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?

Rataplan

Answer 1

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.

Rataplan

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: docs.djangoproject.com/en/2.1/ref/contrib/admin – Dialecticism

what is myclasssummary in the readonly_fields? is it table name or field name from summaries model? – Quamash

@tamarabyte answer worked for me, not this one. Maybe change the accepted answer ? – Hemia

@RustamGuliev I can't see anything in the documentation that says can_delete shouldn't be used. – Cicely

Answer 2

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

Devotion

Add these functions below class SummaryInline(admin.TabularInline): – Darill

Answer 3

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))

Sherrellsherrer

I'm using django 1.11 and this causes no related records to show. I guess because I can't edit them? – Hubbell

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. – Sherrellsherrer

For me, this prevents the inline from being rendered even for folks that have those permissions. – Pasahow

This worked for me, but the get_readonly_fields was not required. Also make sure you specify model. – Cicely

@Hubbell 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 -- code.djangoproject.com/ticket/31867 – Breger

Answer 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

Shaggy

Why is ** for has_add_permission, it throws an error for me – Diatomite

he was trying to bold. Ignore the ** – Dimitry