我在检查视图中的某些条件后尝试创建一个动态表单,但不确定如何处理它。如何从我的视图中填充表单 Meta 类中的字段属性?
以下是我的 views.py 和 forms.py 文件。
views.py
如何从我的视图中填充 forms.py 中的字段列表?
from django.shortcuts import render, get_object_or_404
from django.http import HttpResponse
from django import forms
from .models import Master, Label, Assosiative
from .forms import LabelForm, MzasterForm, AssosiativeForm
def master(request,pk):
associate = get_object_or_404(Assosiative, pk=pk)
form = MasterForm(request.POST or None)
if associate.short_text1 == 1:
form.fields['short_text1'] = forms.CharField(label='Short text 1')
if associate.short_text2 == 1:
form.fields['short_text2'] = forms.CharField(label='Short text 2')
if associate.short_text3 == 1:
form.fields['short_text3'] = forms.CharField(label='Short text 3')
if associate.short_text4 == 1:
form.fields['short_text4'] = forms.CharField(label='Short text 4')
if associate.num_field1 == 1:
form.fields['num_field1'] = forms.CharField(label='Number field 1')
if associate.num_field2 == 1:
form.fields['num_field2'] = forms.CharField(label='Number field 2')
if form.is_valid():
try:
short_text1 = form.cleaned_data['short_text1']
short_text2 = form.cleaned_data['short_text2']
short_text3 = form.cleaned_data['short_text3']
short_text4 = form.cleaned_data['short_text4']
num_field1 = form.cleaned_data['num_field1']
num_field2 = form.cleaned_data['num_field2']
form.save()
except Exception, ex:
return HttpResponse("Error %s" %str(ex))
return render(request, 'master.html', {'form':form,})
forms.py
我不确定在这里做什么,以便我可以从我的视图中填充字段
def masterForm(fields_list, *args, **kwargs):
class MasterForm(forms.ModelForm):
class Meta:
model = Master
fields = fields_list
def __init__(self):
super(MasterForm, self).__init__(*args, **kwargs)
return MasterForm()
joke = masterForm(('short_text1',))
与此问题一样,您可以定义创建窗体类的方法。 查看您的视图,您似乎正在基于 associate
逐个创建字段,而不是创建字段列表。因此,我会使用associate
作为您的get_form_class
方法的参数。
def get_form_class(fields_list):
class MasterForm(ModelForm):
class Meta:
model = Master
fields = fields_list
...
return MasterForm
然后,在您的视图中,使用该get_form
动态创建窗体类,然后将其实例化。
def master(request, pk):
associate = get_object_or_404(Assosiative, pk=pk)
fields_list = []
if associate.short_text1 == 1:
fields_list.append('short_text1')
if associate.short_text2 == 1:
fields_list.append('short_text2')
MasterForm = get_form_class(fields_list)
form = MasterForm(request.POST or None)
if form.is_valid():
...
在检查某些条件后动态创建表单
views.py
def master(request, pk):
associate = get_object_or_404(Assosiative, pk=pk)
MasterForm = get_form_class(associate)
form = MasterForm(request.POST or None)
if form.is_valid():
form.save()
messages.add_message(request, messages.INFO, 'Your Form has been posted successfully')
return HttpResponseRedirect('/')
return render(request, 'master.html', locals())
动态地将表单字段添加到字段列表类 Meta 中 forms.py
def get_form_class(associate, *args, **kwargs):
class MasterForm(forms.ModelForm):
def __init__(self, *args, **kwargs):
super(MasterForm,self).__init__(*args, **kwargs)
class Meta:
model = Master
fields = [] #initialize an empty fields list
# Append items to the fields list after checking some condition
if associate.short_text1 == 1:
fields.append('short_text1')
if associate.short_text2 == 1:
fields.append('short_text2')
if associate.short_text3 == 1:
fields.append('short_text3')
if associate.short_text4 == 1:
fields.append('short_text4')
if associate.num_field1 == 1:
fields.append('num_field1')
if associate.num_field2 == 1:
fields.append('num_field2')
return MasterForm