form to override autocomplete organization field for Person class in admin

app/admin.py

@@ -7,6 +7,21 @@ from django.forms import TextInput
 from django.conf import settings
 from django.http import HttpResponse
 import csv
+from django import forms
+from django.contrib.admin.widgets import AutocompleteSelect
+
+class autocomplete_fields_form(forms.ModelForm): 
+    """This form overrides autocomplete 
+    organization field for Person class
+    """
+    class Meta:
+        widgets = {
+            'my_field': AutocompleteSelect(
+                Person._meta.get_field('organization').remote_field,
+                admin.site,
+                attrs={'data-dropdown-auto-width': 'true'}
+            ),
+        }
 
 def download_csv(modeladmin, request, queryset):
     name     =  queryset[0].__class__.__name__
@@ -85,13 +100,13 @@ class PersonAdmin(admin.ModelAdmin):
         }),
     )
     list_display = ['id', 'full_name', 'organization']
-    autocomplete_fields = ['organization']
+    #autocomplete_fields = ['organization']
+    form = autocomplete_fields_form # adjust width of autocomplete_fields organization
+
     list_per_page = settings.ADMIN_LIST_PER_PAGE
     ordering = ['full_name']
     actions = [download_csv]
 
-#    list_display_links = ['id']
-
 
 class ResourceKeywordInline(admin.TabularInline):
     autocomplete_fields = ['keyword']