Remove a migration operation failing on Django 6.0 (safe)

ram/bookshelf/admin.py

@@ -2,7 +2,7 @@ import html
 
 from django.conf import settings
 from django.contrib import admin
-from django.utils.html import format_html, strip_tags
+from django.utils.html import format_html, format_html_join, strip_tags
 from adminsortable2.admin import SortableAdminBase, SortableInlineAdminMixin
 
 from ram.admin import publish, unpublish
@@ -123,13 +123,14 @@ class BookAdmin(SortableAdminBase, admin.ModelAdmin):
     @admin.display(description="Invoices")
     def invoices(self, obj):
         if obj.invoice.exists():
-            html = "<br>".join(
-                "<a href=\"{}\" target=\"_blank\">{}</a>".format(
-                    i.file.url, i
-                ) for i in obj.invoice.all())
+            html = format_html_join(
+                "<br>",
+                "<a href=\"{}\" target=\"_blank\">{}</a>",
+                ((i.file.url, i) for i in obj.invoice.all())
+            )
         else:
             html = "-"
-        return format_html(html)
+        return html
 
     @admin.display(description="Publisher")
     def get_publisher(self, obj):
@@ -207,7 +208,7 @@ class PublisherAdmin(admin.ModelAdmin):
     @admin.display(description="Country")
     def country_flag(self, obj):
         return format_html(
-            '<img src="{}" /> {}'.format(obj.country.flag, obj.country.name)
+            '<img src="{}" /> {}', obj.country.flag, obj.country.name
         )
 
 
@@ -285,13 +286,14 @@ class CatalogAdmin(SortableAdminBase, admin.ModelAdmin):
     @admin.display(description="Invoices")
     def invoices(self, obj):
         if obj.invoice.exists():
-            html = "<br>".join(
-                "<a href=\"{}\" target=\"_blank\">{}</a>".format(
-                    i.file.url, i
-                ) for i in obj.invoice.all())
+            html = format_html_join(
+                "<br>",
+                "<a href=\"{}\" target=\"_blank\">{}</a>",
+                ((i.file.url, i) for i in obj.invoice.all())
+            )
         else:
             html = "-"
-        return format_html(html)
+        return html
 
     def download_csv(modeladmin, request, queryset):
         header = [

ram/bookshelf/migrations/0016_basebook_book_catalogue.py

@@ -101,10 +101,10 @@ class Migration(migrations.Migration):
             model_name="basebook",
             name="old_title",
         ),
-        migrations.RemoveField(
-            model_name="basebook",
-            name="old_authors",
-        ),
+        # migrations.RemoveField(
+        #     model_name="basebook",
+        #     name="old_authors",
+        # ),
         migrations.RemoveField(
             model_name="basebook",
             name="old_publisher",

ram/bookshelf/migrations/0024_alter_basebook_language.py

@@ -0,0 +1,123 @@
+# Generated by Django 6.0 on 2025-12-03 22:07
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ("bookshelf", "0023_delete_basebookdocument"),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name="basebook",
+            name="language",
+            field=models.CharField(
+                choices=[
+                    ("af", "Afrikaans"),
+                    ("ar", "Arabic"),
+                    ("ar-dz", "Algerian Arabic"),
+                    ("ast", "Asturian"),
+                    ("az", "Azerbaijani"),
+                    ("bg", "Bulgarian"),
+                    ("be", "Belarusian"),
+                    ("bn", "Bengali"),
+                    ("br", "Breton"),
+                    ("bs", "Bosnian"),
+                    ("ca", "Catalan"),
+                    ("ckb", "Central Kurdish (Sorani)"),
+                    ("cs", "Czech"),
+                    ("cy", "Welsh"),
+                    ("da", "Danish"),
+                    ("de", "German"),
+                    ("dsb", "Lower Sorbian"),
+                    ("el", "Greek"),
+                    ("en", "English"),
+                    ("en-au", "Australian English"),
+                    ("en-gb", "British English"),
+                    ("eo", "Esperanto"),
+                    ("es", "Spanish"),
+                    ("es-ar", "Argentinian Spanish"),
+                    ("es-co", "Colombian Spanish"),
+                    ("es-mx", "Mexican Spanish"),
+                    ("es-ni", "Nicaraguan Spanish"),
+                    ("es-ve", "Venezuelan Spanish"),
+                    ("et", "Estonian"),
+                    ("eu", "Basque"),
+                    ("fa", "Persian"),
+                    ("fi", "Finnish"),
+                    ("fr", "French"),
+                    ("fy", "Frisian"),
+                    ("ga", "Irish"),
+                    ("gd", "Scottish Gaelic"),
+                    ("gl", "Galician"),
+                    ("he", "Hebrew"),
+                    ("hi", "Hindi"),
+                    ("hr", "Croatian"),
+                    ("hsb", "Upper Sorbian"),
+                    ("ht", "Haitian Creole"),
+                    ("hu", "Hungarian"),
+                    ("hy", "Armenian"),
+                    ("ia", "Interlingua"),
+                    ("id", "Indonesian"),
+                    ("ig", "Igbo"),
+                    ("io", "Ido"),
+                    ("is", "Icelandic"),
+                    ("it", "Italian"),
+                    ("ja", "Japanese"),
+                    ("ka", "Georgian"),
+                    ("kab", "Kabyle"),
+                    ("kk", "Kazakh"),
+                    ("km", "Khmer"),
+                    ("kn", "Kannada"),
+                    ("ko", "Korean"),
+                    ("ky", "Kyrgyz"),
+                    ("lb", "Luxembourgish"),
+                    ("lt", "Lithuanian"),
+                    ("lv", "Latvian"),
+                    ("mk", "Macedonian"),
+                    ("ml", "Malayalam"),
+                    ("mn", "Mongolian"),
+                    ("mr", "Marathi"),
+                    ("ms", "Malay"),
+                    ("my", "Burmese"),
+                    ("nb", "Norwegian Bokmål"),
+                    ("ne", "Nepali"),
+                    ("nl", "Dutch"),
+                    ("nn", "Norwegian Nynorsk"),
+                    ("os", "Ossetic"),
+                    ("pa", "Punjabi"),
+                    ("pl", "Polish"),
+                    ("pt", "Portuguese"),
+                    ("pt-br", "Brazilian Portuguese"),
+                    ("ro", "Romanian"),
+                    ("ru", "Russian"),
+                    ("sk", "Slovak"),
+                    ("sl", "Slovenian"),
+                    ("sq", "Albanian"),
+                    ("sr", "Serbian"),
+                    ("sr-latn", "Serbian Latin"),
+                    ("sv", "Swedish"),
+                    ("sw", "Swahili"),
+                    ("ta", "Tamil"),
+                    ("te", "Telugu"),
+                    ("tg", "Tajik"),
+                    ("th", "Thai"),
+                    ("tk", "Turkmen"),
+                    ("tr", "Turkish"),
+                    ("tt", "Tatar"),
+                    ("udm", "Udmurt"),
+                    ("ug", "Uyghur"),
+                    ("uk", "Ukrainian"),
+                    ("ur", "Urdu"),
+                    ("uz", "Uzbek"),
+                    ("vi", "Vietnamese"),
+                    ("zh-hans", "Simplified Chinese"),
+                    ("zh-hant", "Traditional Chinese"),
+                ],
+                default="en",
+                max_length=7,
+            ),
+        ),
+    ]

ram/consist/admin.py

@@ -54,7 +54,7 @@ class ConsistAdmin(SortableAdminBase, admin.ModelAdmin):
     @admin.display(description="Country")
     def country_flag(self, obj):
         return format_html(
-            '<img src="{}" /> {}'.format(obj.country.flag, obj.country)
+            '<img src="{}" /> {}', obj.country.flag, obj.country
         )
 
     fieldsets = (

ram/metadata/admin.py

@@ -54,7 +54,7 @@ class CompanyAdmin(admin.ModelAdmin):
     @admin.display(description="Country")
     def country_flag(self, obj):
         return format_html(
-            '<img src="{}" /> {}'.format(obj.country.flag, obj.country.name)
+            '<img src="{}" /> {}', obj.country.flag, obj.country.name
         )
 
 
@@ -68,7 +68,7 @@ class ManufacturerAdmin(admin.ModelAdmin):
     @admin.display(description="Country")
     def country_flag(self, obj):
         return format_html(
-            '<img src="{}" /> {}'.format(obj.country.flag, obj.country.name)
+            '<img src="{}" /> {}', obj.country.flag, obj.country.name
         )
 
 

ram/portal/templatetags/dcc.py

@@ -1,36 +1,38 @@
 from django import template
 from django.utils.html import format_html
+from django.utils.safestring import mark_safe
 
 register = template.Library()
 
 
 @register.simple_tag
 def dcc(object):
-    socket = (
+    socket = mark_safe(
         '<i class="bi bi-ban small"></i>'
     )
     decoder = ''
     if object.decoder_interface is not None:
-        socket = (
+        socket = mark_safe(
             f'<abbr title="{object.get_decoder_interface()}">'
             f'<i class="bi bi-dice-6"></i></abbr>'
         )
     if object.decoder:
         if object.decoder.sound:
-            decoder = (
+            decoder = mark_safe(
                 f'<abbr title="{object.decoder}">'
                 '<i class="bi bi-volume-up-fill"></i></abbr>'
             )
         else:
-            decoder = (
+            decoder = mark_safe(
                 f'<abbr title="{object.decoder}'
                 f'({object.get_decoder_interface()})">'
                 '<i class="bi bi-cpu-fill"></i></abbr>'
             )
-
     if decoder:
         return format_html(
-            f'{socket} <i class="bi bi-arrow-bar-left"></i>{decoder}'
+            '{} <i class="bi bi-arrow-bar-left"></i> {}',
+            socket,
+            decoder,
         )
 
-    return format_html(socket)
+    return socket

ram/ram/__init__.py

@@ -1,4 +1,4 @@
 from ram.utils import git_suffix
 
-__version__ = "0.17.14"
+__version__ = "0.17.15"
 __version__ += git_suffix(__file__)

ram/ram/utils.py

@@ -48,8 +48,9 @@ def git_suffix(fname):
 
 def get_image_preview(url, max_size=150):
     return format_html(
-        '<img src="{src}" style="max-width: {size}px; max-height: {size}px;'
-        'background-color: #eee;" />'.format(src=url, size=max_size)
+        '<img src="{src}" style="max-width: {size}px; max-height: {size}px; background-color: #eee;" />',  # noqa: E501
+        src=url,
+        size=max_size,
     )
 
 

ram/roster/admin.py

@@ -2,7 +2,7 @@ import html
 
 from django.conf import settings
 from django.contrib import admin
-from django.utils.html import format_html, strip_tags
+from django.utils.html import format_html, format_html_join, strip_tags
 
 from adminsortable2.admin import SortableAdminBase, SortableInlineAdminMixin
 
@@ -44,7 +44,7 @@ class RollingClass(admin.ModelAdmin):
     @admin.display(description="Country")
     def country_flag(self, obj):
         return format_html(
-            '<img src="{}" /> {}'.format(obj.country.flag, obj.country)
+            '<img src="{}" /> {}', obj.country.flag, obj.country.name
         )
 
 
@@ -152,7 +152,7 @@ class RollingStockAdmin(SortableAdminBase, admin.ModelAdmin):
     @admin.display(description="Country")
     def country_flag(self, obj):
         return format_html(
-            '<img src="{}" /> {}'.format(obj.country.flag, obj.country)
+            '<img src="{}" /> {}', obj.country.flag, obj.country.name
         )
 
     fieldsets = (
@@ -222,13 +222,14 @@ class RollingStockAdmin(SortableAdminBase, admin.ModelAdmin):
     @admin.display(description="Invoices")
     def invoices(self, obj):
         if obj.invoice.exists():
-            html = "<br>".join(
-                "<a href=\"{}\" target=\"_blank\">{}</a>".format(
-                    i.file.url, i
-                ) for i in obj.invoice.all())
+            html = format_html_join(
+                "<br>",
+                "<a href=\"{}\" target=\"_blank\">{}</a>",
+                ((i.file.url, i) for i in obj.invoice.all())
+            )
         else:
             html = "-"
-        return format_html(html)
+        return html
 
     def download_csv(modeladmin, request, queryset):
         header = [