Drupal Dump

If you get error like in subject when doing import of configuration, there is a good chance someone forgot to add some YAML file. In example

You should have BREW installed and then run

brew install php@7.4

If you get problem with linking newly installed PHP and get error like

Could not symlink sbin/php-fpm
/usr/local/sbin is not writable.

next thing to do is this.
 

Drupal removed its automatic entity-updates API in 8.7. See https://www.drupal.org/node/3034742. so you can no longer run drush entup in your CLI,  at least unless you install this module https://www.drupal.org/project/devel_entity_updates 

If you are getting something like

To get all method names you can run on any field added to any entity, input this into devel/php

ksm(get_class_methods('\Drupal\Core\Field\FieldItemList'));

There are 2 system in drupal 7 for IP blocking, one is flood blocking that is used on login and other is 
system_block_ip_action that is storing IP's in blocked_ips table and checking them while bootstrapping.

drush ev 'cache_set("foo", "bar", "cache");'
drush ev '$x = new MemCacheDrupal("cache"); print_r($x->get("foo"));'

snippet to check if memcache is working.

This problem with access permissions has become common in latest versions of Mac OS, you need to give permissions to apps (executables) so they can do/use stuff on your disk/computer. Most of the times you will get a prompt for asking/checking this but sometimes this will quietly fail.

You fixed something in contrib module and you want to create quick patch from that, if it spans through multiple commits, best way to do that is to make a patch from multiple commits, to combine them into one file, write this

So you have and order, but don't know how to get to payments that are referencing this order, there are few ways you can achieve that. First is to load it by properties

$payments = \Drupal::entityTypeManager()->getStorage('commerce_payment')->loadByProperties(['order_id' => $order->id()]);

second is to load them by order