change a form value before validation in Django form

Question

I have a django form and on my view function I do this :

search_packages_form = SearchPackagesForm( data = request.POST )

I would like to overw

Answer 1

My solution is build on an earlier proposal. It is a working solution, which can be used in several cases.

@Milad Khodabandehloo had a tricky solution to solve the problem.

changed_data = dict(request.POST)
changed_data['price'] = NEW_PRICE
search_packages_form = SearchPackagesForm(data = changed_data)

as @The EasyLearn Academy commented: it does not allow you to access actual data submitted in form.

This is because the request.POST is immutable.

But there is a solution to the problem - just have to be more tricky.

This solution is only good if a reference to the object is enough for the certain cause. It leaves the object itself the same.

# write object to variable (data)
data = request.POST

# set to mutable
data._mutable = True

# modify the values in data 
data[modified_field] = new_value

# set mutable flag back (optional)
data._mutable = False

Hope it's useful!