default_scope and associations

Question

Suppose I have a Post model, and a Comment model. Using a common pattern, Post has_many Comments.

If Comment has a default_scope set:

default_scope w         


        

Answer 1

How about this?

# Use this scope by default
scope :active, -> { where(deleted_at: nil) }

# Use this whenever you want to include all comments regardless of their `deleted_at` value
scope :with_soft_deleted, -> { unscope(where: :deleted_at)

default_scope, -> { active }

post.comments would fire this query:

SELECT "comments".* FROM "comments" WHERE "comments"."deleted_at" IS NULL AND "comments"."post_id" = $1;

post.comments.with_soft_deleted would send this:

SELECT "comments".* FROM "comments" WHERE "comments"."post_id" = $1;