formset中，有顯示信息和填報信息的內容

類似於這個頁面

 在考覈系統中，我是用的 tamplate tag，關聯讀取顯示的信息

                            {% if field.name == "beikao_user" %}
                                {{ field }}
                                {{ userdict|lookup:form.beikao_user.value }}

 

下面這個例子，是混合了 listview (object_list) 和formset ，通過tag 把2個對象做成tube，挺有趣,使用了第三方lib

pip install Django-Boost

也可以不用 django-boost ，因爲這個例子只用了 templatetag  zip ，可以學一學這個lib的代碼

 

@register.filter(name="zip")
def _zip(arg1, arg2):
    warn("`zip filter` is deprecated. Use `zip tag` instead.")
    return zip(arg1, arg2)

 

 

 

class TestData(models.Model):
    number = models.PositiveIntegerField()
    name = models.CharField(max_length=200)
    price = models.PositiveIntegerField()
    quantity = models.PositiveIntegerField(blank=True, null=True)
    def __str__(self):
        return self.name
    class Meta:
        verbose_name_plural = "測試數據"

 

 

{% extends 'app1/base.html' %}
{% load boost %}
{% block title %}index{% endblock %}

{% block content %}
<div class="container">
    <h1>index page</h1>
    <br>
    <br>
    {{error_list.0}}

    <form class="form" action="" method="post" enctype="multipart/form-data">
        {% csrf_token %}
        {{ formset.management_form }}

        <div class="bg-light">
            <table class="table table-bordered ">
                <thead>
                    <tr class="table-light">
                        <th scope="col">商品番號</th>
                        <th scope="col">商品名</th>
                        <th scope="col">価格</th>
                        <th scope="col">數</th>
                    </tr>
                </thead>
                <tbody>
                    {% for item, form in object_list|zip:formset %}
                        <tr class="bg-light">
                            <td>
                                {{ item.number }}
                            </td>
                            <td>
                                {{ item.name }}
                            </td>
                            <td>
                                {{ item.price }}
                            </td>
                            <td>
                                {{ form.non_field_errors }}
                                <div class="form-group">
                                    <label for="{{ form.quantity.id_for_label }}">{{ form.quantity.label_tag }}</label>
                                {{ form.quantity }}
                                {{ form.quantity.errors }}

                                {% for field in form.hidden_fields %}
                                    {{ field }}
                                {% endfor %}
                                </div>
                            </td>
                        </tr>
                    {% endfor %}
                    {% for field in form.hidden_fields %}
                        {{ field }}
                    {% endfor %}
                </tbody>
            </table>
        </div>
        <div class="text-right">
            <button type="submit" class="btn btn-primary">送信</button>
        </div>

    </form>
</div>
{% endblock %}

 

 

from django.views.generic import TemplateView
from django.http import HttpResponse
from django import forms
from django.shortcuts import render, redirect

from .models import TestData


class IndexView(TemplateView):
    template_name: str = "app1/index.html"
    object_list = TestData.objects.all().order_by("number")
    max_num = object_list.count()

    test_data_formset = forms.modelformset_factory(
        model=TestData,
        fields=["quantity"],
        extra=3,
        max_num=max_num
    )

    def get_context_data(self, **kwargs):
        # get処理だけ書く
        ctx = super().get_context_data(**kwargs)
        # 新規作成formを作る場合は
        # formset = self.test_data_formset(queryset=TestData.objects.none())
        ctx["formset"] = self.test_data_formset()
        ctx["object_list"] = self.object_list
        return ctx

    def post(self, request, *args, **kwargs) -> HttpResponse:
        formset = self.test_data_formset(request.POST)
        if formset.is_valid():
            formset.save()
            return redirect("app1:index")
        context = {
            "object_list": self.object_list,
            "formset": formset,
        }
        return render(request, self.template_name, context)