Background
I'm developing a React Native app for the first time. I've gotten to the point where I need to start working on the back end and I'm going to use Ruby on Rails to do that. I've installed Ruby and SQLite3, and I've successfully added Ruby to my project.
Problem
As of right now, when I try to install bcrypt and jwt to the Gemfile in the project, I ran gem install bcrypt/jwt and that seemed to work, but when I try to run bundle i get an error: "Could not locate Gemfile". I am certain the Gemfile is in the directory I'm running the commands in, as I can see it in VS Code and also going down the path in C:/, etc.
Question
Can I actually add Ruby on Rails to an existing project? What could be the cause of this issue?
Thanks a lot!
If you have created a new Rails-App via rails new myapp you can cd into this directory and call bundle install.
rails new myApp && cd myApp && bund
Please check that you are in the correct directory. If you are sure that you are in the right directory then check your current rails version with rails --version.
Make sure you are in the project directory before running bundle install. For example, after running rails new myproject, you will want to cd myproject before running bundle install.
gem install - like npm install -g, programm to fetch gems,
bundle is fetching list of gems from Gemfile in your app(current folder), like package.json (not sure about naming)
1. Can I actually add Ruby on Rails to an existing project?
Yes, sure. You have a lot of variation to do that
here link the good article how create rails-react app, then you can move your front end part to react folder in the new rails application.
you can create new rails as separated application, in folder what you want as API with option rails new your_app_name --api, then send requests from react app directly to rails app port or IP(it is harder to implement, but I think it is right solution).
2. What could be the cause of this issue?
it is possible because you do not have rails app do not exist
you do not have Gemfile in your folder.
Related
I am trying to learn ruby on rails. I created a new project with Rails 6.1.2.1 for this purpose but it took more than 5 minutes. The problem is after creating the project, it creates a huge 100Mb+ dir which is called node_modules with every possible node_package. This does not make sense as the default behavior. Am I actually missing something?
The node_modules are for your front-end stuff. Now Ruby on Rails supports webpacker with all goodies of NodeJS. It is already in .gitignore and it is normal behavior.
When you want to save your project, you can delete this folder and whenever you need you can use yarn install to get it back.
You can create rails app without installing webpacker
--skip-webpack-install option of Rails new. It still includes the webpackergem in the Gemfile and sets up the resulting project with webpacker configuration (only rails webpacker:install is not run).
I have just set up ruby and rails on a freshly installed freeBSD. It works great. I can do rails new blabla mv into blabla and do rails s and it just works.
I had an up and running rails app on another computer. I copied the repertory that contained the app to the new computer running freeBSD. However, when I mv into that repertory of the rails app and to rails server I get -bash: rails: command not found
I have tried creating a new app with the same name and let rails create all the repertories and then copy the files of the existing rails app therein but no success.
I can run rails -v and rails s from within any repertory and get correct answer, but when I move into that specific repertory I get that command not found.
You're probably using a ruby version manager I suspect (rbenv/rvm)? Check the ruby version in your Gemfile (top of the file). It probably isn't the same as the ruby version you have installed. If you're using one of the above mentioned version managers than install the correct ruby for your rails project. After that you can do a gem install bundler in the project directory and after run bundle install which will install rails and all dependencies.
Which version you are using? It happens with earlier versions. Try updating your gems and bundler. And try again. Hope it helps.
Did you try running bin/rails s? I think tha you need run bundle install too.
I am on Rails 4.0.0
So, I have created a new app in a new directory: rails new lpd.
I have cd' into the new lpd directory.
bundle install gives me Bundler::GemFileNotFound.
rails s does not start the server.
I cd in to another project that has a Gemfile installed, do a bundle install, that works fine and the rails server starts fine.
I cd back into my new project directory lpd and hit rails s again, no luck.
still GemFileNotFound.
There is no Gemfile in the project directory.
You can:
A. Create one yourself using a Rails 4.0 Gemfile as a template.
B. Copy one over from another Rails 4.0 project.
C. Run rails new again to recreate the project files (be careful to backup any changes you have already made such as configuration changes).
So here's my problem:
I have a project and I am trying to install Gems locally to that project. For example if I install devise from the Gemfile and then run a bundle install it won't put any of the controllers in the controllers directory of the project. Instead I have to hunt through the RVM directories to get that particular gem's controllers, copy them to my project and then start writing my project from there.
Any suggestions?
I think the comment above answered your question - when you add a gem like Devise to your app, it doesn't generally drop code directly into your application. Sometimes it provides a generator which will install some parts of it, but mostly it alters config files so that the code in the gem gets pulled into your app when it starts.
You can ask bundler to install gems in the "vendor" subdirectory of your app, instead of in the main RVM/Ruby location, with the --path option. But you usually only want to do that for production deployment, not development.
I've been given an existing rails project that I am trying to play around with. however, when I try to run bundle install or rake db:migrate, I run into problems so essentially, i can't really do anything with the code I've been given.
The biggest problem as I see it right now is the fact that it can't locate my gemfile when I bundle install?
How can I find my gemfile.. is there supposed to be one in the root folder of the application?
Is there another step I need to take to initialize an existing project that someone has just copied and pasted to me? Thanks!
Yes, you should have a Gemfile in the root directory of your app.
If you are developing in a Rails 2 app, you might want to check out the Bundler.io page about Rails 2.3:
http://bundler.io/v1.7/rails23.html
If you are using Rails 3+ you can take a learn from Bundler's page on Rails 3 use:
http://bundler.io/v1.7/rails3.html
If you just need to get started with a Gemfile, go to a different directory and generate a dummy app:
$ rails new temporary-app
Copy over the Gemfile to your directory. It will only have the default gems listed, but you may be able to "discover" your needed gems as you go. If you happen to have a Gemfile.lock file then you can see the gems that you need at the top of the dependency tree.