#29273: MultipleChoiceField incorrectly selects the empty value for an empty 
form
----------------------------------+------------------------------------
     Reporter:  Tim Kleinschmidt  |                    Owner:  nobody
         Type:  Bug               |                   Status:  new
    Component:  Forms             |                  Version:  1.11
     Severity:  Release blocker   |               Resolution:
     Keywords:                    |             Triage Stage:  Accepted
    Has patch:  0                 |      Needs documentation:  0
  Needs tests:  0                 |  Patch needs improvement:  0
Easy pickings:  0                 |                    UI/UX:  0
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Changes (by Tim Graham):

 * severity:  Normal => Release blocker
 * stage:  Unreviewed => Accepted


Comment:

 The difference can be seen here:
 {{{
 from django import forms
 choices = [('', '(no extra)'), ('cheese', 'Cheese'), ('Pepper', 'Pepper')]
 class Form(forms.Form):
     extra_topics = forms.MultipleChoiceField(required=False,
 choices=choices)

 form = Form()
 print(form)
 }}}
 The first option renders as `<option value="" selected>(no
 extra)</option>` in Django 1.11+ but without `selected` in older versions.

-- 
Ticket URL: <https://code.djangoproject.com/ticket/29273#comment:3>
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