Django-行內表單集-如何設定當前用戶-有解無憂

-目標- 我需要在內聯表單集中將當前用戶設定為表單欄位的自動內容。（目前不作業）

版本 Python 3.9.2 - Django 3.2

背景關系： 我創建了一個串列，其中有一些物件（標題）。通過使用外鍵（由 PK-primarykey 呼叫），我可以從串列中創建新標題并訪問其中每一個的詳細資訊頁面（Detailview）。

在此頁面中，我可以看到有關 1 個特定標題的更多資訊。每個標題可以有多行需要鏈接到它的資訊。這些行是使用（最多 4 個不同的）特定行內表單集創建或更新的。

- 問題和錯誤 - 我創建了正確呈現的表單，但我需要為每一行設定一個自動獲取“當前用戶”作為其內容的欄位。 我無法保存和接收“用戶不能為空”。

我無法找到解決方案并嘗試了很多方法，但仍然遇到此錯誤。

非常感謝有關如何解決此問題的任何幫助。提前致謝，

下面是一些代碼：

網址.PY

from django.urls import path, re_path
from fttlapp import views

app_name= 'fttlapps'

urlpatterns = [
path('fttlapphome2/', views.Fttlapphome2View.as_view(), name='fttlapphome2'),
path('fttlogheader/', views.HeadfttlogListView.as_view(), name='headfttlogs'),
path('fttlogheader/add/', views.HeadfttlogCreateView.as_view(), name='headfttlogcreate'),
path('fttlogheader/<int:pk>/', views.HeadfttlogDetailView.as_view(), name='headfttlogdetail'),
path('fttlogheader/<int:pk>/flights/edit/', views.HeadfttlogDeafttlogEditView.as_view(), name='head_flight_edit'),
]

表單.PY

from django import forms
from django.contrib.auth.models import User
from django.db.models.fields import CharField, DateField
from django.forms import ModelForm, widgets
from django.forms.fields import ChoiceField
from django.forms.models import ModelChoiceField
from django.utils import timezone

# Load necessary to manage Form in Form
from django.forms.models import inlineformset_factory

# Load Tables
from fttlapp.models import Headfttlog, Deafttlog, Debfttlog
###############################################################################
# Forms for Headfttlog                                                        #
###############################################################################


class HeadfttlogcreateForm(ModelForm):
    class Meta:
        model = Headfttlog
        exclude = ['hea_creator', 'hea_modifier']

        widgets = {
            'hea_fttldate' : forms.TextInput(attrs={'type': 'date'}),
            'hea_nxtcheckdate' : forms.TextInput(attrs={'type': 'date'}),
            'hea_transfereddate' : forms.TextInput(attrs={'type': 'date'}),
        }
        ## Calendar widget to work both with Create and Update needs to be TextInput with type date
        ## Calendar widget not compatible with localized_fields !


###############################################################################
# Forms for Headfttlog with Deafttlog details view Management                 #
###############################################################################
HeadfttlogDeafttlogFormset = inlineformset_factory(Headfttlog, Deafttlog, 
    fields=('dea_linetype', 'dea_fttlcode', 'dea_airportfrom', 'dea_airportto',
            'dea_instrtimestart', 'dea_instrtimeend', 'dea_instrtimetot',
            'dea_blocktimestart', 'dea_blocktimeend', 'dea_blocktimetot',
            'dea_flighttimestart', 'dea_flighttimeend', 'dea_flighttimetot', 
            'dea_approach', 'dea_landing', 'dea_external', 'dea_fuel', 'dea_oil',
            'dea_lessonnotes', 'dea_preflightsignature', 'dea_invoiceaccount',
            'dea_transfered', 'dea_transfereddate',
            'dea_reccanceled', 'dea_creator', 'dea_modifier'),
    widgets={
            'dea_instrtimestart' : forms.TimeInput(format= '%H:%M', attrs={'type': 'time'}),
            'dea_instrtimeend' : forms.TimeInput(format= '%H:%M', attrs={'type': 'time'}),
            'dea_instrtimetot' : forms.TimeInput(format= '%H:%M', attrs={'type': 'time'}),
            'dea_blocktimestart' : forms.TimeInput(format= '%H:%M', attrs={'type': 'time'}),
            'dea_blocktimeend' : forms.TimeInput(format= '%H:%M', attrs={'type': 'time'}),
            'dea_blocktimetot' : forms.TimeInput(format= '%H:%M', attrs={'type': 'time'}),
            'dea_flighttimestart' : forms.TimeInput(format= '%H:%M', attrs={'type': 'time'}),
            'dea_flighttimeend' : forms.TimeInput(format= '%H:%M', attrs={'type': 'time'}),
            'dea_flighttimetot' : forms.TimeInput(format= '%H:%M', attrs={'type': 'time'}),
            'dea_reccanceled' : forms.HiddenInput,
            'dea_creator' : forms.HiddenInput,
            'dea_modifier' : forms.HiddenInput,
        }, extra=1, max_num=8)

視圖.PY

from django.shortcuts import render
from django.http import HttpResponseRedirect
from django.urls import reverse
# Load necessary view
from django.views.generic import (
    TemplateView, ListView, CreateView, DetailView, FormView)
from django.views.generic.detail import SingleObjectMixin
# Load for security and access management
from django.contrib.auth.decorators import login_required
from django.contrib.auth.mixins import LoginRequiredMixin
from django.contrib.auth.mixins import PermissionRequiredMixin
# Load functions and tools for search bar management
from fttlapp.filters import HeadfttlogFilter
import operator
from functools import partial, reduce
from django.db.models import Q
# Load functions for messages management
from django.contrib import messages
# Load Tables & Forms
from fttlapp.models import Headfttlog
from fttlapp.forms import HeadfttlogcreateForm
from fttlapp.forms import HeadfttlogDeafttlogFormset


###############################################################################
# FTTL home page management                                                   #
###############################################################################


@login_required
def fttlapphome(request):
    context = {}
    return render(request, 'fttlapp/fttlapphome.html', context)


###############################################################################
# FTTL home page 2 management                                                 #
###############################################################################

class Fttlapphome2View(TemplateView, LoginRequiredMixin):
    template_name = 'fttlapp/fttlapphome2.html'

###############################################################################
# Headfttlog - List view Management                                           #
###############################################################################


class HeadfttlogListView(ListView, LoginRequiredMixin, PermissionRequiredMixin):
    permission_required = 'fttlapp.view_headfttlog'

    model = Headfttlog
    template_name = 'fttlapp/headfttlog_list.html'
    paginate_by = 10

    def get_context_data(self, *args, **kwargs):
        context = super().get_context_data(*args, **kwargs)
        context['myFilter'] = HeadfttlogFilter(
            self.request.GET, queryset=self.get_queryset())
        return context

    # Following redefintion necessary to obtain correct pagination after Filter plugin
    def get_queryset(self):
        queryset = super().get_queryset()
        return HeadfttlogFilter(self.request.GET, queryset=queryset).qs


###############################################################################
# Headfttlog - Create view Management Headfttlog                              #
###############################################################################


class HeadfttlogCreateView(LoginRequiredMixin, PermissionRequiredMixin, CreateView):
    permission_required = 'fttlapp.add_headfttlog'

    model = Headfttlog
    template_name = 'fttlapp/headfttlogcreate_form.html'
    form_class = HeadfttlogcreateForm

    def form_valid(self, form):
        form.instance.hea_creator = self.request.user
        form.instance.hea_modifier = self.request.user
        messages.add_message(
            self.request,
            messages.SUCCESS,
            'The LOG has been created'
        )
        return super().form_valid(form)


###############################################################################
# Headfttlog - Detail view Management Headfttlog                              #
###############################################################################

class HeadfttlogDetailView(LoginRequiredMixin, PermissionRequiredMixin, DetailView):
    permission_required = 'fttlapp.view_headfttlog'

    model = Headfttlog
    template_name = 'fttlapp/headfttlogdetail.html'


###############################################################################
# Headfttlog with Deafttlog details view Management                             #
###############################################################################

class HeadfttlogDeafttlogEditView(LoginRequiredMixin, PermissionRequiredMixin, SingleObjectMixin, FormView):
    permission_required = ('fttlapp.add_headfttlog','fttlapp.change_headfttlog',
                             'fttlapp.add_deafttlog', 'fttlapp.change_deafttlog')

    model = Headfttlog
    template_name = 'fttlapp/head_flight_edit.html'

    ### 1. Identification of the single Headfttlog we will work with
    def get(self, request, *args, **kwargs):
        self.object = self.get_object(queryset=Headfttlog.objects.all())
        return super().get(request, *args, **kwargs)
    
    def post(self, request, *args, **kwargs):
        self.object = self.get_object(queryset=Headfttlog.objects.all())
        return super().post(request, *args, **kwargs)

    ### 2. FormSet creation - instance is the link to the above data. 
    def get_form(self, form_class=None):
        return HeadfttlogDeafttlogFormset(**self.get_form_kwargs(), instance=self.object)

    def formset_valid(self, form):
        form.dea_creator = self.request.user
        form.dea_modifier = self.request.user

        form.save()

        messages.add_message(
            self.request,
            messages.SUCCESS,
            'Changes were saved.'
        )

        return HttpResponseRedirect(self.get_success_url())
        
    def get_success_url(self):
        return reverse('fttlapps:headfttlogdetail', kwargs={'pk': self.object.pk})



###############################################################################
# End of view Management                                                      #
###############################################################################

HTML


{% extends 'base/dibase3.html' %}
{% load static %}

{% load crispy_forms_tags %}
{% crispy formset %}

{% block title %}Editing Flights and Instructions for {{ headfttlog.fttlcode }}{% endblock %}

{% block content %}


<style>

    .box{
        max-width: fit-content;
        margin: auto;

    }
</style>
 
</div>

<nav class="navbar navbar-expand-lg navbar-light bg-light">
    <div class="container-fluid">
      
        <div class="text-start">
          <a class="btn btn-outline-info " href="{% url 'fttlapps:headfttlogdetail' pk=headfttlog.pk %}">Back to Detail</a>
          
        </div>

     </div>
    </nav>
<hr>

<div class="container"> 

  <form action="" method="post" enctype="multipart/form-data">

    {% for hidden_field in form.hidden_fields %}
      {{ hidden_field.errors }}
      {{ hidden_field }}
    {% endfor %}

    {% csrf_token %}

    {{ form.management_form }}
    {{ form.non_form_errors }}

    <h3>Update Collection</h3>
    {% for deafttlog_form in form.forms %}
      <hr>
      <h5>
        {% if deafttlog_form.instance.id %}
          Deafttlog: {{ deafttlog_form.instance.dea_linetype }}
        {% else %}
          {% if form.forms|length > 1 %}
            Add another deafttlog
          {% else %}
            Add a deafttlog
          {% endif %}
        {% endif %}
      </h5>
      {% for hidden_field in deafttlog_form.hidden_fields %}
        {{ hidden_field.errors }}
      {% endfor %}
      <table>
        {{ deafttlog_form }}
      </table>
    {% endfor %}
    <hr>
    <p>
      <button type="submit" value="Update Flight" class="btn btn-primary w-100 mb-3">Update Flight</button>
      <a href="{{ author.get_absolute_url  }}" role="button" class="btn btn-secondary w-100">Return</a>
    </p>
  </form>

{% endblock content %}

uj5u.com熱心網友回復：

對于審計欄位creator和modifier模型欄位，我通常會blank=True, null=True在模型欄位定義中設定。只要這樣做，您的代碼就會起作用，因為您已經在處理視圖中的dea_creator和設定dea_modifier。

如果您想像現在一樣在資料庫中強制執行此操作，則必須將傳遞request.user給您dea_creator的表單集，并在初始化表單時將其設定為該欄位的初始值。

編輯：

我上面提到的另一種方法是，在您的HeadfttlogDeafttlogFormset, 而不是設定fieldsand widgets，創建一個實際使用的表單，例如DeafttlogForm，然后設定fieldsand widgets。然后在您的表單集中，您設定form=DeafttlogForm.

在新創建的中DeafttlogForm，初始化dea_creator欄位：

def __init__(self, *args, **kwargs):
    user = kwargs.pop('user', None)
    super(DeafttlogForm, self).__init__(*args, **kwargs)
    instance = getattr(self, 'instance', None)
    if not instance.id and user:
        self.initial['dea_creator'] = user

然后在中HeadfttlogDeafttlogEditView，添加一個get_form_kwargs方法：

def get_form_kwargs(self):
    kwargs = super(HeadfttlogDeafttlogEditView, self).get_form_kwargs()
    kwargs['user'] = self.request.user
    return kwargs

轉載請註明出處，本文鏈接：https://www.uj5u.com/gongcheng/367298.html

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