SilverStripe lessons - topic difficulty

Question Title

* 1. A new set of SilverStripe lessons covering more complex topics is proposed, please indicate below where you think the topic fits in terms of difficulty.

Are we missing an important topic? Please add.

	Intermediate	Advanced	I don't know enough about the topic to rate
Implementing search	Implementing search Intermediate	Implementing search Advanced	Implementing search I don't know enough about the topic to rate
Getting the most out of your templates	Getting the most out of your templates Intermediate	Getting the most out of your templates Advanced	Getting the most out of your templates I don't know enough about the topic to rate
How to install sake, and use it for database builds, tasks, testing	How to install sake, and use it for database builds, tasks, testing Intermediate	How to install sake, and use it for database builds, tasks, testing Advanced	How to install sake, and use it for database builds, tasks, testing I don't know enough about the topic to rate
The shortcomings of ORM: when to use custom SQL	The shortcomings of ORM: when to use custom SQL Intermediate	The shortcomings of ORM: when to use custom SQL Advanced	The shortcomings of ORM: when to use custom SQL I don't know enough about the topic to rate
Adding AJAX behavior	Adding AJAX behavior Intermediate	Adding AJAX behavior Advanced	Adding AJAX behavior I don't know enough about the topic to rate
Git workflow: rebasing, squashing	Git workflow: rebasing, squashing Intermediate	Git workflow: rebasing, squashing Advanced	Git workflow: rebasing, squashing I don't know enough about the topic to rate
Introduction to Dependency Injection	Introduction to Dependency Injection Intermediate	Introduction to Dependency Injection Advanced	Introduction to Dependency Injection I don't know enough about the topic to rate
Enriching your login experience with custom templates, authenticators, and SSO	Enriching your login experience with custom templates, authenticators, and SSO Intermediate	Enriching your login experience with custom templates, authenticators, and SSO Advanced	Enriching your login experience with custom templates, authenticators, and SSO I don't know enough about the topic to rate
Complex data relations: many_many, belongs_many_many, extraFields, ambigious has_many	Complex data relations: many_many, belongs_many_many, extraFields, ambigious has_many Intermediate	Complex data relations: many_many, belongs_many_many, extraFields, ambigious has_many Advanced	Complex data relations: many_many, belongs_many_many, extraFields, ambigious has_many I don't know enough about the topic to rate
Unit testing	Unit testing Intermediate	Unit testing Advanced	Unit testing I don't know enough about the topic to rate
Custom LeftAndMain interface	Custom LeftAndMain interface Intermediate	Custom LeftAndMain interface Advanced	Custom LeftAndMain interface I don't know enough about the topic to rate
Hardening your SilverStripe site: Best practices for security	Hardening your SilverStripe site: Best practices for security Intermediate	Hardening your SilverStripe site: Best practices for security Advanced	Hardening your SilverStripe site: Best practices for security I don't know enough about the topic to rate
Making the Config API work for you, using exclusion/inclusion rules, environment dependent settings, etc	Making the Config API work for you, using exclusion/inclusion rules, environment dependent settings, etc Intermediate	Making the Config API work for you, using exclusion/inclusion rules, environment dependent settings, etc Advanced	Making the Config API work for you, using exclusion/inclusion rules, environment dependent settings, etc I don't know enough about the topic to rate
Error logging and debugging techniques	Error logging and debugging techniques Intermediate	Error logging and debugging techniques Advanced	Error logging and debugging techniques I don't know enough about the topic to rate
Caching (Partial caching and full caching options)	Caching (Partial caching and full caching options) Intermediate	Caching (Partial caching and full caching options) Advanced	Caching (Partial caching and full caching options) I don't know enough about the topic to rate
Configuring framework: password requirements, application name, logo, default admin, custom CMS menu, customising HTMLEditor	Configuring framework: password requirements, application name, logo, default admin, custom CMS menu, customising HTMLEditor Intermediate	Configuring framework: password requirements, application name, logo, default admin, custom CMS menu, customising HTMLEditor Advanced	Configuring framework: password requirements, application name, logo, default admin, custom CMS menu, customising HTMLEditor I don't know enough about the topic to rate
Reading and writing to external APIs	Reading and writing to external APIs Intermediate	Reading and writing to external APIs Advanced	Reading and writing to external APIs I don't know enough about the topic to rate
Creating subcontrollers with $url_handlers	Creating subcontrollers with $url_handlers Intermediate	Creating subcontrollers with $url_handlers Advanced	Creating subcontrollers with $url_handlers I don't know enough about the topic to rate
SilverStripe's Code conventions	SilverStripe's Code conventions Intermediate	SilverStripe's Code conventions Advanced	SilverStripe's Code conventions I don't know enough about the topic to rate
Robust and secure forms	Robust and secure forms Intermediate	Robust and secure forms Advanced	Robust and secure forms I don't know enough about the topic to rate
Converting a static site to SilverStripe templates	Converting a static site to SilverStripe templates Intermediate	Converting a static site to SilverStripe templates Advanced	Converting a static site to SilverStripe templates I don't know enough about the topic to rate
Dependancy Managment with Composer	Dependancy Managment with Composer Intermediate	Dependancy Managment with Composer Advanced	Dependancy Managment with Composer I don't know enough about the topic to rate
Using controller actions	Using controller actions Intermediate	Using controller actions Advanced	Using controller actions I don't know enough about the topic to rate
Setting up support for Behat	Setting up support for Behat Intermediate	Setting up support for Behat Advanced	Setting up support for Behat I don't know enough about the topic to rate
Writing configurable modules that are easily consumed and adopted by the community	Writing configurable modules that are easily consumed and adopted by the community Intermediate	Writing configurable modules that are easily consumed and adopted by the community Advanced	Writing configurable modules that are easily consumed and adopted by the community I don't know enough about the topic to rate
Must-have GridField modules	Must-have GridField modules Intermediate	Must-have GridField modules Advanced	Must-have GridField modules I don't know enough about the topic to rate
Environment management with _ss_environment et al	Environment management with _ss_environment et al Intermediate	Environment management with _ss_environment et al Advanced	Environment management with _ss_environment et al I don't know enough about the topic to rate
Introduction to Entwine	Introduction to Entwine Intermediate	Introduction to Entwine Advanced	Introduction to Entwine I don't know enough about the topic to rate
Building a RESTful API, introducing HTTP verbs, headers, working with request vars	Building a RESTful API, introducing HTTP verbs, headers, working with request vars Intermediate	Building a RESTful API, introducing HTTP verbs, headers, working with request vars Advanced	Building a RESTful API, introducing HTTP verbs, headers, working with request vars I don't know enough about the topic to rate