BaseModelFormSet > _construct_form

[nikolaysm]

Hello,

In function _construct_form variable "pk_key" is generated as:

 pk_key = "%s-%s" % (self.add_prefix (i), self.model._meta.pk.name) "

So pk_key is not flexible. Because if I overwrite function "add_prefix" from class "forms.ModelForm", I get error "MultiValueDictKeyError".

My add_prefix function:

def add_prefix(self, field_name):

      return '%s_%s' % (self.prefix, field_name) if self.prefix else field_name

I see a possibility to solve that for now. Overwrite function _construct_form.

Other options?

[Matthew Pava]

Why are overwriting add_prefix? Why are you overwriting _construct_form?

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[Kevin Jay]

ke...@kjay.net

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[Nikolay Smirnov]

I override add_prefix because on client side I use angularjs. In some cases it is impossible or not easy to use hyphens in the names.

I do not overwrite _construct_form! That was just a possibility to solve that. But at the moment, I see no other options for solving that.

I find it personally that generating variable pk_key within the _construct_form is a bad practice. And becomes not compatible with generating form field ID's and -field names.

On Tuesday, 2 April 2019 23:15:15 UTC+2, Matthew Pava wrote:

Why are overwriting add_prefix? Why are you overwriting _construct_form?

 

From: django...@googlegroups.com [mailto:django...@googlegroups.com] On Behalf Of nikolaysm
Sent: Tuesday, April 2, 2019 9:37 AM
To: Django users
Subject: BaseModelFormSet > _construct_form

 

Hello,

 

In function _construct_form variable "pk_key" is generated as:

 pk_key = "%s-%s" % (self.add_prefix (i), self.model._meta.pk.name) "

 

So pk_key is not flexible. Because if I overwrite function "add_prefix" from class "forms.ModelForm", I get error "MultiValueDictKeyError".

 

My add_prefix function:

def add_prefix(self, field_name):

      return '%s_%s' % (self.prefix, field_name) if self.prefix else field_name

 

I see a possibility to solve that for now. Overwrite function _construct_form.

Other options?

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[Matthew Pava]

You may want to consider using the django-angular (https://github.com/jrief/django-angular) package and reading this question:

https://stackoverflow.com/questions/32978137/using-formsets-in-django-angular

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