[英]how to add a different model form to modelformset_factory
關於這些模型:
class Projects(models.Model):
projectDescription = models.CharField(max_length=50,blank=True,null = True,)
status = models.IntegerField(choices = Status_CHOICES, default = 4)
projectOwner = models.ForeignKey(staff, on_delete=models.CASCADE, blank=True,null = True,)
class Updates(models.Model):
project = models.ForeignKey(Projects, on_delete=models.CASCADE)
update = models.CharField(max_length=50,blank=True,null = True,)
updateDate = models.DateTimeField(default = timezone.now, editable = False)
addedBy = models.CharField(max_length=35,blank=True,)
我想為所有當前項目創建一個顯示 forms 的視圖。 這很容易使用modelformset_factory
。 但是,我怎樣才能向這些項目表單實例中的每一個添加一個額外的表單,以便可以對項目(外鍵)進行更新? 理想情況下,用戶對各種項目進行更改,為一個或多個項目添加更新,然后提交表單以保存所有更改。 我在下面的內容似乎非常接近,但它正在保存每個項目的更新,其中包含我在最后一個表單中輸入的任何內容的值。 這似乎是因為形式不是唯一的。 我走上了使用前綴的道路,這似乎也沒有讓我到任何地方。 幫助!
更新表格
class updateForm(ModelForm):
def __init__(self, *args, **kwargs):
super(updateForm, self).__init__(*args, **kwargs)
class Meta:
model = Updates
fields = ('update',)
看法:
def MDSprojects(request):
projects = Projects.objects.filter(dept = 'Assistive Technology')
projectFormset = modelformset_factory(Projects, form=EditProjectForm, extra = 0)
if request.method == 'POST':
formsetA = projectFormset(request.POST,request.FILES)
if formsetA.is_valid():
for f in formsetA:
formA = f.save(commit = False)
id = formA.id
formA.save()
formsetB = updateForm(request.POST,request.FILES)
if formsetB.is_valid():
formB = formsetB.save(commit = False)
project = Projects.objects.get(id = id)
formB.project = project
formB.save()
else:
print(formsetB.errors)
return redirect('MDS_Projects')
else:
print(formsetA.errors)
else:
formsetA = projectFormset(queryset = projects)
formsetB = updateForm()
return render(request,'MDSprojectsB.html',{'formset':formsetA,'formsetB':formsetB,})
模板:
<form method="POST" enctype= multipart/form-data>
{{ formset.management_form }}
{% csrf_token %}
{%for form in formset%}
{{ form.management_form }}
{% for hidden in form.hidden_fields %}
{{ hidden }}
{% endfor %}
<div class="card border-primary mb-3" style="max-width: 85rem;">
<div class="card-header text-primary">
<strong>{{form.instance.projectDescription}}</strong>
</div>
<div class="card-body text-primary"> Project Name: {{form.projectDescription}}</div>
<div class="card-body text-primary"> Status: {{form.status}}</div>
<div class="card-body text-primary"> Status: {{form.projectOwner}}</div>
<div class="card-body text-primary"> Status: {{form.priority}}</div>
<div>
{{ formsetB.management_form }}
{% for hidden in formsetB.hidden_fields %}
{{ hidden }}
{% endfor %}
{{formsetB}}
</div>
</div>
{% endfor %}
<button class="btn btn-success btn" type="submit">Save Changes</button>
</form>
編輯:
也許解釋我的問題的另一種方式是:
如果我有與上述相同的模型:
class Projects(models.Model):
projectDescription = models.CharField(max_length=50,blank=True,null = True,)
status = models.IntegerField(choices = Status_CHOICES, default = 4)
projectOwner = models.ForeignKey(staff, on_delete=models.CASCADE, blank=True,null = True,)
class Updates(models.Model):
project = models.ForeignKey(Projects, on_delete=models.CASCADE)
update = models.CharField(max_length=50,blank=True,null = True,)
updateDate = models.DateTimeField(default = timezone.now, editable = False)
addedBy = models.CharField(max_length=35,blank=True,)
我想要一個視圖,將所有當前項目呈現為單獨的 forms,以便用戶可以在一個視圖中對項目 model 進行更改。 此外,我希望用戶也能夠為每個項目添加更新。
例如,如果我有 3 個項目,我希望在頁面上看到 3 個 forms。 每個表單都將包含修改此項目的字段(因此這些表單字段將預先填充當前值)。 最后(我堅持的部分)將是一個額外的空白字段,用於向項目添加更新。
你所做的幾乎是正確的。 您已經啟動了一個 UpdateForm,但您將它視為一個表單集。 但是它是一個 Form 實例。 如果您按以下方式更改代碼,您可能會實現您的目標。
模型.py
class Project(models.Model):
description = models.CharField(max_length=50, blank=True, null=True)
status = models.IntegerField(choices=STATUS_CHOICES, default=4)
owner = models.ForeignKey(staff, on_delete=models.CASCADE, blank=True, null=True)
...
class Update(models.Model):
project = models.ForeignKey(Project, on_delete=models.CASCADE)
notes = models.CharField(max_length=50, blank=True, null=True)
update_date = models.DateTimeField(default=timezone.now, editable=False)
added_by = models.CharField(max_length=35, blank=True)
forms.py
class CreateUpdateForm(ModelForm):
class Meta:
model = Update
fields = ('notes')
class EditProjectForm(ModelForm)
class Meta:
model = Project
fields = ('__all__')
視圖.py
def mds_projects(request):
project_formset = modelformset_factory(Project, form=EditProjectForm, extra=0)
if request.method == 'POST':
formset = project_formset(request.POST,request.FILES)
if formset.is_valid():
for f in formset:
project = f.save(commit = False)
update_form = CreateUpdateForm(request.POST,request.FILES)
if update_form.is_valid():
update = update_form.save(commit = False)
update.project = project
project.save()
update.save()
else:
print(update_form.errors)
return redirect('MDS_Projects')
else:
print(formset.errors)
else:
projects = Project.objects.filter(dept='Assistive Technology')
formset = project_formset(queryset=projects)
update_form = updateForm()
return render(request,'MDSprojectsB.html',{'formset':formset, 'update_form':update_form})
MDS項目B.html
<form method="POST" enctype= multipart/form-data>
{{ formset.management_form }}
{% csrf_token %}
{%for form in formset%}
{{ form.management_form }}
{% for hidden in form.hidden_fields %}
{{ hidden }}
{% endfor %}
<div class="card border-primary mb-3" style="max-width: 85rem;">
<div class="card-header text-primary">
<strong>{{form.instance.description}}</strong>
</div>
<div class="card-body text-primary"> Project Name: {{form.description}}</div>
<div class="card-body text-primary"> Status: {{form.status}}</div>
<div class="card-body text-primary"> Owner: {{form.owner}}</div>
<div class="card-body text-primary"> Priority: {{form.priority}}</div>
<div>
{{ update_form }}
</div>
</div>
{% endfor %}
<button class="btn btn-success btn" type="submit">Save Changes</button>
</form>
您也可以對兩種模型使用一種形式。 由於您只需要Update
model 的更新說明,因此您可以添加額外的表單字段來更新項目表單,因此您不需要額外的更新表單。
forms.py
class EditProjectForm(ModelForm)
update_notes = forms.CharField(max_length=50, help_text='50 characters max.')
class Meta:
model = Project
fields = ('__all__')
視圖.py
def mds_projects(request):
project_formset = modelformset_factory(Project, form=EditProjectForm, extra=0)
if request.method == 'POST':
formset = project_formset(request.POST,request.FILES)
if formset.is_valid():
for f in formset:
project = f.save(commit = False)
update = Update.objects.create(notes=f.cleaned_data['update_notes'], project=project)
project.save()
return redirect('MDS_Projects')
else:
print(formset.errors)
else:
projects = Project.objects.filter(dept='Assistive Technology')
formset = project_formset(queryset=projects)
return render(request,'MDSprojectsB.html',{'formset':formset})
MDS項目B.html
<form method="POST" enctype= multipart/form-data>
{{ formset.management_form }}
{% csrf_token %}
{%for form in formset%}
{{ form.management_form }}
{% for hidden in form.hidden_fields %}
{{ hidden }}
{% endfor %}
<div class="card border-primary mb-3" style="max-width: 85rem;">
<div class="card-header text-primary">
<strong>{{form.instance.description}}</strong>
</div>
<div class="card-body text-primary"> Project Name: {{form.description}}</div>
<div class="card-body text-primary"> Status: {{form.status}}</div>
<div class="card-body text-primary"> Owner: {{form.owner}}</div>
<div class="card-body text-primary"> Priority: {{form.priority}}</div>
<div class="card-body text-primary"> Update: {{form.update_notes}}</div>
</div>
{% endfor %}
<button class="btn btn-success btn" type="submit">Save Changes</button>
</form>
PS您提供的代碼有些違反 python 和 django 命名約定。 請盡量遵守這些約定。 我已經在我的代碼中修復了其中的一些問題。 例如,你不應該為你的模型命名復數,你應該為函數和變量使用駝峰命名法。
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