ruby-on-rails-5

问题 A user has many uploads. I want to add a column to the uploads table that references the user. What should the migration look like? Related question for Rails 3: Rails 3 migrations: Adding reference column? Related question for Rails 4: Add a reference column migration in Rails 4 回答1: As with prior versions of Rails, you may use the following command to create the migration: rails g migration AddUserToUploads user:references Unlike prior versions of Rails, the migration looks like: class

问题 I am a Rails beginner and i see some issue while deploying to Heroku. Earlier i used SQLite3, later when i understood that i needed postgresql i installed the same and work on local machine. One deployment went fine after migrating from sqlite to postgresql. Now i see some issue. Heroku logs, Gem file and Database.yml details are as below. Can some one help me in this please. Advance Thanks...!!! Part of Gem file: group :development, :test do gem 'pg', '~> 1.0.0' gem 'rails_12factor' #gem

问题 I am a Rails beginner and i see some issue while deploying to Heroku. Earlier i used SQLite3, later when i understood that i needed postgresql i installed the same and work on local machine. One deployment went fine after migrating from sqlite to postgresql. Now i see some issue. Heroku logs, Gem file and Database.yml details are as below. Can some one help me in this please. Advance Thanks...!!! Part of Gem file: group :development, :test do gem 'pg', '~> 1.0.0' gem 'rails_12factor' #gem

问题 I am implementing outlook signup/signin in my Rails app for authentication from scratch without using Devise or another library or gem. I have followed the official microsoft blog For integrating outlook signin in Rails app But I am failing to implement the final step and it shows-> I have understood the problem , that the storing size of token exceeds the available cookie size I have successfully done all of the steps just When I try to store the token, it gives error class AuthController <

问题 I am implementing outlook signup/signin in my Rails app for authentication from scratch without using Devise or another library or gem. I have followed the official microsoft blog For integrating outlook signin in Rails app But I am failing to implement the final step and it shows-> I have understood the problem , that the storing size of token exceeds the available cookie size I have successfully done all of the steps just When I try to store the token, it gives error class AuthController <

问题 This is my NotificationChannel class NotificationChannel < ApplicationCable::Channel def subscribed stream_from "notification_user_#{user.id}" end def unsubscribed stop_all_streams end end How can I write test for this ActionCable channels This is my Rspec require 'rails_helper' require_relative 'stubs/test_connection' RSpec.describe NotificationChannel, type: :channel do before do @user = create(:user) @connection = TestConnection.new(@user) @channel = NotificationChannel.new @connection, {}

问题 The bounty expires in 5 days . Answers to this question are eligible for a +100 reputation bounty. simo is looking for an answer from a reputable source : “I tried every thing I can, but nothing worked..” I am using rails 5.2.4.1, and I am wondering why I get this error when I try to access the API endpoint: ActionView::MissingTemplate (Missing template api/schools/classrooms , application/classrooms with {:locale=>[:en], :formats=>[:json], :variants=>[], :handlers=>[:raw, :erb, :html,

问题 I have a few belongs_to migrations created&migrated but I see now that in Rails 5, the default behavior is required: true which I do not want. My question is that how can I write a simple migration to convert that to optional: true ? Can't find this particular solution anywhere. 回答1: You can use the change_column_null method for that: def change change_column_null :table, :column, true end change_column_null is reversible, if you need to rollback the value will be false (or true depending on

问题 I have a few belongs_to migrations created&migrated but I see now that in Rails 5, the default behavior is required: true which I do not want. My question is that how can I write a simple migration to convert that to optional: true ? Can't find this particular solution anywhere. 回答1: You can use the change_column_null method for that: def change change_column_null :table, :column, true end change_column_null is reversible, if you need to rollback the value will be false (or true depending on

问题 I'm trying to add oauth2 with Google, following these instructions. I'm receiving the following error message starting the server: Exiting You've tried to invoke Spring when it's already loaded (i.e. the Spring constant is defined). This is probably because you generated binstubs with Spring 1.0, and you now have a Spring version > 1.0 on your system. To solve this, upgrade your bundle to the latest Spring version and then run `bundle exec spring binstub --all` to regenerate your binstubs.