Hello people :) I am struggling with optimizing an admin with inlines which causes too many database requests.
My model structure is like this: class ExampleA(models.Model): ... class ExampleB(models.Model): aexample = models.ForeignKey('ExampleA', related_name='bexamples') cexample = models.ForeignKey('ExampleC') dexample = models.ForeignKey('ExampleD') eexample = models.ForeignKey('ExampleE') ... class ExampleC(models.Model): ... class ExampleD(models.Model): ... class ExampleE(models.Model): ... The admin classes: class ExampleBInline(admin.StackedInline): model = ExampleB extra = 0 class ExampleAAdmin(admin.ModelAdmin): inlines = [ExampleBInline] admin.site.register(ExampleA, ExampleAAdmin) As I can see with django-debug-toolbar, when rendering the admin template for the inline formset with the forms for ExampleB objects, a new db request is sent to db server for each related field of each ExampleB object. Particularly, I am seeing a lot of queries like these: SELECT ••• FROM `examplec` WHERE `examplec`.`id` = 1 LIMIT 21 SELECT ••• FROM `examplee` WHERE `examplee`.`id` = 2 LIMIT 21 SELECT ••• FROM `examplec` WHERE `examplec`.`id` = 2 LIMIT 21 SELECT ••• FROM `exampled` WHERE `exampled`.`id` = 2 LIMIT 21 SELECT ••• FROM `examplee` WHERE `examplee`.`id` = 3 LIMIT 21 The template context is this (I am using grappelli): 21 {% if field.is_readonly %} 22 <div class="grp-readonly">{{ field.contents|linebreaksbr }}</div> 23 {% else %} the marked line => 24 {{ field.field }} 25 {% endif %} 26 {% endif %} 27 {% if line.fields|length_is:'1' %}{{ line.errors }}{% endif %} I have tried the following optimizations: First try: class ExampleAAdmin(admin.ModelAdmin): inlines = [ExampleBInline] def get_queryset(self, request): qs = super(ExampleAAdmin, self).get_queryset(request) return qs.prefetch_related('bexamples', 'bexamples__cexample', 'bexamples__dexample', 'bexamples__example') Second try: class ExampleBInline(admin.StackedInline): model = ExampleB extra = 0 def get_queryset(self, request): qs = super(ExampleInline, self).get_queryset(request) return qs.select_related('cexample', 'dexample', 'eexample') Third try: class BaseExampleBFormSet(BaseInlineFormSet): def __init__(self, *args, **kwargs): super(BaseExampleBFormSet, self).__init__(*args, **kwargs) qs = self.queryset self.queryset = qs.select_related('cexample', 'dexample', 'eexample') ExampleBFormSet = inlineformset_factory(ExampleA, ExampleB, formset=BaseExampleBFormSet) class ExampleBInline(admin.StackedInline): model = ExampleB extra = 0 formset = ExampleBFormSet Unfortunately, none of the above works. So, I would be really grateful if anyone could help on this by giving any hint or pointing out what could be possibly missing. Or, could I have hit a restriction of django admin's internals? Thank you in advance, Petros -- You received this message because you are subscribed to the Google Groups "Django users" group. To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscr...@googlegroups.com. To post to this group, send email to django-users@googlegroups.com. Visit this group at http://groups.google.com/group/django-users. To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/5499A2A1.3040403%40yahoo.gr. For more options, visit https://groups.google.com/d/optout.