Django editable=False and still show in fieldsets?

Question

I have an image field in my models.py...

 qr_image = models.ImageField(
        upload_to="public/uploads/",
        height_field="qr_image_height",
        width_field="qr_image_width",
        null=True,
        blank=True,
        editable=False
    )

When it's editable=False I get a nasty error when trying show it. I don't want the field editable, however I do want the image to show in admin 'edit' page i.e. fieldsets

I'm new to Django, can someone tell me if this is possible and point me in the right direction here?

thank you.

Answer 1

If you have a ModelAdmin like this:

class MyModelAdmin(admin.ModelAdmin):

    fieldsets = [
        ('Fieldset', {'fields': ['model_field', 'another_field', 'readonly_field']}),
    ]

where readonly_field has editable=False or if it is a DateTimeField with auto_now_add=True then visiting the admin page for your model will result in a field not found error.

To include a readonly field in your fieldsets, include readonly_fields like this:

class MyModelAdmin(admin.ModelAdmin):

    fieldsets = [
        ('Fieldset', {'fields': ['model_field', 'another_field', 'readonly_field']}),
    ]
    readonly_fields = ('readonly_field',)