OneToOneField not working with inlineadmin

[alex]

This class hierarchy doesn't work with inlineadmin:

class hierarchy:

models.py:

class d:
  pass
class a:
  d = models.OneToOneField(d, on_delete=models.CASCADE, related_name="host")
class b:
  pass

admin.py

class dInlineAdmin(admin.TabularInline):
    model = d

@admin.register(b)
class bSpecializedAdmin(admin.ModelAdmin):
    inlines = [
        dInlineAdmin,
    ]

Error message:
<class 'x.admin.RequirementInlineAdmin'>: (admin.E202) 'x.Requirement' has no field named 'host'.

'host' is the related_name

[kapil garg]

I think, InlineModelAdmin works for models which have related objects. In your example,

# admin.py
class dInlineAdmin(admin.TabularInline):
    model = d

@admin.register(b)
class bSpecializedAdmin(admin.ModelAdmin):
    inlines = [
        dInlineAdmin,
    ]

model "b" is not related to model "d" and thus causing the exception. The following code will work

# admin.py
class aInlineAdmin(admin.TabularInline):
    model = a

@admin.register(d)
class dSpecializedAdmin(admin.ModelAdmin):
    inlines = [
        aInlineAdmin,
    ]