Code Explainers

Code explainers tagged #query-optimization

ruby 
class DashboardMetrics
  CACHE_TTL = 15.minutes
 
  def initialize(account)

Caching dashboard metrics in Rails

caching service-object query-optimization
Intermediate 5 steps
python 
from django.contrib import admin
from django.utils import timezone
from django.utils.html import format_html
 

Custom columns in the Django admin

admin-customization computed-columns html-rendering
Intermediate 7 steps
java 
@Repository
public interface OrderRepository extends JpaRepository<Order, Long> {
 
    @EntityGraph(attributePaths = {"customer", "lineItems", "lineItems.product"})

Killing N+1 queries with @EntityGraph in Spring

orm fetching n+1-problem
Intermediate 5 steps
python 
from django.db.models import Prefetch, Count
from django.views.generic import ListView
 
from .models import Article, Comment

Building an efficient article list in Django

orm query-optimization prefetching
Intermediate 6 steps