 
                            
                            
                            Ruby on Rails多套环境的MySQL数据库yml配置
                            
                         
                        
                    
                                        
                        
                            
                                 
                            
                            
                            Ruby gem 'pg' 报错:Gem::LoadError can't activate pg (~> 0.18), already activated pg-1.0.0. Make sure all dependencies are added to Gemfile.
                            
                         
                        
                    
                                        
                        
                            
                                 
                            
                            
                            Ruby on Rails多套环境的MySQL数据库yml配置
                            
                         
                        
                    
                                        
                        
                            
                                 
                            
                            
                            mac os下使用mysql2报错: rake aborted!
                            
                         
                        
                    
                                        
                        
                            
                                 
                            
                            
                            Ruby gem 'pg' 报错:Gem::LoadError can't activate pg (~> 0.18), already activated pg-1.0.0. Make sure all dependencies are added to Gemfile.