Django-Admin: CharField as TextArea

maxp_21152 0
Viewed 88707

I have 

class Cab(models.Model):
    name  = models.CharField( max_length=20 )
    descr = models.CharField( max_length=2000 )

class Cab_Admin(admin.ModelAdmin):
    ordering     = ('name',)
    list_display = ('name','descr', )
    # what to write here to make descr using TextArea?

admin.site.register( Cab, Cab_Admin )

how to assign TextArea widget to 'descr' field in admin interface?

upd:
In Admin interface only!

Good idea to use ModelForm.

django-admin django
9 Answers

You will have to create a forms.ModelForm that will describe how you want the descr field to be displayed, and then tell admin.ModelAdmin to use that form. For example:

from django import forms
class CabModelForm( forms.ModelForm ):
    descr = forms.CharField( widget=forms.Textarea )
    class Meta:
        model = Cab

class Cab_Admin( admin.ModelAdmin ):
    form = CabModelForm

The form attribute of admin.ModelAdmin is documented in the official Django documentation. Here is one place to look at.

ayaz_231910

For this case, the best option is probably just to use a TextField instead of CharField in your model. You can also override the formfield_for_dbfield method of your ModelAdmin class:

class CabAdmin(admin.ModelAdmin):
    def formfield_for_dbfield(self, db_field, **kwargs):
        formfield = super(CabAdmin, self).formfield_for_dbfield(db_field, **kwargs)
        if db_field.name == 'descr':
            formfield.widget = forms.Textarea(attrs=formfield.widget.attrs)
        return formfield
Carl_Meyer_32070

You don't need to create the form class yourself:

from django.contrib import admin
from django import forms

class MyModelAdmin(admin.ModelAdmin):
    def get_form(self, request, obj=None, **kwargs):
        kwargs['widgets'] = {'descr': forms.Textarea}
        return super().get_form(request, obj, **kwargs)

admin.site.register(MyModel, MyModelAdmin)

See ModelAdmin.get_form.

user_524990

You can subclass your own field with needed formfield method:

class CharFieldWithTextarea(models.CharField):

    def formfield(self, **kwargs):
        kwargs.update({"widget": forms.Textarea})
        return super(CharFieldWithTextarea, self).formfield(**kwargs)

This will take affect on all generated forms.

Daevaorn_197720

Instead of a models.CharField, use a models.TextField for descr.

user_288040

You can use models.TextField for this purpose:

class Sample(models.Model):
    field1 = models.CharField(max_length=128)
    field2 = models.TextField(max_length=1024*2)   # Will be rendered as textarea
user_71762430
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