Pass values from django views to django forms-CodePudding

I am trying to pass a value from views.py to forms.py in django

views.py:

def pods(request):
    clusterName = request.GET.get('data') ----> this is the value I want to pass to forms
    return render(request,'pods.html',{"nodeForm":forms.getPodsOnNodes()})

forms.py:

class getPodsOnNodes(forms.Form):   
    nodeName = forms.ChoiceField(label='Node Name',choices=functions.choiceMaker(functions.nodesList(**this is where I want to use clusterName from views**)))

Would you please let me know how I can do this?

CodePudding user response：

Considering to get the data from post request passing it to html

form = getPodsOnNodes(request.POST)
if form.is_valid():
    clusterName = request.POST["data"]
    return render(request, 'pods.html', context={'nodeForm': form, 'variable_name': clusterName})

CodePudding user response：

You can pass variables to your form from the view by calling the form with kwargs :

def pods(request):
    clusterName = request.GET.get('data') ----> this is the value I want to pass to forms
    return render(request,'pods.html',{"nodeForm":forms.getPodsOnNodes(clusterName)})

And in your form, you need to retrieve the value of your kwarg in your __init__ method (before the inherited one or else you'll get an error because of an undefined kwarg). However you'll then need to define your field inside of the __init__ method as else your nodeName variable won't be defined.

So your form class will become like that:

class getPodsOnNodes(forms.Form):

    def __init__(self, *args, **kwargs):
        nodeName = kwargs.pop('nodeName')
        super().__init__(*args, **kwargs)

        self.fields['nodeName'] = forms.ChoiceField(label='Node Name',choices=functions.choiceMaker(functions.nodesList(nodeName)))