I have a model like this in Django:
class File(models.Model):
users = models.ForeignKey(User)
file_name = models.CharField(max_length=100)
type = models.CharField(max_length=10)
source = models.CharField(max_length=100)
start_date = models.TextField()
end_date = models.TextField()
duration = models.TextField()
size = models.TextField()
flag = models.TextField()
#delete_date = models.CharField(max_length=100, null=True, blank=True)
class Share(models.Model):
users = models.ForeignKey(User)
files = models.ForeignKey(File)
shared_user_id = models.IntegerField()
shared_date = models.TextField()
I am trying to extract the file shared by logged in user. I simply query in Share
file_s = Share.objects.filter(users_id=log_id)
This extracts the file shared by logged in user. Since, now I know which file is shared by logged in user I tried to get the file information from file table:
shared_file = File.objects.filter(users_id=file_s)
But this is returning:
DatabaseError at /shared_by_me/
(1242, 'Subquery returns more than 1 row')
#my_views
def shared_by_me(request):
log_id = request.user.id
username = request.user.username
#shared_file = File.objects.filter(users_id=file)
file_s = Share.objects.filter(users_id=log_id)
shared_file = File.objects.filter(users_id=file_s)
#b = Share.objects.filter(users_id=log_id)
return render_to_response('shared_by_me.html', {'shared_by_me':shared_file, 'username':username}, context_instance=RequestContext(request))
#my_template
{% for choice in shared_by_me %}
<tr class="oddclass">
<td><input type="checkbox" name="choice" id="choice{{ forloop.counter }}" value="{{ choice.id }}" /></td>
<td><label for="choice{{ forloop.counter }}">{{ choice.file_name }}</label></td>
<td>{{ choice.type }}</td>
<td>{{ i.size }}</td>
<td>{{ i.end_date }}</td>
</tr>
{% endfor %}
What am I doing wrong?
Because file is not a model but a queryset you should use __in, something like:
shared_file = File.objects.filter(users_id__in=file_s)
Related
I am very new in django.
Situation is like this
I have a model
class Slotmodels (models.Model):
modelid = models.AutoField(primary_key=True)
model_desc = models.TextField()
categoryid = models.ForeignKey(categories, on_delete=models.CASCADE)
shopid = models.ForeignKey(shops, on_delete=models.CASCADE)
brandid = models.ForeignKey(brands, on_delete=models.CASCADE)
reference = models.CharField(max_length=50,null=True)
history = models.TextField(null=True)
year = models.IntegerField(null=True)
purchase_price = models.FloatField(default=0)
actual_price = models.FloatField(default=0)
limited_edition = models.BooleanField(null=False,default=False)
color = models.CharField(max_length=50,null=True)
number = models.IntegerField(null=True)
livery = models.CharField(max_length=50,null=True)
sponsor = models.CharField(max_length=50,null=True)
scale = models.CharField(max_length=10,null=True)
engine = models.CharField(max_length=20,null=True)
eng_position = models.CharField(max_length=20,null=True)
crown = models.IntegerField(null=True)
pinion = models.IntegerField(null=True)
crown_bnd = models.CharField(max_length=20,null=True)
pinion_bnd = models.CharField(max_length=20,null=True)
active = models.BooleanField(default=True)
chasis = models.CharField(max_length=20,null=True)
rear_axis = models.CharField(max_length=30,null=True)
front_axis = models.CharField(max_length=30,null=True)
front_tire_diam = models.IntegerField(null=True)
rear_tire_diam = models.IntegerField(null=True)
front_tire_width = models.IntegerField(null=True)
rear_tire_width = models.IntegerField(null=True)
collection_desc = models.CharField(max_length=30,null=True)
bench_desc = models.CharField(max_length=30,null=True)
Total_weight = models.IntegerField(null=True)
def __str__(self):
return self.modelid, self.model_desc
With a form based on that model:
class FormAltaSlotModel(ModelForm):
class Meta:
model = Slotmodels
fields = ['modelid','model_desc','categoryid','shopid','brandid','reference','history','year','purchase_price',
'actual_price','limited_edition','color','number','livery','sponsor','scale','engine','eng_position',
'crown','pinion','crown_bnd','pinion_bnd','active','chasis','rear_axis','front_axis','front_tire_diam',
'rear_tire_diam','front_tire_width','rear_tire_width','collection_desc','bench_desc','Total_weight']
help_texts = {
}
widgets = {
'history': Textarea(attrs={'cols': 30, 'rows': 2}),
'model_desc': Textarea(attrs={'cols': 30, 'rows': 2})
}
When I instance the form to create a record, is everything ok!. It is important to say that I have three foreignkey fields so when I render the form , the list values of the model referenced appear in the screen. And, the values are recorded properly (in the related Id fields).
The point is when I tried to update a record previously recorded. In the screen appear the descriptions and the list is not appearing, then the values that are passed to the form are descriptions instead of the codes, so the message "Select a valid choice. That choice is not one of the available choices.", appear for the three foreignkey fields that are 'categoryid','shopid','brandid'.
I have tried to fix it, but with no success. Thanks in advance!
Here I tried to do full CRUD with your MODEL & MODELFORM
view.py
def InsertData(request):
my_data = Slotmodels.objects.all() # Show data of Student Table
if request.method == 'POST':
form = FormAltaSlotModel(request.POST,request.FILES)
if form.is_valid():
form.save()
messages.success(request,'Student Successfully Inserted')
return redirect('/')
else:
form = FormAltaSlotModel()
context= {'form':form,'my_data':my_data}
return render(request,'home.html',context)
def UpdateData(request,modelid):
my_data = Slotmodels.objects.all() # Show data of Student Table
set_student = Slotmodels.objects.get(modelid=modelid)
if request.method == 'POST':
form = FormAltaSlotModel(request.POST,request.FILES,instance=set_student)
if form.is_valid():
form.save()
messages.success(request,'Student Successfully Updated')
return redirect('/')
else:
form = FormAltaSlotModel(instance=set_student)
context= {'form':form,'my_data':my_data}
return render(request,'home.html',context)
def DeleteData(request,modelid):
set_student = Slotmodels.objects.get(modelid=modelid)
set_student.delete()
messages.success(request,'Student Successfully Deleted')
return redirect('/')
urls.py
urlpatterns = [
path('', InsertData,name='insert_data'),
path('up/<int:modelid>/', UpdateData,name='update_data'),
path('del//<int:modelid>/', DeleteData,name='delete_data'),
]
HTML Code
<div class="container my-5">
<div class="row">
<div class="col-12">
<form action="" method="POST">
{% csrf_token %}
{{form.as_p}}
<button type="submit">Add</button>
</form>
</div>
<div class="col-12">
<table class="table">
<thead>
<tr>
<th scope="col">No.</th>
<th scope="col">Categories</th>
<th scope="col">Shops</th>
<th scope="col">Brands</th>
<th scope="col">Actions</th>
</tr>
</thead>
<tbody>
{% for i in my_data %}
<tr>
<td>{{forloop.counter}}</td>
<td>{{i.categoryid}}</td>
<td>{{i.shopid}}</td>
<td>{{i.brandid}}</td>
<td>
Update
Delete
</td>
</tr>
{% endfor %}
</tbody>
</table>
</div>
</div>
</div>
Output
I'm stuck with the issue that I need to insert the list [ ] in the model field while using SQLite,
Group_Model.py:
class ClassificationGroup(models.Model):
vendor_id = models.ForeignKey(Vendor, on_delete=models.CASCADE, default=None, null=True)
id = models.IntegerField(primary_key=True)
name = models.CharField(max_length=100)
description = models.CharField(max_length=1000)
classification_id = models. [what do i take here to make it capable to store list of ids that will be related to the classification table.]
Classification_Model.py
class Classification(models.Model):
id = models.IntegerField()
name = models.CharField(max_length=100)
description = models. CharField(max_length=1000)
domain_name = models.CharField(max_length=200)
i just want to store the list of classification in the one field of the Classification Group Mentioned above, Please help me out in this.
Add a method to your class to convert it automatically.
import json
class ClassificationGroup(models.Model):
#...
classification_id = models.CharField(max_length=200)
def set_classification_id (self, lst):
self.classification_id = json.dumps(lst)
def get_classification_id (self):
return json.loads(self.classification_id)
your view:
obj = ClassificationGroup.objects.create(name="name",**data)
obj.set_classification_id([1,2,3])
obj.save()
#there are several examples of using this method
your HTML:
{% for obj in objects %}
{{ obj.name }}
{{ obj.get_classification_id }}
{% endfor %}
my question seems tricky to me, but i'm certain someone could derive a solution to it. i've a boolean field, but i want to add a functionality in which when the boolean is been clicked (True), i could implement an {% if %} and {% else %} which could be, add a particular amount to the original amount, if the boolean field is True. my code is below for proper understanding...
class OrderItem(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
ordered = models.BooleanField(default=False)
item = models.ForeignKey(Item, on_delete=models.CASCADE)
paper = models.BooleanField(default=False, blank=True)
def get_final_price(self):
if self.item.discount_price:
return self.get_total_discount_price()
return self.get_total_item_price()
def coverframe(self):
return get_final_price() + 3000
class Order(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL, on_delete=models.CASCADE)
item = models.ManyToManyField(OrderItem)
def __str__(self):
return self.user.username
def get_total_everything(self):
total = 0
for order_item in self.item.all():
total += order_item.get_final_price()
return total
def get_total_everything_cover_paper(self):
total = 0
for order_item in self.item.all():
total += order_item.coverframe()
return total
Views
class OrderSummary(LoginRequiredMixin, View):
def get(self, *args, **kwargs):
try:
******
context = {'object':order}
??????
except ObjectDoesNotExist:
messages.error(self.request, "No active order yet, sorry!!!")
return redirect('/')
and my html
{% if object.item.paper_frame %}
<tr>
<td><b>{{object.get_total_everything_cover_paper}}</b></td>
</tr>
<tr>
{% else %}
{% if object.get_total_everything %}
<tr>
<td><b>N {{object.get_total_everything}}</b></td>
</tr>
<tr>
{% endif %}
{% endif %}
I have product with image but when i try show image only this product django show me all image product how i can fix it ? I try wite slice don't work beacuse if i do |slice:"0:1" show me image but not image this product.
class Product(models.Model):
category = models.ForeignKey(Category, related_name='product')
name = models.CharField(max_length=200, db_index=True)
slug = models.SlugField(max_length=200, db_index=True)
image = models.ImageField(upload_to='product/%Y/%m/%d',
blank=True)
description = models.TextField(blank=True)
price = models.DecimalField(max_digits=10, decimal_places=2)
stock = models.PositiveIntegerField()
available = models.BooleanField(default=True)
promo = models.BooleanField(default=False)
news = models.BooleanField(default=True)
section = models.CharField(max_length=50, choices=SECTION_CHOICES, default=None)
detailimage = models.ImageField(upload_to='product/detail/%Y/%m/%d',
blank=True)
detailimagetwo = models.ImageField(upload_to='product/detail/%Y/%m/%d',
blank=True)
class Meta:
ordering = ('name',)
index_together = (('id', 'slug'),)
def __str__(self):
return self.name
#property
def image_url(self):
if self.image and hasattr(self.image, 'url'):
return self.image.url
#property
def detail_url(self):
if self.detailimage and hasattr(self.detailimage, 'url'):
return self.detailimage.url
#property
def detailtwo_url(self):
if self.detailimagetwo and hasattr(self.detailimagetwo, 'url'):
return self.detailimagetwo.url
def get_absolute_url(self):
return reverse('shop:product_detail',
args=[self.id, self.slug])
My views.py
def product_detail(request, id, slug):
product = get_object_or_404(Product,
id=id,
slug=slug,
available=True)
products = Product.objects.all()
return render(request,
'shop/product/detail.html',
{'product': product,
'products': products})
and my detail.html
{% extends "shop/base.html" %}
{% load static %}
{% block title %}{{ product.name }}{% endblock %}
{% block content %}
{% for p in products %}
<img src="{{p.detail_url}}" class="img-responsive">
{% endfor %}
</div>
</div>
{% endblock %}
if u want somethink more comment and i will how fast i can add it .
change your view
def product_detail(request, id, slug):
product = get_object_or_404(Product,
id=id,
slug=slug,
available=True)
return render(request,
'shop/product/detail.html',
{'product': product})
and in template change
{% for p in products %}
to
{% for p in product %}
you can solve the problem by removing one 's' in template but i suggest change the view function as mentioned
in case your using Pillow not just the address of image as string change this
{{p.detail_url}}
to
{{p.fieldname.url}}
models.py
class Author(models.Model):
first_name = models.CharField(max_length=30)
last_name = models.CharField(max_length=40)
email = models.EmailField()
age = models.IntegerField()
def __unicode__(self):
return "{0} {1} {2} {3} {4}".format(
self, self.first_name, self.last_name, self.email, self.age)
class Book(models.Model):
book_name=models.CharField(max_length=30)
publisher_name=models.CharField(max_length=40)
author=models.ForeignKey(Author)
def __unicode__(self):
return "{0} {1} {2}".format(
self.pk, self.book_name, self.publisher_name)
forms.py
class AuthorForm(ModelForm):
class Meta:
model = Author
BookFormset = inlineformset_factory(Author, Book,
fields=('book_name', 'publisher_name'), extra=1,
can_delete=False)
urls.py is
admin.autodiscover()
urlpatterns = patterns('',
url('^$', index),
url('^index/$', index),
url('^addbook/$', addbook),
url('^book_detail/$', book_detail, 'book_summary'),
url('^editbook/(?P<book_id>\d+)/$', editbook) ,
url('^deletebook/(?P<book_id>\d+)/$',deletebook) ,
url(r'^admin/', include(admin.site.urls)),
)
I need to perform edit and update the row in database,i did it by using single table.But using two table have some confusion how to take 2nd table using that particular id.I am using forms in this.Can you help me in this to write codes in views.py.Example for doing the same using two table is no where i seen.
Thanks
def update_book(request, book_id):
author = get_object_or_404(Author, pk=author_id)
form = AuthorForm(instance=author)
book_formset = BookFormset(instance=author)
if request.method == 'POST':
form = AuthorForm(request.POST, instance=author)
if form.is_valid():
author = form.save(commit=False)
book_formset = BookFormset(request.POST, instance=author)
if book_formset.is_valid():
author.save()
book_formset.save()
return redirect('/index/')
return render_to_response('updatebook.html',{
'form': form, 'formset': book_formset
},context_instance=RequestContext(request))
<div align="center">
<tr>
<form method="POST">
{% csrf_token %}
<h5>Author:</h5>
{{ form.as_p }}
<h5>Book:</h5>
{{ formset.as_p }}
<input type="submit" value="submit">
</form>
</tr>
</div>