TypeError: __init__() 得到了一个意外的关键字参数“选择”

Question

TypeError: init () got an unexpected keyword argument 'choices'

forms.py

class StudentMarksheetform2(forms.Form):
    subject_code=(
        (1,'CS101'),
        (2,'CS102'),
        (3,'CS103'),
        (4,'CS104'),
        (5,'CS105'),
        (6,'CS106')
    )
    code_title=forms.IntegerField(choices=subject_code,default='1')

    class Meta():
        model=StudentMarksheetdata2
        fields=['code_title']

Answer 1

This is a form. A form deals with interacting with the user. An IntegerField of forms has no choices . After all the IntegerField of models deals with how we store data in the database.

You can use a TypedChoiceField [Django-doc] for this:

class StudentMarksheetform2(forms.Form):
    SUBJECT_CODE = (
        (1,'CS101'),
        (2,'CS102'),
        (3,'CS103'),
        (4,'CS104'),
        (5,'CS105'),
        (6,'CS106')
    )

    code_title=forms.choices=SUBJECT_CODE, initial=1
    
    class Meta:
        model=StudentMarksheetdata2
        fields=['code_title']

Answer 2

"forms.IntegerField()" doesn't have "choices" and "default" options different from "models.IntegerField()" which has "choices" and "default" options .

So, to have Dropdown Single Select Box using the fields(classes) from "django.forms" , use "ChoiceField" or "TypedChoiceField" which have "choices" and "initial" options as shown below. * "initial" option is equivalent to "default" option :

"ChoiceField" :

# "forms.py"

from django import forms

class StudentMarksheetform2(forms.Form):
    
    # ...
    
    code_title=forms.ChoiceField(choices=SUBJECT_CODE, initial=1)
    
    # ...

"TypedChoiceField" :

# "forms.py"

from django import forms

class StudentMarksheetform2(forms.Form):
    
    # ...
    
    code_title=forms.TypedChoiceField(choices=SUBJECT_CODE, initial=1)
    
    # ...