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The code above works fine when using CharField so I have assumed you want to get this working with TextField instead.
When defining a Django model’s field, each field comes with a default widget, CharField has some smarter handling for when choices is provided to the field and uses the Select widget.
However, the TextField‘s default widget is the TextArea so you need to provide Wagtail with the widget you want to use.
Widgets are a Django term for how to present the field as a HTML field, the Select widget is what you want to use for a drop-down but there are many other build in widgets.
Finally, to tell Wagtail what widget to use for the FieldPanel you need to pass in a widget kwarg.
After this, you should see that the UI will show a select drop down but will be stored as a TextField in the database.
Example: models.py
from django import forms
from django.db import models
class MyPage(Page):
# ... other fields
class ThesisStatus(models.TextChoices):
OPEN = "O", "Offen"
TAKEN = "T", "Vergeben"
WORK_IN_PROGRESS = "W", "In Arbeit"
COMPLETED = "C", "Komplett"
ABORTED = "A", "Abgebrochen"
# note: using `models.TextField` here
status = models.TextField(
max_length=1,
choices=ThesisStatus.choices,
default=ThesisStatus.OPEN,
)
content_panels = Page.content_panels + [
FieldPanel("status", widget=forms.Select), # note: using widget here
# ... other panels
]