pg_dump運行rake db時出錯：migrate

Question

我有postgres容器和一個ruby容器。當運行搬運工，撰寫運行Web耙分貝：遷移我有這樣的錯誤

rake aborted! 
failed to execute: 
pg_dump -s -x -O -f /usr/src/app/db/structure.sql --schema=public --schema=partitioning docker_rails_dev 

Please check the output above for any errors and make sure that `pg_dump` is installed in your PATH and has proper permissions. 

/usr/local/bundle/gems/activerecord-4.2.7.1/lib/active_record/tasks/postgresql_database_tasks.rb:90:in `run_cmd' 
/usr/local/bundle/gems/activerecord-4.2.7.1/lib/active_record/tasks/postgresql_database_tasks.rb:55:in `structure_dump' 
/usr/local/bundle/gems/activerecord-4.2.7.1/lib/active_record/tasks/database_tasks.rb:183:in `structure_dump' 
/usr/local/bundle/gems/activerecord-4.2.7.1/lib/active_record/railties/databases.rake:279:in `block (3 levels) in <top (required)>' 
/usr/local/bundle/gems/activerecord-4.2.7.1/lib/active_record/railties/databases.rake:53:in `block (2 levels) in <top (required)>' 
/usr/local/bundle/gems/activerecord-4.2.7.1/lib/active_record/railties/databases.rake:45:in `block (2 levels) in <top (required)>' 
Tasks: TOP => db:structure:dump 
(See full trace by running task with --trace) 

的pg_dump的命令是在Postgres的容器可用，但不是在紅寶石容器，但我在docker-compose.yml文件聯繫在一起的他們。

Answer 1

簡答：安裝您需要的工具 - 插入容器，插入容器。

如果您需要在ruby容器內運行pg_dump，請在ruby容器中安裝postgress。二進制文件很少以這種方式移植。