We Keep Coding

Replace all spaces to dash in all my "url" object from my article model

I would like to replace all the spaces in my defined url objects from my Article model to "-". However, my code below doesn't seem to work.
def index(request):
change_urls = Article.objects.all()
for i in change_urls:
i.url.replace(" ", "-")
i.save()

.replace(..) creates a new string, it does not modify the string. You can thus work with:
def index(request):
change_urls = list(Article.objects.all())
for i in change_urls:
i.url = i.url.replace(' ', '-')
Article.objects.bulk_update(change_urls, fields=('url',))
# …
But if you want to "slugify", please use the slugify(…) function [Django-doc].

Django Rest framework - I am trying to convert a property received in Response object to JSON object and iterate through it. But response is string

In views.py VENDOR_MAPPER is list of dictionary each dictionary has id, name, placeholder and autocommit key. I also tried sending json instead of Response object.
resp_object = {}
resp_object['supported_vendors'] = VENDOR_MAPPER
resp_object['vendor_name'] = ""
resp_object['create_vo_entry'] = False
resp_object['generate_signature_flag'] = False
resp_object['branch_flag'] = False
resp_object['trunk_flag'] = False
resp_object['branch_name'] = ""
resp_object['advisory'] = ""
data = {'data': resp_object}
return Response(data)
On home.html I am accessing the vendors_supported which is list and iterate through it, however instead of object i am getting string as type of variable.
var supported_vendors = "{{data.supported_vendors|safe}}";
console.log(supported_vendors);
console.log("Supported_vendors ", supported_vendors);
console.log("Supported_vendors_type:", typeof(supported_vendors));
data.supported_vendors|safe (django template tagging) is used to remove the unwanted characters in the response i have also tried without safe, but still the type was string
also tried converted as well as parse the response but type is shown as string
var supported_vendors = "{{data.supported_vendors}}";
console.log(JSON.parse(supported_vendors));
console.log(JSON.stringify(supported_vendors));
Output generated, i have printed the response type and values i get, also converting using JSON.parse and JSON.stringify did not work and output every time was string
[1]: https://i.stack.imgur.com/DuSMb.png
I want to convert the property into javascript object and perform some computations

You can try this instead ,
return HttpResponse(json.dumps(data),
content_type="application/json")

I got the answer:
var supported_vendors = "{{data.supported_vendors}}";
Converted the above line to
var supported_vendors = {{data.supported_vendors}};
removed quotes from the variable

Django : invalid date format with Pandas - \xa0

I would like to create objects from a CSV file with Django and Pandas.
Everything is fine for FloatFields and CharFields but when I want to add DateFields, Django returns this error: ['The date format of the value "\xa02015/08/03\xa0" is not valid. The correct format is YYYY-MM-DD.']
However, the CSV file proposes this type of data for the columns concerned: '2015/08/03'. There is no space in the data as Django seems to suggest...
here is what I tried in views :
class HomeView(LoginRequiredMixin, View):
def get(self, request,*args, **kwargs):
user = User.objects.get(id=request.user.id)
Dossier.objects.filter(user=user).delete()
csv_file = user.profile.user_data
df = pd.read_csv(csv_file, encoding = "UTF-8", delimiter=';', decimal=',')
df = df.round(2)
row_iter = df.iterrows()
objs = [
Dossier(
user = user,
numero_op = row['N° Dossier'],
porteur = row['Bénéficiaire'],
libélé = row['Libellé du dossier'],
descriptif = row["Résumé de l'opération"],
AAP = row["Référence de l'appel à projet"],
date_dépôt = row["Date Dépôt"],
date_réception = row["Accusé de réception"],
montant_CT = row['Coût total en cours'],
)
for index, row in row_iter
]
Dossier.objects.bulk_create(objs)
If I change my Model to CharField, I no longer get an error.
I tried to use the str.strip() function:
df["Date Dépôt"]=df["Date Dépôt"].str.strip()
But without success.
Could someone help me? I could keep the CharField format but it limits the processing of the data I want to propose next.

It seems that you have some garbage in that file, in particular your date is surrounded by a byte "\xa0" on either side.
In some encodings this byte denotes a "non breaking space", which may be why you're not seeing it.

Django CursorPagination for ordering by several fields

I am using Django DRF's CursorPagination for lazy loading of my data, and currently my goal is to sort the data by more than one field.
This is how my code looks like now:
class EndlessPagination(CursorPagination):
ordering_param = ''
def set_ordering_param(self, request):
self.ordering = request.query_params.get(self.ordering_param, None)
if not self.ordering:
raise ValueError('Url must contain a parameter named ' +
self.ordering_param)
if self.ordering.startswith("\"") or self.ordering.endswith("\""):
raise ValueError('Ordering parameter should not include quotation marks'
def paginate_queryset(self, queryset, request, view=None):
# This function is designed to set sorting param right in the URL
self.set_ordering_param(request)
return super(EndlessPagination, self).paginate_queryset(queryset, request, view)
This code works fine for urls like my_url/sms/270380?order_by=-timestamp, but what if I want to sort by several fields ?

Use str.split() to split the url params
class EndlessPagination(CursorPagination):
ordering_param = 'order_by'
def set_ordering_param(self, request):
ordering_param_list = request.query_params.get(self.ordering_param, None)
self.ordering = ordering_param_list.split(',')
# here, "self.ordering" will be a "list", so, you should update the validation logic
"""
if not self.ordering:
raise ValueError('Url must contain a parameter named ' +
self.ordering_param)
if self.ordering.startswith("\"") or self.ordering.endswith("\""):
raise ValueError('Ordering parameter should not include quotation marks'
"""
def paginate_queryset(self, queryset, request, view=None):
# This function is designed to set sorting param right in the URL
self.set_ordering_param(request)
return super(EndlessPagination, self).paginate_queryset(queryset, request, view)
Example URLs
1. my_url/sms/270380?order_by=-timestamp
2. my_url/sms/270380?order_by=-timestamp,name
3. my_url/sms/270380?order_by=-name,foo,-bar
UPDATE-1
First of all thanks to you for giving a chance to dig deep :)
As you said, me too didn't see comma seperated query_params in popular APIs. So, Change the url format to something like,my_url/sms/270380??order_by=-name&order_by=foo&order_by=-bar
At this time, the request.query_params['order_by'] will be a list equal to ['-name','foo','-bar']. So, you don't want to use the split() function, hence your set_ordering_param() method become,
def set_ordering_param(self, request):
self.ordering = request.query_params.get(self.ordering_param, None)
#...... your other validations

Restful API with web.py

In PHPs Slim I can do this:
$app->get('/table/{table}', function (Request $request, Response $response, $args) {
$table = $args['table'];
$mapper = new TableMapper($this, $table);
$res = $mapper->getTable();
return $response->withJson($res);
}
$app->get('/table/{table}/{id}', function (Request $request, Response $response, $args) {
$table = $args['table'];
$id = (int)$args['id'];
$mapper = new TableMapper($this, $table);
$res = $mapper->getTableById($id);
return $response->withJson($res);
}
Now I'm trying with web.py. I can do this:
urls = (
'/table/(.+)', 'table',
)
class table:
def GET( self, table ):
rows = db.select( table )
web.header('Content-Type', 'application/json')
return json.dumps( [dict(row) for row in rows], default=decimal_default )
but if I try to extend this by doing, e.g.:
urls = (
'/table/(.+)', 'table',
'/table/(.+)/(\d+)', 'table_by_id'
)
Processing never arrive at the second of the urls. Instead the code does a db.select on a table name which is "table/id", which of course errors.
How can I develop this to parse a url with id added?

web.py matches in order listed in urls, so switching the order is one way to solve your issue:
urls = (
'/table/(.+)/(\d+)', 'table_by_id',
'/table/(.+)', 'table'
)
Another piece of advice: Tighten up your regex, so you match more closely exactly what you're looking for. You'll find bugs sooner.
For example, you'll note your /table/(.+) will indeed match "/table/foo/1", because the regex .+ also matches /, so you might consider a pattern like ([^/]+) to match "everything" except a slash.
Finally, no need for a leading '^' or trailing '$' in your URLs, web.py always looks to match the full pattern. (Internally, it adds '^' and '$').

Try this one:
urls = (
'^/table/(.+)/$', 'table',
'^/table/(.+)/(\d+)/$', 'table_by_id'
)