How to add readonly inline on django admin

Question

I am using django 1.4 and I have a many2many field, so when creating the admin site I wanted to add this field as an inline, here is some code:

class SummaryInline(admin.TabularInline):
    model = ParserError.summaries.through


class MyClassAdmin(admin.ModelAdmin):
    list_display = ('classifier', 'name', 'err_count', 'supported')
    fields = ('classifier', 'name', 'err_count', 'err_classifier', 'supported')
    inlines = (SummaryInline,)
    readonly_fields = ('classifier', 'err_count')

So my question is, how can I make the inline field readonly?

score 79 · Accepted Answer · edited May 23 '17 at 12:02

79

After a while of trying to find the name I figured out thanks to this answer, so I checked the names at self.opts.local_fields and found the name of the middle table and added it to readonly_fields, setting can_delete to False.

class SummaryInline(admin.TabularInline):
    model = ParserError.summaries.through
    readonly_fields = ('myclasssummary',)
    can_delete = False

pretty simple but took me a while so I figured out it was a good idea to add it here.

edited May 23 '17 at 12:02

Community

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answered Jun 14 '13 at 22:43

Hassek

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I'm not sure you can/should use `can_delete = False`. You can use `def has_delete_permission(self, request, obj=None): return False` instead. See docs: https://docs.djangoproject.com/en/2.1/ref/contrib/admin/ – Rustam Guliev Aug 28 '18 at 23:33
2

what is `myclasssummary` in the `readonly_fields`? is it table name or field name from `summaries` model? – Raju Singh Dec 17 '18 at 05:43
@tamarabyte answer worked for me, not this one. Maybe change the accepted answer ? – Arnaud P Jan 05 '22 at 17:00
@RustamGuliev I can't see anything in the documentation that says `can_delete` shouldn't be used. – alstr Nov 28 '22 at 09:44

score 47 · Answer 2 · answered Jun 08 '15 at 08:41

47

Additionally, if you do not want the ability to add/delete the rows, you can add these definitions.

def has_add_permission(self, request, obj=None):
    return False

def has_delete_permission(self, request, obj=None):
    return False

answered Jun 08 '15 at 08:41

Keval Prabhu

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Add these functions below `class SummaryInline(admin.TabularInline):` – jerrymouse Jul 27 '19 at 06:33

tamarabyte · Answer 3 · 2019-10-31T22:24:05.943

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You can make the entire inline readonly by adding:

class UnitsInline(admin.TabularInline):

    def has_change_permission(self, request, obj=None):
        return False

This will prevent anyone from editing the entry from the admin.

Another example that prevents, adding, deletion and displays all the inline fields as readonly:

class ReadOnlyInline(admin.TabularInline):
    def has_change_permission(self, request, obj=None):
        return False

    def has_add_permission(self, request, obj=None):
        return False

    def has_delete_permission(self, request, obj=None):
        return False

    def get_readonly_fields(self, request, obj=None):
        return list(super().get_fields(request, obj))

edited Oct 31 '19 at 22:24

answered Jan 09 '19 at 16:39

tamarabyte

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I'm using django 1.11 and this causes no related records to show. I guess because I can't edit them? – Matt Oct 31 '19 at 14:15
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You'll have to add whatever fields you want to show up for the inline as readonly fields. I'll update my answer with an example. – tamarabyte Oct 31 '19 at 22:22
For me, this prevents the inline from being rendered even for folks that have those permissions. – Daniel Schaffer Mar 16 '21 at 18:34
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This worked for me, but the `get_readonly_fields` was not required. Also make sure you specify `model`. – alstr Jun 09 '21 at 13:11
@Matt I'm also using 1.11 and have the same problem. If I'm not mistaken, I believe this was fixed last year with this ticket in a much newer version of Django -- https://code.djangoproject.com/ticket/31867 – Sean D. Oct 04 '22 at 19:45

score 4 · Answer 4 · edited Jan 11 '22 at 11:23

4

Thanks Keval Prabhu

class UnitsInline(admin.TabularInline):
    model = Units
    extra = 0
    verbose_name = 'Units'
    verbose_name_plural = 'Units of company'
    
    def has_add_permission(self, request, obj=None):
        return False
    def has_delete_permission(self, request, obj=None):
        return False

edited Jan 11 '22 at 11:23

VisioN

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answered Sep 28 '17 at 09:56

Muhammad Hafid

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Why is ** for has_add_permission, it throws an error for me – Kiran Reddy Jan 02 '20 at 13:57
he was trying to bold. Ignore the `**` – Harry Vane May 06 '20 at 23:07

How to add readonly inline on django admin

4 Answers4