如何从外键模型中填入Django中的下拉列表 [英] how to populate dropdown list in Django from a foreignkey model
问题描述
我有两个模型。
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)
现在我必须渲染模板并保存文章模型的表单。我的文章模型中有一个foreignKey字段,因为我无法保存我的文章。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。
Now I have to render a template and save the form for Article model. I have a foreignKey field in my Article Model and because of that I'm not able to save my article form. I want to select a category from dropdown list and save it in my Article model.
我应该如何为此模板进行代码编写?
How should I code my template for this ?
我的views.py函数是:
My views.py function for this is:
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)
我的模板create_article.html目前看起来像这样:
My template create_article.html currently looks like this:
<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>
推荐答案
您不需要手动执行。如果您的 ArticleForm
是 ModelForm
并且不排除类别
然后你可以写 {{form.category}}
并自动获取由django创建的下拉列表。它使用 ModelChoiceField
在下面。
You don't need to do this manually. 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. It uses ModelChoiceField
underneath the hood.
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