Re: [Django] #34098: Filter floatformat drops precision in decimal numbers

[Django]

#34098: Filter floatformat drops precision in decimal numbers
-+-
 Reporter:  Vlastimil Zíma   |Owner:  Vlastimil
 |  Zíma
 Type:  Bug  |   Status:  closed
Component:  Template system  |  Version:  dev
 Severity:  Normal   |   Resolution:  fixed
 Keywords:   | Triage Stage:  Ready for
 |  checkin
Has patch:  1|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by GitHub ):

 * status:  assigned => closed
 * resolution:   => fixed


Comment:

 In [changeset:"08c5a787262c1ae57f6517d4574b54a5fcaad124" 08c5a787]:
 {{{
 #!CommitTicketReference repository=""
 revision="08c5a787262c1ae57f6517d4574b54a5fcaad124"
 Fixed #34098 -- Fixed loss of precision for Decimal values in floatformat
 filter.

 Regression in 12f7928f5a455e330c0a7f19bc86b37baca12811.
 }}}

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Ticket URL: 
Django 
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Re: [Django] #34098: Filter floatformat drops precision in decimal numbers

[Django]

#34098: Filter floatformat drops precision in decimal numbers
-+-
 Reporter:  Vlastimil Zíma   |Owner:  Vlastimil
 |  Zíma
 Type:  Bug  |   Status:  assigned
Component:  Template system  |  Version:  dev
 Severity:  Normal   |   Resolution:
 Keywords:   | Triage Stage:  Ready for
 |  checkin
Has patch:  1|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by Mariusz Felisiak):

 * stage:  Accepted => Ready for checkin


Comment:

 Regression in 12f7928f5a455e330c0a7f19bc86b37baca12811.

-- 
Ticket URL: 
Django 
The Web framework for perfectionists with deadlines.

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Re: [Django] #34098: Filter floatformat drops precision in decimal numbers

[Django]

#34098: Filter floatformat drops precision in decimal numbers
-+-
 Reporter:  Vlastimil Zíma   |Owner:  Vlastimil
 |  Zíma
 Type:  Bug  |   Status:  assigned
Component:  Template system  |  Version:  dev
 Severity:  Normal   |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  1|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+-
Changes (by Vlastimil Zíma):

 * owner:  nobody => Vlastimil Zíma
 * status:  new => assigned


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Ticket URL: 
Django 
The Web framework for perfectionists with deadlines.

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Re: [Django] #34098: Filter floatformat drops precision in decimal numbers

[Django]

#34098: Filter floatformat drops precision in decimal numbers
-+
 Reporter:  Vlastimil Zíma   |Owner:  nobody
 Type:  Bug  |   Status:  new
Component:  Template system  |  Version:  dev
 Severity:  Normal   |   Resolution:
 Keywords:   | Triage Stage:  Accepted
Has patch:  1|  Needs documentation:  0
  Needs tests:  0|  Patch needs improvement:  0
Easy pickings:  0|UI/UX:  0
-+
Changes (by Mariusz Felisiak):

 * stage:  Unreviewed => Accepted


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Ticket URL: 
Django 
The Web framework for perfectionists with deadlines.

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[Django] #34098: Filter floatformat drops precision in decimal numbers

[Django]

#34098: Filter floatformat drops precision in decimal numbers
---+
   Reporter:  Vlastimil Zíma   |  Owner:  nobody
   Type:  Bug  | Status:  new
  Component:  Template system  |Version:  dev
   Severity:  Normal   |   Keywords:
   Triage Stage:  Unreviewed   |  Has patch:  1
Needs documentation:  0|Needs tests:  0
Patch needs improvement:  0|  Easy pickings:  0
  UI/UX:  0|
---+
 I discovered that `floatformat` template filter may drop precision when
 used for `Decimal` numbers.

 MWE:
 {{{
 #!python
 from decimal import Decimal

 from django import setup
 from django.conf import settings
 from django.template import Template, Context

 TEMPLATES = [
 {
 'BACKEND': 'django.template.backends.django.DjangoTemplates',
 },
 ]
 settings.configure(TEMPLATES=TEMPLATES)
 setup()

 t = Template('{{ value|floatformat:20 }}')
 c = Context({'value': Decimal('42.12345678901234567890')})
 print(t.render(c))  #>>> 42.1234567890123440
 }}}

 I traced the bug to incorrect conversion to `Decimal` within the
 `floatformat` implementation that can't really work for `Decimal` numbers.
 `Decimal` numbers are converted to float instead.

 Pull request is prepared https://github.com/django/django/pull/15863

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Ticket URL: 
Django 
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