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These instructions will get you a copy of the project up and running on your local machine for development and testing purposes. See deployment for notes on how to deploy the project on a live system.
All of the below properties or methods, when requested/called in JavaScript, will trigger the browser to synchronously calculate the style and layout*. This is also called reflow or layout thrashing, and is common performance bottleneck.
Generally, all APIs that synchronously provide layout metrics will trigger forced reflow / layout. Read on for additional cases and details.
elem.offsetLeft
, elem.offsetTop
, elem.offsetWidth
, elem.offsetHeight
, elem.offsetParent
TLDR: The cascade={"remove"}
is like a "software" onDelete="CASCADE"
, and will remove objects from the database only when an explicit call to $em->remove()
occurs. Thus, it could result in more than one object being deleted. orphanRemoval
can remove objects from the database even if there was no explicit call to ->remove()
.
I answered this question a few times to different people so I will try to sum things up in this Gist.
Let's take two entities A
and B
as an example. I will use a OneToOne relationship in this example but it works exactly the same with OneToMany relationships.
class A