# ModelForm (SelectField -- Slug Auto) **URL:** \ **Category:** Using Django\ **Created:** [August 14, 2021, 8:38am UTC](https://forum.djangoproject.com/t/modelform-selectfield-slug-auto/9231 "2021-08-14T08:38:49Z")\ **Posts on this page:** 2\ **Page:** 1
**Author:** ![AhmdMWddh](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/ahmdmwddh/32/21707_2.png) [@AhmdMWddh](https://forum.djangoproject.com/u/AhmdMWddh)\ **Post date:** [August 14, 2021, 8:38am UTC](https://forum.djangoproject.com/t/modelform-selectfield-slug-auto/9231/1 "2021-08-14T08:38:49Z")
thanks in Advance, i am making simple database for company i work in, gateway for employees insert items and categories, 1- for categories i did for it a parent `self` and here i need to make it select in the form when i add item, i am using ModelForm. What i think is to make the field in model form as a select field, is it possible. 2- for slug in item: i made it automatically created from name and sku and i did that in `Admin.py` page, but when i add it in ModelForm i add as Text, is there any way i can make it automatically use logic i need name and sku. this is some code: Models.py ```auto from django.db import models from django.urls import reverse def uploaded_item_image(self, filename): return f'Items-Data/{self.sku}/{self.sku}.png' class Category(models.Model): name = models.CharField(verbose_name='Name', max_length=255) parent = models.ForeignKey('self', blank=True, null=True, on_delete=models.SET_NULL) description = models.TextField(verbose_name='Description', blank=True, null=True) def __str__ (self): return self.name class Meta: verbose_name_plural = 'Categories' class Item(models.Model): def cad_upload(self, filename): return f'Items-Data/{self.sku}/{self.sku}-cad.cad' def film_upload(self, filename): return f'Items-Data/{self.sku}/{self.sku}-film.docx' def patron_upload(self, filename): return f'Items-Data/{self.sku}/{self.sku}-patron.excel' category = models.ForeignKey(Category, blank=True, null=True, on_delete=models.SET_NULL) name = models.CharField(verbose_name='Name', max_length=255) sku = models.CharField(verbose_name='Code', max_length=255) slug = models.SlugField(verbose_name='Slug', unique=True) description = models.TextField(verbose_name='Description') barcode = models.CharField(verbose_name='Barcode', max_length=255) weight = models.CharField(verbose_name='Weight', max_length=255) height = models.CharField(verbose_name='Height', max_length=255) length = models.CharField(verbose_name='Length', max_length=255) width = models.CharField(verbose_name='Width', max_length=255) age = models.IntegerField(verbose_name='Age') image = models.ImageField(verbose_name='Image', upload_to=uploaded_item_image) cad_file = models.FileField(verbose_name='Cad File', upload_to=cad_upload) film = models.FileField(verbose_name='film', upload_to=film_upload) patron = models.FileField(verbose_name='patron', upload_to=patron_upload) def item_dimension(self): dimension = f'{self.length} x {self.width} x {self.height} cm' return dimension def __str__ (self): return f'{self.name} - {self.sku}' ``` Forms.py ```auto from django import forms from django.forms import ModelForm from .models import Item, Category class CategoryForm(ModelForm): class Meta: model = Category fields = ' __all__' labels = { 'name': '', 'parent': '', 'description': '' } widgets = { 'name': forms.TextInput(attrs={ 'class': 'form-control', 'placeholder': 'Enter Category Name' }), 'parent': forms.TextInput(attrs={ 'class': 'form-control', 'placeholder': 'Enter Category Parent' }), 'description': forms.TextInput(attrs={ 'class': 'form-control', 'placeholder': 'Enter Category Description' }), } class ItemForm(ModelForm): class Meta: model = Item fields = ['name', 'sku', 'description', 'barcode', 'weight', 'height', 'length', 'width', 'age'] labels = { 'name': '', 'sku': '', 'description': '', 'barcode': '', 'weight': '', 'height': '', 'length': '', 'width': '', 'age': '', } widgets = { 'name': forms.TextInput(attrs={ 'class': 'form-control', 'placeholder': 'Enter Item Name' }), 'sku': forms.TextInput(attrs={ 'class': 'form-control', 'placeholder': 'Enter SKU Code' }), 'description': forms.TextInput(attrs={ 'class': 'form-control', 'placeholder': 'Enter Item Description' }), 'barcode': forms.TextInput(attrs={ 'class': 'form-control', 'placeholder': 'Enter Item Barcode' }), 'weight': forms.TextInput(attrs={ 'class': 'form-control', 'placeholder': 'Enter Item Weight' }), 'height': forms.TextInput(attrs={ 'class': 'form-control', 'placeholder': 'Enter Item Height' }), 'length': forms.TextInput(attrs={ 'class': 'form-control', 'placeholder': 'Enter Item Length' }), 'width': forms.TextInput(attrs={ 'class': 'form-control', 'placeholder': 'Enter Item Width' }), 'age': forms.NumberInput(attrs={ 'class': 'form-control', 'placeholder': 'Enter Item Age' }) } ``` ---
**Author:** ![KenWhitesell](https://sea2.discourse-cdn.com/flex026/user_avatar/forum.djangoproject.com/kenwhitesell/32/280_2.png) [@KenWhitesell](https://forum.djangoproject.com/u/KenWhitesell)\ **Post date:** [August 14, 2021, 11:36am UTC](https://forum.djangoproject.com/t/modelform-selectfield-slug-auto/9231/2 "2021-08-14T11:36:14Z")
I’m not sure I’m exactly following what you’re asking for here. It seems to me like what you’re trying to do is set a field in your model to the result of a function that references two other fields. Is that correct? If so, you can set the value by calling that logic in one of a couple different places. Your options include (among others): - The [`clean`](https://docs.djangoproject.com/en/3.2/ref/forms/validation/#form-and-field-validation) method of the form. - The [`is_valid`](https://docs.djangoproject.com/en/3.2/topics/forms/#the-view) section of your view. - The [`save`](https://docs.djangoproject.com/en/3.2/topics/db/models/#overriding-predefined-model-methods) method in your model The idea for all these is the same - this is a calculated value, not something editable by the user. So if my understanding of your requirements isn’t correct, this isn’t the right answer.