recently read railstutorial . the model generated through rails g model User name:string email:string has gradually become the following virtues with the tutorials: class User < ApplicationRecord before_save { self.email = email.downcase } v...

Environment: rails webpacker: vue + vuex + vue-router + iview problem: change the state value through mutation, and through the vue browser debugging tool, you can see that mutation triggers normally, but the variable for computed to get the correspond...

this is a comment page of a school curriculum grading system. I want to do this: 1. Count the number of words in each comment 2. When the whole loop is over, count out the total number of words of all comments < div id= "header " > < H1 > Course R...

for example, there is a form like this: <input type="text" name="user[name]" value="bob"> is parsed into the following format in rails params { user: { name: "bob" } } so there are two questions I ...

rails polymorphism problem: I now have questions , articles , comments three models, one question corresponds to multiple comments , and a article corresponds to multiple comments . Now how to submit comments under question ? my model...

-- binary= usr bin firefox -- port=4444 http: 127.0.0.1:4444 session < H1 > < Net::HTTPInternalServerError:0x00000001865438 > < H1 > var lib gems 2.3.0 gems selenium-webdriver-3.13.0 lib selenium webdriver remote response.rb:69:in `assert_ok : P...

Server configuration: 4core 8G there are several nginx+rails+mongodb+redis+sidekiq services. where rails starts 2 worker, and one worker10 thread sidekiq concurrency is set to 15 how should I optimize or upgrade the server? ...

I have looked up the relevant topics about the launch of rails on the website, and they are all blurred. Can you tell me the relevant settings of nginx? is there any module that needs to be compiled in nginx? I know that apache has mod_ruby and eruby, ...

I wanted to run my project with shell, so I wrote a script shell, following the online example, but it didn t seem to work. Ask the boss to give some instructions. When I was running, command stopped at the first command, elasticsearch, did not continu...

when using ruby on rails, I often see Rails.env.development? Rails.env.production? Such an expression. Print Rails.env, directly to get development s answer. I looked all over the configuration file, but I don t know where it was configured. Is it the...

problem description Why do you say undefined method here the environmental background of the problems and what methods you have tried related codes Please paste the code text below (do not replace the code with pictures) .parameters-area ....

it says here that I don t define that the method, problem lies in the app views model show.html.haml file. I tried to find out what s wrong with the def show in controller, but I didn t find anything wrong. related codes Please paste the co...

my environment is: I would like to ask you, how to set up, how to do? Thank you very much. ...

this is my ruby and rails versions require test_helper class SayControllerTest < ActionDispatch::IntegrationTest test "should get hello" do get say_hello_url assert_response :success end test "should say hello in ...