Question

desc "Takes a database dump from remote server"
  task :backup do
     invoke 'db:backup_name'
      on roles(:db) do

   run "mysqldump -u #{fetch(:db_username)} -p#{fetch(:db_password)} #{fetch(:db_database)} > #{shared_path}/db_backups/#{fetch(:backup_filename)}.sql"

     system('mkdir -p db_backups')
     download! "#{fetch(:backup_file)}", "db_backups/#{fetch(:backup_filename)}.sql"

     within release_path do
       execute :rm, "#{fetch(:backup_file)}"
     end

  end
end

我收到此错误：

wrong number of arguments (1 for 0)

在这一行：

run "mysqldump -u #{fetch(:db_username)} -p#{fetch(:db_password)} #{fetch(:db_database)} > #{shared_path}/db_backups/#{fetch(:backup_filename)}.sql"

如果我把它的内容放在远程服务器上运行 - 它工作正常。真的不确定为什么ruby会抛出这个错误。

Answer 1

请尝试使用backticks：

`mysqldump -u #{fetch(:db_username)} -p#{fetch(:db_password)} #{fetch(:db_database)} > #{shared_path}/db_backups/#{fetch(:backup_filename)}.sql`

运行capistrano（ruby）时参数数量错误（1表示0）

1 个答案: