Django Set custom field in form not required

Question

ModelAdmin

class InstrumentAdmin(admin.ModelAdmin):    
    def get_form(self,request, obj=None, **kwargs):
        if obj:
            return UpdateForm
        else:
            return CreateForm

Update Form

class UpdateForm(forms.ModelForm):
    connector = forms.ModelChoiceField(queryset=Connector.objects.all(), widget=forms.Select(attrs={'disabled':'disabled'}), initial='multiplate')

    class Meta:
        model = Instrument
        fields = ['connector','name']

I have set initial value for the ChoiceField. But when i access the change of the model and Save, it prompt me "This field is required" for the field connector.

How can I make the field not mandatory in this case? Because it will always have a value there.

If it will always have a value, then it *is* mandatory, surely? — Daniel Roseman, Sep 21 '16 at 10:01
Yes, that's the weird part. Can check the photo below. http://s16.postimg.org/o25nng19h/Capture.png — soohan, Sep 21 '16 at 10:33
If I set Required=False for ModelChoiceField, initial value will be missing. — soohan, Sep 21 '16 at 10:34
I have added ModelAdmin form above. I return UpdateForm if it is Change. In the UpdateForm, I create a new custom field named Connector and set an initial value (the value is existing in the database Connector table) — soohan, Sep 21 '16 at 10:39
Found out one thing. Even if I set initial='', it will show me multiplate also. Huh? What happening. — soohan, Sep 21 '16 at 10:43

score 0 · Answer 1 · answered Sep 21 '16 at 11:04

0

Fixes:

initial=pk instead of name
Add required=False

answered Sep 21 '16 at 11:04

soohan

137
1
9

score 0 · Answer 2 · answered Sep 21 '16 at 11:27

0

The problem is with your attributes. Change:

attrs={'disabled':'disabled'}

to

attrs={'readonly':'readonly'}

Disabled does not send back data to the server while readonly does it.

answered Sep 21 '16 at 11:27

Ruqaiya Saad

16

Using attrs={'readonly':'readonly'} help in showing data. But the dropdown still able to change using readonly – soohan Sep 26 '16 at 06:35
The selected answer of this would answer that: http://stackoverflow.com/questions/8100351/how-to-make-a-dropdown-readonly-using-jquery – Ruqaiya Saad Sep 26 '16 at 07:22

Django Set custom field in form not required

2 Answers2