Fixed #28319 -- Made TextField with choices use a Select widget.

django/db/models/fields/__init__.py

@@ -2109,7 +2109,9 @@ class TextField(Field):
         # Passing max_length to forms.CharField means that the value's length
         # will be validated twice. This is considered acceptable since we want
         # the value in the form field (to pass into widget for example).
-        defaults = {'max_length': self.max_length, 'widget': forms.Textarea}
+        defaults = {'max_length': self.max_length}
+        if not self.choices:
+            defaults['widget'] = forms.Textarea
         defaults.update(kwargs)
         return super().formfield(**defaults)
 

tests/model_fields/test_textfield.py

 from unittest import skipIf
 
+from django import forms
 from django.db import connection, models
 from django.test import TestCase
 
@@ -18,6 +19,11 @@ class TextFieldTests(TestCase):
         self.assertIsNone(tf1.formfield().max_length)
         self.assertEqual(2345, tf2.formfield().max_length)
 
+    def test_choices_generates_select_widget(self):
+        """A TextField with choices uses a Select widget."""
+        f = models.TextField(choices=[('A', 'A'), ('B', 'B')])
+        self.assertIsInstance(f.formfield().widget, forms.Select)
+
     def test_to_python(self):
         """TextField.to_python() should return a string."""
         f = models.TextField()