用于ModelFormset的Django删除按钮操作

debugcn 发表于 Dev

莫伊塔巴·尤塞菲（Mojtaba Yousefi）

我有一个modelformset，如下所示：

views.py

def manage_authors(request):
    AuthorFormSet = modelformset_factory(Author, fields=('name', 'title', 'birth_date'))
    if request.method == 'POST':
        if "del_btn" in request.POST:
            query = Author.objects.get(...).delete()
            formset = AuthorFormSet(request.POST, request.FILES)
            if formset.is_valid():
                formset.save()
                formset = AuthorFormSet(queryset=Author.objects.all())
                print "yes"
        else:
            formset = AuthorFormSet(request.POST, request.FILES)
            if formset.is_valid():
                formset.save()
                formset = AuthorFormSet(queryset=Author.objects.all())
    else:
        formset = AuthorFormSet(queryset=Author.objects.all())
    return render(request, "manage_authors.html", {"formset": AuthorFormSet, })

manage_authors.html

<form method="post" action="/manage_authors.html">{% csrf_token %}
{{ formset.management_form }}
{% for form in formset %}
    {{ form.id }}
    <ul>
        {{ form.name }} {{ form.title }} {{ form.birth_date }}
        <input type="submit" name="del_btn" value="Delete"/>
    </ul>
{% endfor %}
<input type='submit' name="edit_btn" value='Edit / Add'/>

我可以定义什么查询，以便“删除”按钮可以工作？

现在，我遇到了必须删除哪一行的问题。

提前致谢

尤甘达·乔杜里（Yugandhar Chaudhari）

首先，我建议在admin.py中注册用户模型：

admin.site.register(Author)

Django将处理其余的工作。

但是，如果要使用此代码来执行此操作，请执行以下操作：

<form method="post" action="/manage_authors.html">{% csrf_token %}
{{ formset.management_form }}
 for form in formset %}
    {{ form.id }}
    <ul>
        {{ form.name }} {{ form.title }} {{ form.birth_date }}
    <input type="submit" name="del_btn{{ form.instance.id }}" value="Delete"/>
</ul>
{% endfor %}
<input type='submit' name="edit_btn" value='Edit / Add'/>

这样，对象的主键将与删除按钮的名称有关。

现在，在views.py中：

import re, urllib

def manage_authors(request):
    AuthorFormSet = modelformset_factory(Author, fields=('name', 'title', 'birth_date'))
    if request.method == 'POST':
        enurl=urllib.urlencode(request.POST)  # To convert POST into a string
        matchobj=re.search(r'del_btn\d', enurl)  # To match for e.g. del_btn1
        btnname=matchobj.group()  # Contains matched button name
        pri_key=btname[-1]  # slice the number of btn to identify primarykey 
        if matchobj:
            query = Author.objects.get(pk=pri_key).delete()
            formset = AuthorFormSet(request.POST, request.FILES)
            if formset.is_valid():
                formset.save()
                formset = AuthorFormSet(queryset=Author.objects.all())
                print "yes"
        else:
            formset = AuthorFormSet(request.POST, request.FILES)
            if formset.is_valid():
                formset.save()
                formset = AuthorFormSet(queryset=Author.objects.all())
    else:
        formset = AuthorFormSet(queryset=Author.objects.all())

    return render(request, "manage_authors.html", {"formset": AuthorFormSet, })

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