I'm trying to use the mptt library for a simple nested comment system.
My Model
class Comment(MPTTModel):
event = models.ForeignKey(Event)
author = models.CharField(max_length=60)
comment = models.TextField()
added = models.DateTimeField(default=timezone.now())
parent = TreeForeignKey('self', null=True, blank=True, related_name='children')
class MPTTMeta:order_insertion_by = ['added']
Right now, if I use {% recursetree nodes %} template tag, it displays the nodes in ascending time based on 'added'. I want to display the root notes by descending time, the newest comments first. I tried sorting nodes so it is descending, but recursetree does not follow that order. Is there a way to specify a descending ordering? I tried ['-added'], but it does not work.
Download updated version of django-mptt from github - It will allow you to use descending order the way you wanted. For example:
class Comment(MPTTModel):
event = models.ForeignKey(Event)
author = models.CharField(max_length=60)
comment = models.TextField()
added = models.DateTimeField(default=timezone.now())
parent = TreeForeignKey('self', null=True, blank=True, related_name='children')
class MPTTMeta:
order_insertion_by = ['-added']
Related
I'm trying to webscrape a page with about 20 articles, but for some reason the spider is only finding the information needed for the very first article. How do I make it scrape every article on the page?
I've tried changing the xpaths multiple times, but I think that I'm too new to this to be sure what the issue is. When I take all the paths out of the for loop it scraps everything well, but its not in a format that allows me to transfer the data to a csv file.
import scrapy
class AfgSpider(scrapy.Spider):
name = 'afg'
allowed_domains = ['www.pajhwok.com/en']
start_urls = ['https://www.pajhwok.com/en/security-crime']
def parse(self, response):
container = response.xpath("//div[#id='taxonomy-page-block']")
for x in container:
title = x.xpath(".//h2[#class='node-title']/a/text()").get()
author = x.xpath(".//div[#class='field-item even']/a/text()").get()
rel_url = x.xpath(".//h2[#class='node-title']/a/#href").get()
yield{
'title' : title,
'author' : author,
'rel_url' : rel_url
}
You can use this code to collect required information:
import scrapy
class AfgSpider(scrapy.Spider):
name = 'test'
allowed_domains = ['www.pajhwok.com/en']
start_urls = ['https://www.pajhwok.com/en/security-crime']
def parse(self, response):
container = response.css("div#taxonomy-page-block div.node-article")
for x in container:
title = x.xpath(".//h2[#class='node-title']/a/text()").get()
author = x.xpath(".//div[#class='field-item even']/a/text()").get()
rel_url = x.xpath(".//h2[#class='node-title']/a/#href").get()
yield{
'title': title,
'author': author,
'rel_url': rel_url
}
The problem was that you code container = response.xpath("//div[#id='taxonomy-page-block']")
returns only one row, it's because id should be unique within the whole page, class can be the same for a few tags
Nice answer provided by #Roman. Another options to fix your script :
.Declaring the right XPath for your loop step :
container = response.xpath("//div[#class='node-inner clearfix']")
. Or, remove your loop step and use .getall() method to fetch the data :
title = response.xpath(".//h2[#class='node-title']/a/text()").getall()
author = response.xpath(".//div[#class='field-item even']/a/text()").getall()
rel_url = response.xpath(".//h2[#class='node-title']/a/#href").getall()
I have a search api
class SearchViewSet(RetrieveModelViewSet):
serializer_class = ArticleSerializer
queryset = Article.objects.all()
query = self.request.query_params.get("query")
final_queryset = search(query,queryset,#some logic)
#logic to generate serialiser and return serialiser.data
serialiser = self.get_serializer(final_ueryset, many=True)
search function returns a list of articles i.e
type(final_queryset) is List
And. I wan't to return the articles order_by('count) as well.
Now I wan't to increase the count of top 3 articles from the final_queryset is there a way of doing this.
Add created_at field in your model, then use this field to find top 3 item or latest 3 items like this, and then increase count
queryset = Article.objects.order_by('-created_at')[:3] # it will return a queryset of latest 3 items
for article in queryset:
article.count += 1
article.save()
serializer = ArticleSerializer(article)
Note: I only shared the logic part here, and i can't test it in my local, but it should work and help you to get the idea. Use it on your need.
Figured out a way for doing this
Just simply iterate on the list and increment the count of the objects in the list
class SearchViewSet(RetrieveModelViewSet):
serializer_class = ArticleSerializer
queryset = Article.objects.all()
query = self.request.query_params.get("query")
final_queryset = search(query,queryset,#some logic)
# to increment the count of top 3 entity_aliases
for instance in final_queryset[:3]:
instance.count += 1
instance.save()
#logic to generate serialiser and return serialiser.data
serialiser = self.get_serializer(final_ueryset, many=True)
I have problems with the following queryset, I probe it in django shell and it returns an empty list.
The situation is that I'm occupying a lforeing key, I did the same exercise with the model "Tarifa_Sem" and returns the value without any problem, just replace the F ('') by a variable x = 1000
The situation is that the table of the model "Tarifa_Sem" is only for consultation.
Where I am going to manage and save the response of the queryset is in the "Calculadora_isr" model
Model 1
class Tarifa_Sem(models.Model):
limite_inferior_isr = models.DecimalField(max_digits=10, decimal_places=2)
limite_inferior_subsidio = models.DecimalField(max_digits=10, decimal_places=2)
limite_superior = models.DecimalField(max_digits=10, decimal_places=2)
Model 2
class Calculadora_isr(models.Model):
tarifa = models.ForeignKey(Tarifa_Sem, on_delete=models.CASCADE, blank=True)
base_gravada = models.DecimalField(max_digits=10, decimal_places=2, blank=True)
limite_inf_calculo = models.DecimalField(max_digits=10, decimal_places=2, blank=True)
Queryset and save()
def limite_inferior(self):
queryset = Calculadora_isr.objects.filter(tarifa__limite_superior__gte=F('base_gravada'),tarifa__limite_inferior_isr__lte=F('base_gravada')).distinct().values('tarifa__limite_inferior_isr')
return queryset
def save(self):
self.limite_inf_calculo = self.limite_inferior
super (Calculadora_isr, self).save()
In the shell of django the list appears empty.
>>> queryset = Calculadora_isr.objects.filter(tarifa__limite_superior__gte=F('base_gravada'),tarifa__limite_inferior_isr__lte=F('base_gravada')).distinct().values('tarifa__limite_inferior_isr')
And in the admin when I give him save he tells me:
conversion from method to Decimal is not supported
thanks for the support
I finally found the solution.
To solve the problem of passing the "base_gravada" field, use another variable that returns all the values of "base_gravada"
qs1 = Calculadora_isr.objects.values_list('base_gravada')
And in my second query, use the variable qs1:
qs2 = Tarifa_Sem.objects.filter(limite_superior__gte=qs1,limite_inferior_isr__lte=qs1).distinct().values('limite_inferior_isr')
This post should be a little more complex than usual.
We have created a new field for an account.invoice.line : pack_operation. With this field, we can print serial/lot number for each line on the PDF invoice (this part works well).
Many hours passed trying to write the domain to select the EXACT and ONLY stock pack operation for each invoice line.
In the code below, we used the domain [('id','=', 31)] to make our tests printing the PDF.
Ho to write this domain to be sure at 100 % that we will get the right stock pack operation for each invoice line?
I really need your help here... Too complex for my brain.
Our code :
class AccountInvoiceLine(models.Model):
_inherit = "account.invoice.line"
pack_operation = fields.Many2one(comodel_name='stock.pack.operation', compute='compute_stock_pack_operation_id')
def compute_stock_pack_operation_id(self):
stock_operation_obj = self.env['stock.pack.operation']
stock_operation = stock_operation_obj.search( [('id','=', 31)] )
self.pack_operation = stock_operation[0]
EDIT#1
I know that you won't like my code. But, this one seems to work. I take any comments and improvements with pleasure.
class AccountInvoiceLine(models.Model):
_inherit = "account.invoice.line"
pack_operation = fields.Many2one(comodel_name='stock.pack.operation', compute='compute_stock_pack_operation_id')#api.one
def compute_stock_pack_operation_id(self):
procurement_order_obj = self.env['procurement.order']
stock_operation_obj = self.env['stock.pack.operation']
all_picking_ids_for_this_invoice_line = []
for saleorderline in self.sale_line_ids:
for procurement in saleorderline.procurement_ids:
for stockmove in procurement.move_ids:
if stockmove.picking_id.id not in all_picking_ids_for_this_invoice_line
all_picking_ids_for_this_invoice_line.append(stockmove.picking_id.id)
all_picking_ids_for_this_invoice_line))
stock_operation = stock_operation_obj.search(
[ '&',
('picking_id','in',all_picking_ids_for_this_invoice_line),
('product_id','=',self.product_id.id)
]
)
self.pack_operation = stock_operation[0]
The pack_operation field is a computed field, that be default means that the field will not be saved on the database unless you set store=True when you define your field.
So, what you can do here is change:
pack_operation = fields.Many2one(comodel_name='stock.pack.operation', compute='compute_stock_pack_operation_id')
to:
pack_operation = fields.Many2one(comodel_name='stock.pack.operation', compute='compute_stock_pack_operation_id', store=True)
And try running your query again.
I'm trying to create a field “complete_name” that displays a hierarchy name similar to whats done on the product categories grid but I can't seem to get it to work. It just puts Odoo in an endless loading screen when I access the relevant view using the new field "complete_name".
I have tried to copy the code used in addons/product/product.py and migrate to work with Odoo 9 API by using compute instead of .function type but it did not work.
Can someone help me understand whats wrong? Below is my model class which works fine without the complete_name field in my view.
class cb_public_catalog_category( models.Model ):
_name = "cb.public.catalog.category"
_parent_store = True
parent_left = newFields.Integer( index = True )
parent_right = newFields.Integer( index = True )
name = newFields.Char( string = 'Category Name' )
child_id = newFields.One2many( 'catalog.category', 'parent_id', string = 'Child Categories' )
complete_name = newFields.Char( compute = '_name_get_fnc', string = 'Name' )
def _name_get_fnc( self ):
res = self.name_get( self )
return dict( res )
Your compute function is supposed to define the value of an attribute of your class, not return a value. Ensure the value you are assigning complete_name is a string.
Also name_get() returns a tuple. I am not sure if you really want a string representation of this tuple or just the actual name value.
Try this
def _name_get_fnc( self ):
self.complete_name = self.name_get()[1]
If you really want what is returned by name_get() then try this.
def _name_get_fnc( self ):
self.complete_name = str(self.name_get())
If you are still having issues I would incorporate some logging to get a better idea of what you are setting the value of complete_name to.
import logging
_logger = logging.getLogger(__name__)
def _name_get_fnc( self ):
_logger.info("COMPUTING COMPLETE NAME")
_logger.info("COMPLETE NAME: " + str(self.name_get()))
self.complete_name = self.name_get()
If this does not make it apparent what the issue is you could always try statically assigning it a value in the off chance that there is a problem with your view.
def _name_get_fnc( self ):
self.complete_name = "TEST COMPLETE NAME"
After further review I think I have the answer to my own question. It turns out as with a lot of things its very simple.
Simply use "_inherit" and inherit the product.category
model. This gives access to all the functions and fields
of product.category including the complete_name field
and computes the name from my custom model data. I was
able to remove my _name_get_func and just use the inherited
function.
The final model definition is below. Once this
update was complete I was able to add a "complete_name" field
to my view and the results were as desired!
class cb_public_catalog_category( models.Model ):
_name = "cb.public.catalog.category"
_inherit = 'product.category'
_parent_store = True
parent_left = newFields.Integer( index = True )
parent_right = newFields.Integer( index = True )
name = newFields.Char( string = 'Category Name' )
child_id = newFields.One2many( 'catalog.category', 'parent_id', string = 'Child Categories' )