如何在 Django 中通過 modelformset_factory 驗證？
[英]How can I pass modelformset_factory validation in Django?
問題描述
我有 2 兩個具有一對一關系的模型，如下所示。
class Kategori(models.Model):
urun = models.CharField(db_column='Urun', max_length=255, blank=True, null=True) # Field name made lowercase.
kategori = models.CharField(db_column='Kategori', max_length=255, blank=True, null=True) # Field name made lowercase.
ust_kategori = models.CharField(db_column='Ust_Kategori', max_length=255, blank=True, null=True) # Field name made lowercase.
urun_adi = models.CharField(db_column='URUN_ADI', max_length=255, blank=True, null=True) # Field name made lowercase.
ur_id = models.CharField(db_column='UR_ID', max_length=255, blank=True, null=True) # Field name made lowercase.
marka = models.CharField(db_column='MARKA', max_length=255, blank=True, null=True) # Field name made lowercase.
cesidi = models.CharField(db_column='CESIDI', max_length=255, blank=True, null=True) # Field name made lowercase.
miktar = models.FloatField(db_column='MIKTAR', blank=True, null=True) # Field name made lowercase.
birim = models.CharField(db_column='BIRIM', max_length=255, blank=True, null=True) # Field name made lowercase.
adet = models.FloatField(db_column='ADET', blank=True, null=True) # Field name made lowercase.
class categoryprob(models.Model):
urun = models.OneToOneField(Kategori,on_delete=models.CASCADE,related_name="prob")
kategori = models.CharField(max_length=255, blank=True, null=True) # Field name made lowercase.
ust_kategori = models.CharField(max_length=255, blank=True, null=True) # Field name made lowercase.
urun_adi = models.CharField(max_length=255, blank=True, null=True) # Field name made lowercase.
marka = models.CharField(max_length=255, blank=True, null=True) # Field name made lowercase.
cesidi = models.CharField(max_length=255, blank=True, null=True) # Field name made lowercase.
miktar = models.FloatField(blank=True, null=True) # Field name made lowercase.
birim = models.CharField(max_length=255, blank=True, null=True) # Field name made lowercase.
adet = models.FloatField(blank=True, null=True) # Field name made lowercase.
我正在嘗試更新Kategori model 對象取決於categoryprob輸入。 我准備了一個表格來獲取Kategori對象，具體取決於它們在categoryprob中的概率，如下所示。
from django import forms
from mailservice.models import categoryprob,Kategori
PASS_PROB = 0.8
class predictionForm(forms.ModelForm):
class Meta:
model = Kategori
fields = ["urun","kategori","ust_kategori","urun_adi","marka","cesidi","miktar","birim","adet"]
widgets = {
'kategori': forms.Select(choices=set(Kategori.objects.all().values_list('kategori','kategori'))),
'ust_kategori': forms.Select(choices=set(Kategori.objects.all().values_list('ust_kategori','ust_kategori'))),
'marka': forms.Select(choices=set(Kategori.objects.all().values_list('marka','marka'))),
'cesidi': forms.Select(choices=set(Kategori.objects.all().values_list('cesidi','cesidi'))),
'miktar': forms.Select(choices=set(Kategori.objects.all().values_list('miktar','miktar'))),
'birim': forms.Select(choices=set(Kategori.objects.all().values_list('birim','birim'))),
'adet': forms.Select(choices=set(Kategori.objects.all().values_list('adet','adet'))),
}
labels ={
'urun':""
}
def __init__(self, *args, **kwargs):
super(predictionForm, self).__init__(*args, **kwargs)
instance = getattr(self, 'instance', None)
prob = categoryprob.objects.get(urun=instance)
self.fields['urun'].widget.attrs['readonly'] = True
if float(prob.kategori) > PASS_PROB:
self.fields['kategori'].widget.attrs['disabled'] = True
self.fields['kategori'].widget.attrs['style'] = 'border-color:red'
else:
self.fields['kategori'].widget.attrs['style'] = 'border-color:green'
if float(prob.ust_kategori) > PASS_PROB:
self.fields['ust_kategori'].widget.attrs['disabled'] = True
self.fields['ust_kategori'].widget.attrs['style'] = 'border-color:red'
else:
self.fields['ust_kategori'].widget.attrs['style'] = 'border-color:green'
if float(prob.urun_adi) > PASS_PROB:
self.fields['urun_adi'].widget.attrs['disabled'] = True
self.fields['urun_adi'].widget.attrs['style'] = 'border-color:red'
else:
self.fields['urun_adi'].widget.attrs['style'] = 'border-color:green'
if float(prob.marka) > PASS_PROB:
self.fields['marka'].widget.attrs['disabled'] = True
self.fields['marka'].widget.attrs['style'] = 'border-color:red'
else:
self.fields['marka'].widget.attrs['style'] = 'border-color:green'
if float(prob.cesidi) > PASS_PROB:
self.fields['cesidi'].widget.attrs['disabled'] = True
self.fields['cesidi'].widget.attrs['style'] = 'border-color:red'
else:
self.fields['cesidi'].widget.attrs['style'] = 'border-color:green'
if float(prob.miktar) > PASS_PROB:
self.fields['miktar'].widget.attrs['disabled'] = True
self.fields['miktar'].widget.attrs['style'] = 'border-color:red'
else:
self.fields['miktar'].widget.attrs['style'] = 'border-color:green'
if float(prob.birim) > PASS_PROB:
self.fields['birim'].widget.attrs['disabled'] = True
self.fields['birim'].widget.attrs['style'] = 'border-color:red'
else:
self.fields['birim'].widget.attrs['style'] = 'border-color:green'
if float(prob.adet) > PASS_PROB:
self.fields['adet'].widget.attrs['disabled'] = True
self.fields['adet'].widget.attrs['style'] = 'border-color:red'
else:
self.fields['adet'].widget.attrs['style'] = 'border-color:green'
我使用modelformset_factory將其中的 3 個一起渲染。 當我在模板上進行如下渲染時，一切正常。
<form method="post" enctype="multipart/form-data">
<div class="form-row">
{{ p_form.management_form }}
{% csrf_token %}
{%for form in p_form%}
<div class="form-group col-md-12">
<div class="card">
<div class="card-header">
{{form.urun|as_crispy_field}}
</div>
<div class="card-body">
<div class="row">
<div class ="col-md-3 col ">
{{form.kategori|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.ust_kategori|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.urun_adi|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.marka|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.cesidi|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.miktar|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.birim|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.adet|as_crispy_field}}
</div>
</div>
</div>
</div>
</div>
{% endfor %}
</div>
<button type="submit" class="btn btn-success">Kaydet</button>
</form>
當我使用 post 方法提交時，如下所示：
def editCategories(request):
categories = Kategori.objects.all().order_by('?')[:3]
CategoryFormSet = modelformset_factory(Kategori, form = predictionForm,extra=0)
formset = CategoryFormSet(queryset = categories)
if request.method == "POST":
if formset.is_valid():
formset.save()
return redirect(request.META['HTTP_REFERER'])
content = {
"p_form":formset,
}
return render(request,'edit_categories.html',content)
formset.is_valid 一直返回 false。
我不知道如何一次驗證所有 forms。 你有什么建議嗎？
模板output圖片：
request.POST的output：
<QueryDict: {'form-TOTAL_FORMS': ['3'], 'form-INITIAL_FORMS': ['3'], 'form-MIN_NUM_FORMS': ['0'], 'form-MAX_NUM_FORMS': ['1000'], 'csrfmiddlewaretoken': ['*****'], 'form-0-id': ['125'], 'form-0-urun': ['_MotorinEcoForce'], 'form-0-urun_adi': ['asdasd'], 'form-1-id': ['186'], 'form-1-urun': ['7 stick sakız karpuz aromalı 12 adet'], 'form-1-marka': ['7 days'], 'form-2-id': ['159'], 'form-2-urun': ['7 Days Kruvasan Kayısılı Tekli 72 g'], 'form-2-kategori': ['Sebze']}>
1 個解決方案
解決方案1
1 已采納 2021-06-05 06:57:13
可以說有兩種 forms綁定形式和非綁定形式。 這些有什么區別？ 那么綁定的表單會傳遞一些數據MyForm(request.POST, request.FILES)並且未綁定的表單不會傳遞任何數據MyForm() 。 從邏輯上講，未綁定的表單永遠不會有效，因為它從未被提交過，並且假定它被創建為簡單地顯示/呈現表單。
這種邏輯同樣適用於表單集，因此由於您沒有將任何數據傳遞給表單集，因此它永遠不會有效。 要考慮的另一件事是您尚未呈現表單集的隱藏字段。 表單集創建了某些隱藏字段，以便它可以識別哪個子表單針對哪些對象以及其他一些事情，例如刪除等。如果沒有這些隱藏字段，您的表單集也將無效。
因此你的觀點應該是這樣的：
def editCategories(request):
categories = Kategori.objects.all().order_by('?')[:3]
CategoryFormSet = modelformset_factory(Kategori, form = predictionForm,extra=0)
formset = CategoryFormSet(queryset = categories)
if request.method == "POST":
# Will get inefficient later on when you have many objects in the database, look for a different solution
formset = CategoryFormSet(request.POST, request.FILES) # Make a bound formset in case of a POST request
if formset.is_valid():
formset.save()
return redirect(request.META['HTTP_REFERER'])
content = {
"p_form":formset,
}
return render(request,'edit_categories.html',content)
你的模板應該是這樣的：
<form method="post" enctype="multipart/form-data">
<div class="form-row">
{{ p_form.management_form }}
{% csrf_token %}
{%for form in p_form%}
{# Render hidden fields #}
{% for hidden in form.hidden_fields %}
{{ hidden }}
{% endfor %}
<div class="form-group col-md-12">
<div class="card">
<div class="card-header">
{{form.urun|as_crispy_field}}
</div>
<div class="card-body">
<div class="row">
<div class ="col-md-3 col ">
{{form.kategori|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.ust_kategori|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.urun_adi|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.marka|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.cesidi|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.miktar|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.birim|as_crispy_field}}
</div>
<div class ="col-md-3 col">
{{form.adet|as_crispy_field}}
</div>
</div>
</div>
</div>
</div>
{% endfor %}
</div>
<button type="submit" class="btn btn-success">Kaydet</button>
</form>
此外，您只能通過向其小部件添加禁用屬性來將字段設置為禁用，這意味着它們不會與表單一起發布，但由於該字段本身未被禁用，它會查找它們的數據，沒有找到它並將其設置為None ，而是要禁用該字段本身：
class predictionForm(forms.ModelForm):
...
def __init__(self, *args, **kwargs):
...
# truncated for shortness
# similar needs to be done for other fields too
if float(prob.kategori) > PASS_PROB:
self.fields['kategori'].disabled = True
self.fields['kategori'].widget.attrs['style'] = 'border-color:red'
...
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