[英]how to populate dropdown list in Django from a foreignkey model
I have two models. 我有两个型号。
class ArticleCategory(models.Model):
category = models.CharField(max_length=255,blank=False)
class Article(models.Model):
title = models.CharField(max_length=255,blank=False)
body = models.TextField()
pub_date = models.DateTimeField(auto_now_add=True)
category = models.ForeignKey(ArticleCategory,default=1)
Now I have to render a template and save the form for Article model. 现在我必须渲染一个模板并保存文章模型的表单。 I have a foreignKey field in my Article Model and because of that I'm not able to save my article form.
我的文章模型中有一个foreignKey字段,因此我无法保存我的文章形式。 I want to select a category from dropdown list and save it in my Article model.
我想从下拉列表中选择一个类别并将其保存在我的文章模型中。
How should I code my template for this ? 我应该如何为此编码模板?
My views.py function for this is: 我的views.py函数是:
def create(request):
if request.POST:
form = ArticleForm(request.POST, request.FILES)
if form.is_valid():
form.save()
return HttpResponseRedirect('/articles/all/')
else:
form = ArticleForm()
args={}
args.update(csrf(request))
args['categories'] = ArticleCategory.objects.all()
args['form'] = form
return render_to_response('create_article.html', args)
My template create_article.html currently looks like this: 我的模板create_article.html目前看起来像这样:
<form role="form" action="/articles/create/" method="POST" enctype="multipart/form-data">{% csrf_token %}
<div class="row">
<div class="form-group col-lg-3">
<label></label>
<p>{{form.title}}</p>
</div>
<div class="form-group col-lg-3">
<label>Category</label>
<p>
<select id="id_category">
{% for category in categories %}
<option value="{{ category }}">{{ category.category }}</option>
{% endfor %}
</select>
</p>
</div>
<div class="clearfix"></div>
<div class="form-group col-lg-12">
<label>Body</label>
{{form.body}}
</div>
<div class="form-group col-lg-12">
<button type="submit" class="btn btn-default">Save Article</button>
</div>
</div>
</form>
You don't need to do this manually. 您无需手动执行此操作。 If your
ArticleForm
is ModelForm
and doesn't exclude category
field then you can just write {{ form.category }}
and get dropdown created by django automatically. 如果您
ArticleForm
是ModelForm
不排除category
字段,那么你可以只写{{ form.category }}
并获得通过下拉Django的自动创建。 It uses ModelChoiceField
underneath the hood. 它使用了引擎盖下的
ModelChoiceField
。
replace 更换
<select id="id_category">
{% for category in categories %}
<option value="{{ category }}">{{ category.category }}</option>
{% endfor %}
</select>
with 同
{{ form.category }}
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