How to use if updating on nested column in triggers

Active Record also allows you to pass in hash conditions which can increase the readability of your conditions syntax.

This makes for clearer readability if you have a large number of variable conditions.Solution to N 1 queries problem Active Record lets you specify in advance all the associations that are going to be loaded.This is possible by specifying the This will find the category with id 1 and eager load all of the associated articles, the associated articles' tags and comments, and every comment's guest association.Any subsequent conditions chained to the returned relation will continue generating empty relations.This is useful in scenarios where you need a chainable response to a method or a scope that could return zero results.

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