rails-tricks.md

   1 ---
   2 title: Rails tricks
   3 category: Rails
   4 ---
   5
   6 in config/environments/development.rb:
   7
   8     # Source maps for Sass
   9     config.sass.debug_info = true
  10     config.sass.line_comments = false
  11
  12     # Don't break apart
  13     config.assets.debug = false
  14
  15 Partial locals
  16
  17     <%= render 'article', full: true %>
  18     <%= render 'article' %>
  19
  20     <% if local_assigns[:full] %>
  21       ...
  22     <% end %>
  23
  24 HTML in i18n
  25
  26     en:
  27       read_more_html: "read <b>more</b>..."
  28
  29 Exception handling:
  30
  31     # config/application.rb
  32     config.exceptions_app = self.routes
  33
  34     get '/404', to: 'errors#not_found'
  35     get '/500', to: 'errors#server_error'
  36
  37     class ErrorsController
  38       def not_found
  39         render status: :not_found
  40       end
  41      end
  42
  43 Rails updating:
  44
  45     rake rails:update
  46
  47 Distinct pluck:
  48
  49     Article.distinct.pluck('author')
  50
  51 Relation#merge
  52
  53     scope :with_drafts, -> {
  54       uniq.joins(:articles).merge(Article.draft)
  55     }
  56
  57 Order
  58
  59     scope :recent, -> { order created_at: :desc }
  60
  61 Group by month
  62
  63     .group("to_char(created_at, 'YYYY-MM')")
  64     .group("to_char(created_at, 'YYYY-MM')").count