I have created a model in Django as shown below
class work(models.Model):
Image = models.FileField()
text = models.CharField(max_length=10000)
sub_text = models.CharField(max_length=10000)
color=models.CharField(max_length=200)
opacity = models.CharField(max_length=200)
link =models.CharField(max_length=10000)
grid_column = models.CharField(max_length=10000,blank=True)
category = models.CharField(max_length=200,default=all)
def __str__(self):
return '{}'.format(self.text)
and while am trying to add values to that models through admin panel it throws the below error
TypeError at /admin/mysite/work_dummy/add/
all() takes exactly one argument (0 given)
Can anyone help me to solve this
max_length for CharField is 255 so whatever you put in Model will not effect that in database, If you want to add more than that use TextField and also default takes a string or int, but since you have use all variable and i cant see a definition of that, i assume that wrong
class work(models.Model):
Image = models.FileField(upload_to='media',blank=True)
text = models.TextField()
sub_text = models.TextField()
color=models.CharField(max_length=200)
opacity = models.CharField(max_length=200)
link =models.TextField()
grid_column = models.TextField(blank=True)
category = models.CharField(max_length=200,default='all')
def __str__(self):
return '{}'.format(self.text)
Related
I want to make code field should be auto filled and auto increment in django admin.
models.py
class GeneralDocumentType(models.Model):
code = models.CharField(max_length=10, null=False, unique=True)
name = models.CharField(max_length=100, null=False, unique=True)
description = models.TextField(blank=True, null=True)
def __str__(self):
return self.name
I want to show my code field default=DOC001, and it will show increment by 1 before adding data by user.How can I achieve this?..
Django ModelAdmin has support for get_changeform_initial_data. In your admin you can override this method to get value based on the latest id info. For example:
class YourModelAdmin(admin.ModelAdmin):
...
def get_changeform_initial_data(self, request):
# getting the latest id
try:
latest_document_type = GeneralDocumentType.object.latest('id')
latest_id = latest_document_type.id + 1
except GeneralDocumentType.DoesNotExist:
# incase there no object yet
latest_id = 0
return {'code': f'DOC{latest_id}'}
Note: this only work for adding new object, ModelAdmin. Doesn't work for InlineModelAdmin
I am Django rest framework to return the list of objects who do not have a foreign key in another table. what queryset should I write to get those objects.
models.py
class Event(models.Model):
id = models.IntegerField(primary_key=True)
title = models.CharField(max_length=100,default='')
description = models.TextField(blank=True,default='', max_length=1000)
link = models.URLField(null=True)
image = models.ImageField(null=True, blank=True)
organizer = models.CharField(max_length=100, default='')
timings = models.DateTimeField(default=None)
cost = models.IntegerField(default=1,null=True,blank=True)
def __str__(self):
return self.title
class Featured(models.Model):
event = models.ForeignKey(Event, null=True ,on_delete=models.PROTECT, related_name="event")
def __str__(self):
return self.event.title
class Meta:
verbose_name_plural = 'Featured'
views.py
class Upcoming2EventsViewSet(mixins.RetrieveModelMixin,mixins.ListModelMixin,viewsets.GenericViewSet):
serializer_class = Upcoming2Events
def get_queryset(self):
featured_events = Featured.objects.all().values_list('id')
return Event.objects.filter(id__in=featured_events)
# return Event.objects.exclude(id__in=featured_events.event.id)
# # return Event.objects.exclude(id__in = [featured_events.id])
serializers.py
class Upcoming2Events(serializers.ModelSerializer):
id = serializers.CharField(source='event.id')
title = serializers.CharField(source='event.title')
timings = serializers.DateTimeField(source='event.timings')
organizer = serializers.CharField(source='event.organizer')
class Meta:
model = Featured
fields = ['id','title','organizer','timings']
Error
Got AttributeError when attempting to get a value for field `id` on serializer `Upcoming2Events`.
The serializer field might be named incorrectly and not match any attribute or key on the `Event` instance.
Original exception text was: 'RelatedManager' object has no attribute 'id'.
Can you tell me what queryset should I write to get the only objects which are not present in the table Featured?
Also, what should I do to get only the upcoming 2 events from the Event table which are not present in the Featured table?
Note I am not supposed to use any flag value, can you provide some other solutions?
Based on the Informations you wrote here, i would suggest using a flag to determine a featured event. A second Model is useful if you want to provide more Informations on this specific for a featured event
like this:
class Event(models.Model):
id = models.IntegerField(primary_key=True)
title = models.CharField(max_length=100,default='')
description = models.TextField(blank=True,default='', max_length=1000)
link = models.URLField(null=True)
image = models.ImageField(null=True, blank=True)
organizer = models.CharField(max_length=100, default='')
timings = models.DateTimeField(default=None)
cost = models.IntegerField(default=1,null=True,blank=True)
featured = models.BooleanField(default=False)
so you can directly use querysets to get what you want:
Event.objects.exclude(featured=True)
Event.objects.exclude(featured=True).order_by('-timings')[:2]
I would use ModelViewsets directly, hence you will use your model here.
views and serializers would look like this:
views.py
class Upcoming2EventsViewSet(viewesets.ReadyOnlyModelViewSet):
serializer_class = EventSerializer
queryset = Event.objects.exclude(featured=True).order_by('-timings')[:2]
serializers.py
class EventSerializer(serializers.ModelSerilizer):
class Meta:
model = Event
fields = ['id', 'title', 'organizer', 'timings']
As improvement i would provide filters instead of setting up different ViewSets for just filtering querysets.
In our project, i've been making use of the latest version of django-nested-inlines v0.3.7 with django 1.7
I have the following definition in my django admin to display the inlines
class SpecsGroupedContentInline(NestedStackedInline):
model = SpecificationGroupedContent
extra = 1
fk_name = "specification"
fields = ["field_unit"]
class SpecsContentInline(NestedStackedInline):
model = SpecificationListContent
extra = 1
fk_name = "specification"
fields = ["content"]
class SpecsInline(NestedStackedInline):
model = Specification
inlines = [SpecsContentInline, SpecsGroupedContentInline]
extra = 1
fk_name = "product"
class ProductAdmin(NestedModelAdmin):
inlines = [
SpecsInline
]
list_display = ('name', 'sku')
form = ProductAdminForm
When the page loads, the page looks like this
Initial product page load
It's a bit hard to see but the specs section has a title, an inline for Listed Contents and an inline for Grouped Contents. Afterwards, there's an empty Specs section with an empty title, empty Listed Contents, and empty Grouped Contents.
When I press the "Add another Specification" button at the bottom of the Specification inline to add a new row, the result of the new entry looks like this
New Specification entry image
As you can see, the Grouped Content field "Field Unit" is missing. I'm not sure if my setup is incorrect, but i found this stack overflow entry with a similar setup to mine
Django nested inlines not working?
It is for a different error though but we have a similar inline setup so i was thinking this setup is ok for django-nested-inlines.
Also, I'm sure if it's related but is django-nested-inlines affected if a nested inline model is a foreign key of another model? The SpecificationsGroupedContent model is a foreign key of another model unlike the SpecificationsListContent. I did a quick test where the SpecsInline inlines contained either SpecsGroupedContentInline only or SpecsContentInline only. It was working perfectly when using only SpecsContentInline but the error occurs when using SpecsGroupedContentInline.
For reference, here are the models I'm using with the related model for SpecsGroupedContent
class Product(AuthorStampedModel):
name = models.CharField(max_length=100)
sku = models.CharField(unique=True, max_length=100, verbose_name='SKU')
summary = models.TextField(blank=True, default="")
def __unicode__(self):
return self.return_product_details()
def return_product_details(self):
return '%s: %s' % (self.sku, self.name)
class Specification(models.Model):
product = models.ForeignKey('Product', related_name='specs')
title = models.CharField(max_length=100)
def __unicode__(self):
return self.return_spec_string()
def return_spec_string(self):
return '%s: %s' % (self.product.return_product_details(), self.title)
class SpecificationListContent(models.Model):
specification = models.ForeignKey('Specification', related_name='list_content')
content = models.CharField(max_length=255)
class Meta:
verbose_name_plural = 'Specification Listed Contents'
def __unicode__(self):
return self.specification.return_spec_string()
class SpecificationGroupedContent(models.Model):
specification = models.ForeignKey('Specification', related_name='group_content')
field_unit = models.CharField(max_length=255)
class Meta:
verbose_name_plural = 'Specification Grouped Contents'
def __unicode__(self):
return self.specification.return_spec_string()
class SpecificationGroupedContentValue(models.Model):
specification_grouped_content = models.ForeignKey(
'SpecificationGroupedContent',
related_name='group_content_value'
)
value = models.CharField(max_length=255)
class Meta:
verbose_name_plural = 'Specification Grouped Content Values'
def __unicode__(self):
return self.specification_grouped_content.specification.return_spec_string()
Thanks
I have the following models in Django:
class campaign(models.Model):
start_date = models.DateField('Start Date')
end_date = models.DateField('End Date')
description = models.CharField(max_length=500)
name = models.CharField(max_length=200)
active_start_time = models.TimeField()
active_end_time = models.TimeField()
last_updated = models.DateTimeField('Date updated',auto_now=True)
active = models.BooleanField(default=True)
client_id = models.ForeignKey('client',on_delete=models.PROTECT)
def __unicode__(self):
return u'%d | %s | %s' % (self.id,self.name, self.description)
class campaign_product(models.Model):
product_id = models.ForeignKey('product',on_delete=models.PROTECT)
last_updated = models.DateTimeField('Date updated',auto_now=True)
campaign_id = models.ForeignKey('campaign',on_delete=models.PROTECT)
class product(models.Model):
name = models.CharField(max_length=200)
description = models.CharField(max_length=500)
sku = models.CharField(max_length=200,blank=True,null=True)
retail_price = models.DecimalField(decimal_places=2,max_digits=11)
discount_price = ((1,'Yes'),(0,'No'))
discounted_price = models.DecimalField(decimal_places=2,max_digits=11,blank=True,null=True)
category_id = models.ForeignKey('category',on_delete=models.PROTECT)
last_updated = models.DateTimeField('Date updated',auto_now=True)
active = models.BooleanField(default=True)
def __unicode__(self):
return u'%d | %s' % (self.id, self.name)
I also have the following serializer:
class campaignProductSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model = campaign_product
fields = ('product_id', 'campaign_id')
And the following view set behavior in the urls.py file:
class campaignProductViewSet(viewsets.ModelViewSet):
queryset = campaign_product.objects.filter(campaign_id__start_date__lte=datetime.now(),campaign_id__end_date__gte=datetime.now(),campaign_id__active__exact=True)
serializer_class = campaignProductSerializer
My problem is I need to include the name field from the products model in my query results when for instance a request is made on http://127.0.0.1:8000/campaign_product/1/. Currenly this request returns only the product_id and the campaign_id. I tried making the serializer as follows:
class campaignProductSerializer(serializers.HyperlinkedModelSerializer):
class Meta:
model = campaign_product
fields = ('product_id', 'campaign_id', 'product.name')
But then the service returns the following error:
Field name `product.name` is not valid for model `campaign_product`.
I event tried using product__name with and without quotes. Without quotes it tells me that there is no such variable, and with quotes it gives the is not valid for model error similar to the above. Heeelp! Getting this extra field is proving to be a pain :-(
What you want will need to look something more like this:
class campaignProductSerializer(serializers.HyperlinkedModelSerializer):
product_name = serializers.CharField(source='product_id.name')
class Meta:
model = campaign_product
fields = ('product_id', 'campaign_id', 'product_name')
P.S. As an unrelated side note, it is generally a convention in Python code to name classes with CamelCase, such as Campaign, CampaignProduct, Product, and CampaignProductSerializer.
Edit: P.P.S. Originally, I had put written the product_name field with source='product.name'. This was actually due to me looking at the code too quickly and making assumptions based on Django conventions. Typically, with a Django ForeignKey, you would name the ForeignKey field after the model you are linking to, rather than explicitly naming it with _id. For example, the CampaignProduct model would typically be written with product = ForeignKey(...) and campaign = ForeignKey(...). In the background, Django will actually use product_id and campaign_id as the database field names. You also have access to those names on your model instances. But the product and campaign variables on your model instances actually return the objects which you are referring to. Hopefully that all makes sense.
I have the following models:
class Quiver(models.Model):
user = models.ForeignKey(settings.AUTH_USER_MODEL)
is_default = models.BooleanField(default=False)
type = models.CharField(max_length=1, choices=QUIVER_TYPES)
category = models.CharField(max_length=255, choices=QUIVER_CATEGORIES)
def __unicode__(self):
return u'[%s] %s %s quiver' % (
self.user.username,
self.get_type_display(),
self.get_category_display())
class Image(models.Model):
photo = models.ImageField(upload_to=get_upload_file_path)
is_cover = models.BooleanField(default=False)
content_type = models.ForeignKey(ContentType)
object_id = models.PositiveIntegerField()
content_object = generic.GenericForeignKey()
def save(self, *args, **kwargs):
try:
this = Image.objects.get(pk=self.pk)
if this.photo != self.photo:
this.photo.delete(save=False)
except Image.DoesNotExist:
pass
super(Image, self).save(*args, **kwargs)
class Surfboard(models.Model):
quiver = models.ForeignKey(Quiver)
brand = models.CharField(max_length=255)
model = models.CharField(max_length=255)
length = models.CharField(max_length=255)
width = models.CharField(max_length=255, blank=True)
thickness = models.CharField(max_length=255, blank=True)
volume = models.CharField(max_length=255, blank=True)
images = generic.GenericRelation(Image)
def __unicode__(self):
return u'%s %s %s' % (self.length, self.brand, self.model)
def get_cover_image(self):
"Returns the cover image from the images uploaded or a default one"
for image in self.images.all():
if image.is_cover:
return image
return None
I'd like to be able to have the same form I have in the admin in my frontend view /surfboard/add:
As a new Django fan and user, I started to create the form from scratch. Not being able to do what I want with including the foreign key "quiver" as a dropdown list, I found in the doc the ModelForm, and decided to use it, so here what I got:
class SurfboardForm(ModelForm):
class Meta:
model = Surfboard
In my view, it looks like this and it's already a good start:
So now, I wanted to have a way to add pictures at the same time, and they are linked to a surfboard via a Generic Relation. Here I don't find the way to do a implementation like in the admin, and get frustrated. Any tips to do so?
Thanks!
What you seek is called an inline formset - see the docs for more.
It's also handy that you can render a formset quickly with {{ formset.as_p }}, but you'll need to write some JavaScript (or use the JavaScript that's used in the Django admin) to handle adding and removing forms.