Rails 小技巧cheatsheet

RUBY
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# Source maps for Sass
config.sass.debug_info = true
config.sass.line_comments = false
# Don't break apart
config.assets.debug = false

RUBY
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<%= render 'article', full: true %>
<%= render 'article' %>
<% if local_assigns[:full] %>
  ...
<% end %>

YML
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en:
  read_more_html: "read <b>more</b>..."

RUBY
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# config/application.rb
config.exceptions_app = self.routes
get '/404', to: 'errors#not_found'
get '/500', to: 'errors#server_error'
class ErrorsController
  def not_found
    render status: :not_found
  end
end

SHELL
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rake rails:update

RUBY
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Article.distinct.pluck('author')

RUBY
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scope :with_drafts, -> {
  uniq.joins(:articles).merge(Article.draft)
}

RUBY
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scope :recent, -> { order created_at: :desc }

RUBY
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.group("to_char(created_at, 'YYYY-MM')")
.group("to_char(created_at, 'YYYY-MM')").count