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We have the `# frozen_string_literal: true` comment on all our
files. This means all string literals are frozen. There is no need
to call #freeze on any literals.
For files with `# frozen_string_literal: true`
```
puts %w{a b}[0].frozen?
=> true
puts "hi".frozen?
=> true
puts "a #{1} b".frozen?
=> true
puts ("a " + "b").frozen?
=> false
puts (-("a " + "b")).frozen?
=> true
```
For more details see: https://samsaffron.com/archive/2018/02/16/reducing-string-duplication-in-ruby
42 lines
926 B
Ruby
42 lines
926 B
Ruby
# frozen_string_literal: true
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class BadgePostsViewManager
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VIEW_NAME = "badge_posts"
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def self.create!
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sql = <<~SQL
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CREATE VIEW #{VIEW_NAME} AS
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SELECT p.*
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FROM posts p
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JOIN topics t ON t.id = p.topic_id
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JOIN categories c ON c.id = t.category_id
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WHERE c.allow_badges AND
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p.deleted_at IS NULL AND
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t.deleted_at IS NULL AND
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NOT c.read_restricted AND
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t.visible AND
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p.post_type IN (1,2,3)
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SQL
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DB.exec(sql)
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raise "Failed to create '#{VIEW_NAME}' view" unless badge_posts_view_exists?
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end
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def self.drop!
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DB.exec("DROP VIEW #{VIEW_NAME}")
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raise "Failed to drop '#{VIEW_NAME}' view" if badge_posts_view_exists?
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end
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def self.badge_posts_view_exists?
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sql = <<~SQL
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SELECT 1
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FROM pg_catalog.pg_views
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WHERE schemaname
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IN ('public')
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AND viewname = '#{VIEW_NAME}';
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SQL
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DB.exec(sql) == 1
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end
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end
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