Django【进阶】modelform

modelform：models+form

建议尽量用Djangoform，更灵活，但也有人用modelform，写起来很简单

缺点，在models里面，表模型必须有__str__()方法

可添加钩子，用法一样

实例：

注释部分根据需求选择添加，其他为必须有的。

class UserModelForm(ModelForm):

    class Meta:
        model = models.UserInfo
        fields = "__all__"
        # fields = ['username','nickname',]
        # exclude = ['username',]
        # error_messages = {
        #     "username": {'required':'用户名不能为空'}
        # }
        # widgets = {
        #     "username":wid.Textarea(attrs={'class':'c1'})
        # }
        # labels = {
        #     'username':'用户名'
        # }
        # help_texts = {
        #     'username': '别瞎写，瞎写打你哦'
        # }
        #
        # field_classes = {
        #     'username': fld.EmailField
        # }

    # 钩子
    # def clean_email(self):
    #     pass
    #
    # def clean_nickname(self):
    #     pass
    #
    # def clean(self):
    #     pass

增加和修改，删除简单不示例。

def user_add(request):
    # 现在的你# 创建Form类：
    if request.method == 'GET':
        model_form = UserModelForm()
        return render(request,'rbac/user_add.html',{'model_form':model_form})
    else:
        model_form = UserModelForm(request.POST)
        if model_form.is_valid():
            model_form.save()
            return redirect('/rbac/users.html')

        return render(request, 'rbac/user_add.html', {'model_form': model_form})


def user_edit(request,pk):
    obj = models.UserInfo.objects.filter(pk=pk).first()

    if not obj:
        return redirect('/rbac/users.html')
    if request.method == 'GET':
        model_form = UserModelForm(instance=obj)
        return render(request,'rbac/user_edit.html',{'model_form':model_form})
    else:
        model_form = UserModelForm(request.POST,instance=obj)
        if model_form.is_valid():
            model_form.save()
            return redirect('/rbac/users.html')
        return render(request, 'rbac/user_edit.html', {'model_form': model_form})

template

# 表格：
<body>
    <a href="/rbac/user/add.html">添加</a>
    <table border="1">
        {% for row in user_list %}
            <tr>
                <td>{{ row.pk }}</td>
                <td>{{ row.nickname }}</td>
                <td>{{ row.username }}</td>
                <td>
                    <a href="/rbac/user/edit/{{ row.pk }}.html">编辑</a>
                </td>
            </tr>
        {% endfor %}
    </table>
</body>

# 添加：
<body>
    <h1>添加用户</h1>
    <form method="POST" novalidate>
        {% csrf_token %}
        {{ model_form.as_p }}
        <input type="submit" value="提交" />
    </form>
</body>

# 修改：
<body>
    <h1>编辑用户</h1>
    <form method="POST" novalidate>
        {% csrf_token %}
        {{ model_form.as_p }}
        <input type="submit" value="提交" />
    </form>
</body>