CODEWITHSUNDEEP
djangodjango-forms
lanadeltaco
lanadeltaco

Reputation: 108

Django Form Logic: Split and display prefilled values

Let's say I have a model that holds several different charfields.

models.py

class Items(models.Model):
    languages = models.Charfield(...)
    title = models.Charfield(...)
    audio = models.Charfield(...)

The data is saved within each with a delimiter ("||"). I would like to create a form that splits the data then prefills the value with the saved data.

Theoretically: 

{'languages': 'English||French||German'}
{'title': '1.1||Red Balloon||Banana'}
{'audio': 'yes||no||yes'}

Would be split to:

{'languages': ['English', 'French', 'German']}
{'title': ['1.1', 'Red Balloon', 'Banana']}
{'audio': ['yes', 'no', 'yes']}

Then each value would auto-populate the value field. Eventually displaying as:

<tr>
  <td><input type="text" name="languages[]" value="English"></td>
  <td><input type="text" name="title[]" value="1.1"></td>
  <td><input type="text" name="audio[]" value="yes"></td>
</tr>
<tr>
  <td><input type="text" name="languages[]" value="French"></td>
  <td><input type="text" name="title[]" value="Red Balloon"></td>
  <td><input type="text" name="audio[]" value="no"></td>
</tr>
...

As each row would have a different amount of 'languages', for example, what is the preferred way to create this type of form. I am using Django 1.11. First question posted, so if I have missed something within this post, would you kindly let me know? I also have searched for information related to this, however I have yet to find a solution. Thanks!

--Edited to reflect that charFields hold the user input. In this example, the inputs 'languages' and 'title' are not consistent enough to use them as multiple-choice fields.

Upvotes: 1

Views: 67

Answers (2)

VMatić
VMatić

Reputation: 996

Take a look at Django Formsets.

In your case you'd want to first define some sort of ItemForm:

from django import forms
class ItemForm(forms.Form):
    language = forms.CharField()
    setting = forms.CharField()
    audio = forms.CharField()

In your views.py, you can then define a formset with the initial form data:

from django.forms import formset_factory
from myapp.forms import ItemForm

item = Items.objects.all()[0] # replace this with your actual query
languages = item.languages.split('||')
settings = item.settings.split('||')
audios = item.audio.split('||')
ItemFormSet = formset_factory(ItemForm, extra=len(languages))
formset = ItemFormSet(initial=[
    {'language': language,
     'setting': setting,
     'audio':audio,
    } for language, setting, audio in zip(languages, settings, audios)])

Upvotes: 1

vmonteco
vmonteco

Reputation: 15423

Perhaps you should simply consider ChoiceFields.

Upvotes: 0

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