Akbar Corat - Coret

Hi Everyone, I want to share on runinng rails c on staging or production, please follow me. 1. Enter to you path folder application on staging. 2. RAILS_ENV=staging bundle exec rails c I hope this article can help you guys.

The blue/white elephant logo of the PostgreSQL RDBMS in SVG format. (Photo credit: Wikipedia ) Hi Everyone, Currently I use PostgreSQL in my apps. When I starting query on PostgreSQL is difference with mysql. I often had error like this "ActiveRecord::StatementInvalid: PG::Error: ERROR:  column "tabulars.year" must appear in the GROUP BY clause or be used in an aggregate function LINE 1: SELECT year FROM "tabulars"  GROUP BY id". So I try to revised my query on below. For instance: 1. When I want to group by:     on MySql :     @tabulars = Tabular.search(params[:tabular]).joins(:user).group([:year, :user_id]).paginate(per_page: DEFAULT_PER_PAGE, page: params[:page])      on PostgreSql:      @tabulars = Tabular.search(params[:tabular]).select([:year, :user_id]).joins(:user).group([:year, :user_id]).paginate(per_page: DEFAULT_PER_PAGE, page: params[:page]) 2. On PostgreSql the select column is required on ...

Ruby on Rails logo (Photo credit: Wikipedia ) Hi Everyone, I had a errors can't convert ActiveSupport::HashWithIndifferentAccess into String. This errors because I wrong on determining params json. For example: 1. I had params: {:tabular => {"file"=>"data_tabular_Pemerintahan (Adm Pemerintahan, Aparatur Negara dan Adm Kepegawaian)_kecamatan Admin_2013.xls"}} 2. I call on my speadsheet:     def export       workbook = Spreadsheet.open(params[:tabular])     end 3. On above is not specified to parse parameter. So put this     def export       workbook = Spreadsheet.open(params[:tabular][:file])     end I hope this article can help you,

Ruby on Rails logo (Photo credit: Wikipedia ) Hi Everyone, Currently I want to share to you how to make export function without gem and I change/modify the filename. Please follow me below: 1. Add mime type on config/initializers/mime_types.rb     Mime::Type.register "application/xls", :xls 2. Add on your controller     def index       @tabulars = Tabular.all       filename = "data_users.xls"       respond_to do |format|         format.html         format.xls { headers["Content-Disposition"] = "attachment; filename=\"#{filename}\"" }       end     end 3. Add on your view:     <%= link_to "Export",  tabulars_path(format: "xls") %> 4, Add format index.xls.erb file:        <table>           <tr>              <th...

Hi Everyone, I will share to you about my experience when had error "Named scope 'to_depth' is only available when depth caching is enabled". Please try below: 1. Add new migration     - Migrate: add_column [tables], :ancestry_depth, :integer, :default => 0     - Build cache: TreeNode.rebuild_depth_cache! 2. Go to model     -  has_ancestry cache_depth: true I hope this article can help you. :)