Django表单错误：“在RadioSelect（）上选择一个有效的选项”（）

Question

试图弄清楚这里出了什么问题。我有一个ModelForm，我需要在三种颜色之间进行无线电选择。我得到以下错误：

“选择一个有效的选择，这是不是可用选项之一”

models.py：

COLORS = (
    ('1', 'Röd'), 
    ('2', 'Gul'), 
    ('3', 'Blå'),) 

class Poster(models.Model): 
    title = models.CharField(max_length=100) 
    colors = models.IntegerField(choices=COLORS, default=2) 

forms.py：

class PosterForm(forms.ModelForm): 
    def __init__(self, *args, **kwargs): 
     super(PosterForm, self).__init__(*args, **kwargs) 

    class Meta: 
     model = Poster 

     fields = ('title', 'colors') 

     labels = { 
       "title": "Rubrik", 
       "colors": "Färg", 
     } 

     widgets = { 
      'colors': forms.RadioSelect(attrs={'choices': "[(1, 'Röd'), (2, 'Gul'),(3, 'Blå')]"}), 
    } 

template.html：

<div id="id_colors"> 
    <div class="radio"><label for="id_colors_0"><input class="" id="id_colors_0" name="colors" title="" type="radio" value="1" required /> Röd</label></div> 
    <div class="radio"><label for="id_colors_1"><input checked="checked" class="" id="id_colors_1" name="colors" title="" type="radio" value="2" required /> Gul</label></div> 
    <div class="radio"><label for="id_colors_2"><input class="" id="id_colors_2" name="colors" title="" type="radio" value="3" required /> Blå</label></div> 
</div> 


{% if form.colors.errors %} 
    <div class="alert alert-danger"> 
     <strong>{{ form.colors.errors|escape }}</strong> 
    </div> 
{% endif %} 

欢迎任何帮助！

Answer 1

结果IntegerField并不那么热衷于String中的数字值。改变这种方式来使用字母和CharField做了诀窍。

models.py：

COLORS = (
    ('r', 'Röd'), 
    ('y', 'Gul'), 
    ('b', 'Blå'),) 

class Poster(models.Model): 
    title = models.CharField(max_length=100) 
    colors = models.CharField(choices=COLORS, max_length=1) 

forms.py：

class PosterForm(forms.ModelForm): 
    def __init__(self, *args, **kwargs): 
     super(PosterForm, self).__init__(*args, **kwargs) 

    class Meta: 
     model = Poster 

     fields = ('title', 'colors') 

     labels = { 
       "title": "Rubrik", 
       "colors": "Färg", 
     } 

     widgets = { 
      *'colors': forms.RadioSelect(),* 
    } 

template.html：

<div id="id_colors"> 
    <div class="radio"><label for="id_colors_0"><input class="" id="id_colors_0" name="colors" title="" type="radio" value="r" required /> Röd</label></div> 
    <div class="radio"><label for="id_colors_1"><input checked="checked" class="" id="id_colors_1" name="colors" title="" type="radio" value="y" required /> Gul</label></div> 
    <div class="radio"><label for="id_colors_2"><input class="" id="id_colors_2" name="colors" title="" type="radio" value="b" required /> Blå</label></div> 
</div> 


{% if form.colors.errors %} 
    <div class="alert alert-danger"> 
     <strong>{{ form.colors.errors|escape }}</strong> 
    </div> 
{% endif %} 

感谢郑此帖这让我： http://cheng.logdown.com/posts/2015/05/25/django-create-a-radio-input-using-bootstrap3s-inline-style

Answer 2

您需要使用元组进行选择！你很接近，但不是很好。这是它应该看起来如何：

COLORS = [ 
    ('1', 'Röd'), 
    ('2', 'Gul'), 
    ('3', 'Blå') 
] 

看看是否有用。如果有的话，一定要把答案标出来！