错误迁移正在等待.要解决此问题，请运行:bin/rake db:迁移rails_env =开发

Question

我正在为Rails现有应用程序配置Docker，并且在运行Local Host时我的错误低于错误：3000。

迁移正在等待。要解决此问题，请运行：bin/rake db：migrate rails_env = development

如何设置耙子DB：在Docker中迁移 docker-compose yml文件

 version: '3'
volumes:  
postgres_data: {} 
services:
 redis:
  image: redis
 command: redis-server 
  ports:
  - "6379:6379"
app:    
 build:      
   context: .      
  dockerfile: /Users/admin/git/generic/deviceapp/docker/app/Dockerfile    
  depends_on:      
   - db  
db:    
image: postgres    
volumes:      
  - postgres_data:/var/lib/postgresql/data  
web:    
build:      
  context: .      
  dockerfile: /Users/admin/git/generic/deviceapp/docker/web/Dockerfile    
depends_on:      
  - app    
ports:      
  - 80:80

数据库yml文件

development:
adapter: postgresql
encoding: unicode
database: Myapp
pool: 5
username: san
password: test@123
host: db

dockerfile

FROM ruby:2.5.0
ENV RAILS_ROOT /Users/admin/git/generic/Myapplication
ENV REDIS_URL=redis://redis:6379/0
RUN mkdir -p $RAILS_ROOT 
# Set working directory
WORKDIR $RAILS_ROOT
# Setting env up
ENV RAILS_ENV='development'
ENV RACK_ENV='development'
# Adding gems
COPY Gemfile Gemfile
COPY Gemfile.lock Gemfile.lock
RUN bundle install
# Adding project files
COPY . .
RUN gem install bundler
RUN bundle install
COPY . .
EXPOSE 3000
CMD ["bundle", "exec", "puma", "-C", "config/puma.rb", "development", "- 
 b", "tcp://0.0.0.0:3000"] 

Answer 1

干草，就我而言，我解决了这个问题，告诉docker在 docker-compose.yml中执行一些bash命令。喜欢：

在您的Docker-Compose中：

# your_app_path/docker-compose.yml
...
web:
  build: 
  ...
  command: bash -c "build-scripts/container/web"
...

当您的Docker'UPS'时，build-scripts/container/web将被执行。

您的Dockerfile，将在docker-compose build上调用，您不应在此文件中执行命令。

创建build-scripts/container/web，其中此内容：

#!/bin/bash
bundle check || bundle install
bundle exec rake db:setup && 
bundle exec rails s -p 3000 -b '0.0.0.0' -P /tmp/rails.pid

您可以选择将rake db:setup交换为rake db:migrate或类似的东西。