設置複選框的初始值動態

Question

我有一個MultipleChoiceField與CheckboxSelectMutliple部件：

weight_training_days = forms.MultipleChoiceField(
    help_text=u'(Required) 3 days must be selected', 
    widget=forms.CheckboxSelectMultiple(attrs={ 
     'inline': True, 
    }), 
    choices=(
     (0, "Mon"), 
     (1, "Tue"), 
     (2, "Wed"), 
     (3, "Thu"), 
     (4, "Fri"), 
     (5, "Sat"), 
     (6, "Sun"), 
    ), 
) 

什麼我想是動態設置7個複選框「真」的3。理想情況下，我會從視角做到這一點。

def change_challenge_settings_page(request): 

    c = Challenge.objects.get(user__exact = request.user,chal_status=1) 

    layout = 'horizontal' 
    form =UpdateChallengeSettingsForm(initial={'goal': c.level_goal }) 

    return render(request, 'portal/portal_change_challenge_settings.html', {'form': form,'layout': layout,'scorecard_page': True,}) 

我知道如何與ChoiceFields做到這一點（在上面的「目標」的例子是ChoiceField），但我堅持，當談到MultipleChoiceFields。我真的很感激任何想法/反饋。

Answer 1

您可以將初始設置爲列表。在這種情況下，如果您設置了YourForm(inital={'weight_training_days': [0,1,2]})它將默認選擇星期一，星期二和星期三。你也可以這樣做forms.MultipleChoiceField(... inital=[0,1,2] ...)

Answer 2

這很簡單，只需通過一個列表。這裏有一個完整的例子：

from django import forms 
class UpdateChallengeSettingsForm(forms.Form): 
    weight_training_days = forms.MultipleChoiceField(
     help_text=u'(Required) 3 days must be selected', 
     widget=forms.CheckboxSelectMultiple(attrs={ 
      'inline': True, 
     }), 
     choices=(
      (0, "Mon"), 
      (1, "Tue"), 
      (2, "Wed"), 
      (3, "Thu"), 
      (4, "Fri"), 
      (5, "Sat"), 
      (6, "Sun"), 
     ), 
    ) 

form = UpdateChallengeSettingsForm(initial={ 
    'weight_training_days': [1,2,4,5,6], 
}) 

print form.as_p() 

和輸出：

<p><label for="id_weight_training_days_0">Weight training days:</label> <ul> 
<li><label for="id_weight_training_days_0"><input inline="True" type="checkbox" name="weight_training_days" value="0" id="id_weight_training_days_0" /> Mon</label></li> 
<li><label for="id_weight_training_days_1"><input checked="checked" name="weight_training_days" value="1" inline="True" type="checkbox" id="id_weight_training_days_1" /> Tue</label></li> 
<li><label for="id_weight_training_days_2"><input checked="checked" name="weight_training_days" value="2" inline="True" type="checkbox" id="id_weight_training_days_2" /> Wed</label></li> 
<li><label for="id_weight_training_days_3"><input inline="True" type="checkbox" name="weight_training_days" value="3" id="id_weight_training_days_3" /> Thu</label></li> 
<li><label for="id_weight_training_days_4"><input checked="checked" name="weight_training_days" value="4" inline="True" type="checkbox" id="id_weight_training_days_4" /> Fri</label></li> 
<li><label for="id_weight_training_days_5"><input checked="checked" name="weight_training_days" value="5" inline="True" type="checkbox" id="id_weight_training_days_5" /> Sat</label></li> 
<li><label for="id_weight_training_days_6"><input checked="checked" name="weight_training_days" value="6" inline="True" type="checkbox" id="id_weight_training_days_6" /> Sun</label></li> 
</ul> <span class="helptext">(Required) 3 days must be selected</span></p>