Develop Reference

how to concate variables in url_for jinja2 flask? [duplicate]

I have a route defined like this:
#app.route('/magic/<filename>')
def moremagic(filename):
pass
And now in a template I want to call that route using url_for() like so:
<h1>you uploaded {{ name }}<h1>
Click to see magic happen
I have tried:
Click to see magic happen
That throws a jinja2.TemplateSyntaxError: expected token ':' got }
Can anyone suggest how to get the {{ name }} that appears in the template into the url_for() so that when I click I call the correct app.route?

Everything inside the {{ ... }} is a Python-like expression. You don't need to use another {{ ... }} inside that to reference variables.
Drop the extra brackets:
<h1>you uploaded {{ name }}<h1>
Click to see magic happen
(Note that the url_for() function takes the endpoint name, not a URL path; the name defaults to the name of the function, moremagic in your example).

passing a variable to selectattr in jinja2 [duplicate]

I have a route defined like this:
#app.route('/magic/<filename>')
def moremagic(filename):
pass
And now in a template I want to call that route using url_for() like so:
<h1>you uploaded {{ name }}<h1>
Click to see magic happen
I have tried:
Click to see magic happen
That throws a jinja2.TemplateSyntaxError: expected token ':' got }
Can anyone suggest how to get the {{ name }} that appears in the template into the url_for() so that when I click I call the correct app.route?

Everything inside the {{ ... }} is a Python-like expression. You don't need to use another {{ ... }} inside that to reference variables.
Drop the extra brackets:
<h1>you uploaded {{ name }}<h1>
Click to see magic happen
(Note that the url_for() function takes the endpoint name, not a URL path; the name defaults to the name of the function, moremagic in your example).

Format date with Jinja2 and python

i need to format this date on the template because comes from the database on a dictionary.
I got this date displayed on my template:
1996-08-22
And i want to be like this:
22-08-1996
here is my code for it :
{{date['Fundação'] }}
I try to use with strftime but i got an error:
{{date['Fundação']|strftime('%d-%m-%Y')}}
The error:
jinja2.exceptions.TemplateAssertionError: no filter named 'strftime'

You can implement a python function that will handle the date.
You can consume it from your template.
Example:
def reverse_date(a_date):
d = a_date.split('-')
d.reverse()
reverse_d = '-'.join(d)
return reverse_d
template = Template('your template')
template.globals['reverse_date'] = reverse_date
# now you can use it in your template
{{ reverse_date(date['Fundação']) }}

You can treat variables in a jinja2 template as Python ones. To change the date format use the datetime build-in method, not a filter:
{{date['Fundação'].strftime('%d-%m-%Y')}}

How to parse "2015-01-01T00:00:00Z" in Django Template?

In my Django html template, I get my SOLR facet_date result using haystack in the format
"2015-01-01T00:00:00Z". How can I parse it in format "01/01/2015" in my template?
My template is
{{ facets.dates.created.start }}
What "|date:" option should I add to my template?
Thanks!

If your date is a ISO string instead of a Python datetime.datetime, I guess you will have to parse it on the view or write a custom filter:
# yourapp/templatetags/parse_iso.py
from django.template import Library
import datetime
register = Library()
#register.filter(expects_localtime=True)
def parse_iso(value):
return datetime.datetime.strptime(value, "%Y-%m-%dT%H:%M:%SZ")
Then at the template:
{% load parse_iso %}
{{ value|parse_iso|date:'d/m/Y'}}
[edit]
got this error Exception Type: TemplateSyntaxError at /search/ Exception Value: 'parse_iso' is not a valid tag library: Template library parse_iso not found
Make sure you follow the code layout prescribed in the docs:
yourapp/
__init__.py
models.py
...
templatetags/
__init__.py
parse_iso.py
views.py
Your country may use m/d/Y (01/01/2015 is ambiguous, I suggest using an example like 31/01/2015 so it is clear if the first number represents day or month).

If {{ facets.dates.created.start }} is a datetime object then you can use
{{ facets.dates.created.start|date:"SHORT_DATE_FORMAT" }}
In case you are providing a string you can create a template filter to convert the string to datetime object and apply the date filter
#register.filter
def stringformat(value, args):
return datetime.strptime(value, args)
In the template:
{{ facets.dates.created.start|stringformat:"%Y-%m-%dT%H:%M:%SZ"|date:"SHORT_DATE_FORMAT" }}

You can use Django template tags for this. You need to use {{my_date|date:"some_format"}} which takes "my_date" as the argument (it should be a date object) to "date" tag and then formats it based on the given format.
{{facets.dates.created.start|date:"d/m/Y"}}

Django remove leading zero

In a Django template how do I remove the first Zero from all the this mobile numbers I'm displaying. In Python I have tried this but with no success....
{% for object in data %}
{{ object.mobile.lstrip('0') }}
{% endfor %}
views.py
def sms(request, incentive):
objectQuerySet = Recipient.objects.filter(incentiveid=incentive)
context = {'data':objectQuerySet}
return render_to_response('smssend.html', context, context_instance=RequestContext(request))

There are many ways to do that.
write custom template filter
filter user input and store phones with leading zeros already stripped
create a custom object #property returning mobile with zeroes stripped (this one a little bit dirty)
do cleanup before rendering template

I assume you will need to use similar logic in other locations of your application so why not just add a method to your model to clean the data? The code below assumes your mobile field is a string.
class Recipient(models.Model):
...
def mobile_no_zero(self):
return self.mobile[1:] if self.mobile.startswith('0') else self.mobile
And then you can call the method from your template:
{% for object in data %}
{{ object.mobile_no_zero }}
{% endfor %}

You should pass your data to your template in the correct format. Django templates are not "Python interspersed with HTML" like PHP is.
For example, when you first pass your data in your view, you should make sure that it is an iterable with the zeroes already stripped.
There is no lstrip in the Django template mini-language.
Edit: If you know that the first digit will always be a 0, you can also do this:
{{ object|slice:"1:" }}

There is one method that does work (but is more of a kludge that anything and removes 0 or more 0s) - and only if the number can be converted to a float to start with (ie, no spaces)
In [23]: t = Template('{{ value|floatformat:0 }}')
In [24]: t.render(Context({'value': '00123'}))
Out[24]: u'123'

You can use cut ( it will cut all zeros from number )
or you can use
phone2numeric
Imo its beter opption