
return Bottle.objects.filter(category_name__sub_category=self.kwargs['category'])
def get_context_data(self, **kwargs):
context = super(BottlesByCategoryView, self).get_context_data(**kwargs)
if Bottle.objects.filter(category_name__sub_category=self.kwargs['category']) is None:
context['category_info'] = Category.objects.filter(category_name=self.kwargs['category'])
else:
context['category_info'] = Category.objects.filter(sub_category=self.kwargs['category'])
return context
URLS:
path('BottlesByCategory/<str:category>/',BottlesByCategoryView.as_view(template_name='academy/bottlesByCat_list.html'),name='bottlesByCat_list'),
Can i not use if statements in the get_context_data and get_query_set?
I have a model form that creates a new job entry, and on submission, I need an invisible field job_time_estimation to be set to a sum of 'service_stats_estimate_duration' values from ServiceItemStats objects associated with the JobEntry by a many-to-many relationship when submitting the form.
For example, if in my NewJobEntryForm I chose two existing ServiceItemStats objects that have service_stats_estimate_duration values 60 and 90, on submission, I want a value 150 to be saved in that JobEntry object's job_time_estimation attribute.
I tried doing this using aggregation by defining a save() method in the model but I am getting an error "name 'serviceItemStats' is not defined".
I am not sure if I am going about this the right way. Any help would be appreciated.
My code:
models.py:
class ServiceItemStats(models.Model):
service_stats_name = models.CharField(primary_key=True, max_length=20)
service_stats_estimate_duration = models.IntegerField()
# Many-to-many relationship with JobEntry.
def __str__(self):
return self.service_stats_name
class JobEntry(models.Model):
# PK: id - automatically assigned by Django.
jo
b_entry_date_time = models.DateTimeField(default=timezone.now)
jo
b_date = models.DateField(blank=True, null=True)
job_checked_in = models.BooleanField()
job_checked_out = models.BooleanField(default=False)
job_priority = models.IntegerField()
job_time_estimation = models.IntegerField(blank=True, null=True)
job_comments = models.TextField(max_length=200, blank=True, null=True)
job_parts_instock = models.BooleanField(default=False)
job_started = models.BooleanField(default=False)
job_finished = models.BooleanField(default=False)
job_expand_fault_evidence = models.ImageField(blank=True, null=True)
job_expand_comments = models.ImageField(blank=True, null=True)
job_expand_parts_required = models.CharField(max_length=200, blank=True, null=True)
vehicle = models.ForeignKey(Vehicle, on_delete=models.CASCADE) #One-to-one relationship
customer = models.ForeignKey(Customer, on_delete=models.CASCADE) #One-to-one relationship
serviceBay = models.ForeignKey(ServiceBay, on_delete=models.CASCADE, blank=True, null=True) #One-to-one relationship
serviceItemStats = models.ManyToManyField(ServiceItemStats, blank=True) #Many-to-many relationship
def __str__(self):
return self.id
def save(self, *args, **kwargs):
if not self.job_time_estimation:
self.job_time_estimation = serviceItemStats.objects.all().aggregate('service_stats_estimate_duration')
return super().save(*args, **kwargs)
def get_absolute_url(self):
return reverse("jobs:job_detail",kwargs={'pk':self.pk})
views.py
class JobCreateView(FormView):
template_name = "jobs/jobentry_form.html"
form_class = NewJobEntryForm
success_url = reverse_lazy("jobs:job_list")
def form_valid(self, form):
form.save()
return super(job_list, self).form_valid(form)
forms.py
class NewJobEntryForm(ModelForm):
class Meta:
model = JobEntry
fields = ['vehicle', 'customer', 'job_date', 'job_checked_in', 'job_priority', 'job_comments', 'job_parts_instock', 'serviceItemStats']
widgets = {
'job_date' : forms.DateInput(format=('%m/%d/%Y'), attrs={'class':'form-control', 'placeholder':'Select a date', 'type':'date'}),
'ServiceItemStats' : forms.CheckboxSelectMultiple(),
'job_priority' : forms.RadioSelect(choices=priorityOptions),
}
You can try this.
from django.db.models import Sum
class JobCreateView(FormView):
template_name = "jobs/jobentry_form.html"
form_class = NewJobEntryForm
success_url = reverse_lazy("jobs:job_list")
def form_valid(self, form):
job=form.save()
estimation = job.serviceItemStats.all().aggregate(total=Sum('service_stats_estimate_duration'))
job.job_time_estimation = estimation['total']
job.save()
return super(job_list, self).form_valid(form)
I'm making online shopping mall using Django(1.9.7) framework.
I think that showing codes is much easier than explaining in text.
models.py
class Product(TimeStampedModel):
name = models.CharField(max_length=120, unique=True)
slug = models.SlugField(null=True, blank=True)
description = models.TextField(max_length=400, blank=True)
is_active = models.BooleanField(default=True)
def __str__(self):
return self.name
class Variation(TimeStampedModel):
COLOR_CHOICES = (
('black', '흑백'),
('single', '단색'),
('multi', '컬러'),
)
price = models.DecimalField(
decimal_places=0,
max_digits=15,
blank=True,
null=True,
)
product = models.ForeignKey(Product)
color = models.CharField(
max_length=10,
choices=COLOR_CHOICES,
)
is_active = models.BooleanField(default=True)
class Meta:
unique_together = (('product', 'color'))
def __str__(self):
return str(self.product) + ' - ' + self.get_color_display()
I create form in my product_detail view and pass it as context data to template.
views.py
class ProductDetailView(DetailView):
model = Product
context_object_name = "product"
def get_context_data(self, *args, **kwargs):
context = super().get_context_data(*args, **kwargs)
product = self.get_object()
context['cartitem_form'] = CartItemForm(product)
return context
What I want to do through form:
I want to show variations only related with given product. So I pass product as argument of form in view and save this product. And I'm trying to set the variation queryset through ModelChoiceField:
class CartItemForm(forms.ModelForm):
variation = forms.ModelChoiceField(
queryset=Variation.objects.filter(product=self.product)
)
class Meta:
model = CartItem
fields = (
'variation',
'width',
'height',
'quantity',
)
def __init__(self, *args, **kwargs):
self.product = kwargs.pop('product')
super().__init__(*args, **kwargs)
def save(self):
cart_item = super().save(commit=False)
cart_item.save()
return cart_item
but it doesn't work. How can I implement this?
I have an order form which returns this statement of submit:
Cannot assign "<Annual: 2012>": "Order.annuals" must be a "Catalog" instance.
I'm fairly new to Django. I understand it needs an instance instead of the string it has been passed. How would I go about resolving that?
Here is my view:
class OrderListCreateView(
views.LoginRequiredMixin,
views.SetHeadlineMixin,
generic.CreateView
):
form_class = forms.OrderListForm
headline = 'Create'
model = Order
template_name = 'ordercreate.html'
def form_valid(self, form):
self.object = form.save(commit=False)
self.object.user = self.request.user
self.object.save()
return super(OrderListCreateView, self).form_valid(form)
Here is my form:
class OrderListForm(forms.ModelForm):
annuals = forms.ModelChoiceField(queryset=Annual.objects.all())
issues = forms.ModelChoiceField(queryset=Issue.objects.all())
articles = forms.ModelChoiceField(queryset=Article.objects.all())
class Meta:
fields = (
'annuals',
'issues',
'articles',)
model = models.Order
def __init__(self, *args, **kwargs):
super(OrderListForm, self).__init__(*args, **kwargs)
self.helper = FormHelper()
self.helper.layout = Layout(
'annuals',
'issues',
'articles',
ButtonHolder(
Submit('create', 'Create')
)
)
Here is my model:
class Catalog(models.Model):
products = models.CharField(max_length=200)
def __unicode__(self):
return self.products
class Issue(models.Model):
catalog = models.ForeignKey(Catalog, related_name='issue_products')
Volume = models.DecimalField(max_digits=3, decimal_places=1)
def __unicode__(self):
return unicode(self.Volume)
class Annual(models.Model):
catalog = models.ForeignKey(Catalog, related_name='annual_products')
year_id = models.IntegerField(max_length=4)
start_date = models.CharField(max_length=6)
end_date = models.CharField(max_length=6)
def __unicode__(self):
return unicode(self.year_id)
#def __unicode__(self):
# return unicode(self.id)
class Annual_Issue(models.Model):
annual_id = models.ForeignKey(Annual, related_name='annual_ids')
issue_id = models.ForeignKey(Issue, related_name='issues')
def __unicode__(self):
return self.annual_id
class Article(models.Model):
catalog = models.ForeignKey(Catalog, related_name='article_products')
title = models.CharField(max_length=200)
abstract = models.TextField(max_length=1000, blank=True)
full_text = models.TextField(blank=True)
proquest_link = models.CharField(max_length=200, blank=True, null=True)
ebsco_link = models.CharField(max_length=200, blank=True, null=True)
def __unicode__(self):
return self.title
class Order(models.Model):
user = models.ForeignKey(User, related_name='who_ordered')
annuals = models.ForeignKey(Catalog, related_name='annuals_ordered', blank=True, null=True)
issues = models.ForeignKey(Catalog, related_name='issues_ordered', blank=True, null=True)
articles = models.ForeignKey(Catalog, related_name='items_ordered', blank=True, null=True)
In your Order model, you have defined a ForeignKey relationship for several other models (Annual, Issue, and Article), but each of these relationships points to the Catalog model. When you attempt to save the Order instance created by your form, it has received objects of these types (Annual, Issue, and Article), but it cannot store a foreign-key reference to these objects in the fields defined on the Order model. This is due to the foreign-key fields on the Order demanding that they can only contain a reference to Catalog objects.
If, for each of these foreign-key relationships, you wish to store one of these various kinds of objects, you will need to alter your Order model definition to expect references to objects of those models rather than Catalog objects.
In brief, I would suggest that the Order model be modified to include the following relationships. This will allow an order object to store a single reference to an object of each other kind (Annual, Issue, and Article).
annuals = models.ForeignKey(Annual, related_name='annuals_ordered', blank=True, null=True)
issues = models.ForeignKey(Issue, related_name='issues_ordered', blank=True, null=True)
articles = models.ForeignKey(Article, related_name='items_ordered', blank=True, null=True)
For more information about ForeignKey relationships in Django, see the reference here.
I have a form for submitting an order. Multiple items have been attached to a catalog object, I'd like to have the form dropdown contain options for all of the items attached to the foreign key, instead of the foreign key Catalog name of Available. I know how to access these in the view, using the related name, is this possible in forms?
Here is my current form:
from django import forms
from crispy_forms.helper import FormHelper
from crispy_forms.layout import Layout, ButtonHolder, Submit
from . import models
class OrderListForm(forms.ModelForm):
class Meta:
fields = ('order_lines',)
model = models.Order
def __init__(self, *args, **kwargs):
super(OrderListForm, self).__init__(*args, **kwargs)
self.helper = FormHelper()
self.helper.layout = Layout(
'order_lines',
ButtonHolder(
Submit('create', 'Create')
)
)
Here is my model:
class Catalog(models.Model):
products = models.CharField(max_length=200)
def __unicode__(self):
return self.products
class Issue(models.Model):
catalog = models.ForeignKey(Catalog, related_name='issue_products')
Volume = models.DecimalField(max_digits=3, decimal_places=1)
def __unicode__(self):
return unicode(self.catalog)
class Annual(models.Model):
catalog = models.ForeignKey(Catalog, related_name='annual_products')
year_id = models.IntegerField(max_length=4)
start_date = models.CharField(max_length=6)
end_date = models.CharField(max_length=6)
def __unicode__(self):
return unicode(self.year_id)
class Annual_Issue(models.Model):
annual_id = models.ForeignKey(Annual, related_name='annual_ids')
issue_id = models.ForeignKey(Issue, related_name='issues')
def __unicode__(self):
return self.annual_id
class Article(models.Model):
catalog = models.ForeignKey(Catalog, related_name='article_products')
title = models.CharField(max_length=200)
abstract = models.TextField(max_length=1000, blank=True)
full_text = models.TextField(blank=True)
proquest_link = models.CharField(max_length=200, blank=True, null=True)
ebsco_link = models.CharField(max_length=200, blank=True, null=True)
def __unicode__(self):
return self.title
class Order(models.Model):
user = models.ForeignKey(User, related_name='who_ordered')
order_lines = models.ForeignKey(Issue, related_name='items_ordered')
you can access all the Annuals and Articles that are in the same catalog by using:
c = Catalog.objects.get(....
c.article_products_set.all()
c.annual_products_set.all()