What is require in Gemfile?

This means install the gem, but do not call require when you start Bundler. So you will need to manually call require “whenever” if you want to use the library. If you were to do gem “whenever”, require: “whereever” then bundler would download the gem named whenever, but would call require “whereever”

How do I get Gemfile?

A gemfile is automatically created when you start a new rails application. type rails new appName and then it will be generated automatically. It will also be populated with some gems.

Should I commit Gemfile lock?

Assuming you’re not writing a rubygem, Gemfile. lock should be in your repository. It’s used as a snapshot of all your required gems and their dependencies. This way bundler doesn’t have to recalculate all the gem dependencies each time you deploy, etc.

What is source in Gemfile?

Gemfiles require at least one gem source, in the form of the URL for a RubyGems server. Although it’s not recommended, it’s possible as of Bundler 1.7, to add multiple global source lines. Each of these sources has to be a valid Rubygems repository.

How do I change Gemfile?

Go to the root of your application, and look for Gemfile. The root of the application is where you run rails server from, in case you were wondering 🙂 Open Gemfile using your favorite text editor, and try changing the rubygems source from HTTP to HTTPS.

Can I edit Gemfile lock?

Since the second time of bundle install execution, dependencies are loaded from Gemfile. lock as long as Gemfile isn’t changed.

How do you update gems in Gemfile?

Update the gems specified (all gems, if none are specified), ignoring the previously installed gems specified in the Gemfile. lock . In general, you should use bundle install(1) to install the same exact gems and versions across machines. You would use bundle update to explicitly update the version of a gem.

Where is the Gemfile lock?

lock file. After running the bundle install command, ‘Gemfile. lock’ is created in the working directory.

What is application Gemfile?

A Gemfile is a file which consists of all the gems that is needed for your application. The first step is to run bundle init command on the terminal. Run bundle install to install all the gems included in the gemfile. This generates a Gemfile. lock, as the name suggests Gemfile.

What’s a Gemfile?

A Gemfile describes the gem dependencies required to execute associated Ruby code. Place the Gemfile in the root of the directory containing the associated code. For instance, in a Rails application, place the Gemfile in the same directory as the Rakefile .

How does active model work in Ruby on rails?

The module defines the model_name class method which will define a number of accessors using some ActiveSupport::Inflector methods. ActiveModel::Model adds the ability for a class to work with Action Pack and Action View right out of the box.

What does active model dirty do in Ruby?

ActiveModel::Dirty gives the ability to check whether an object has been changed or not. It also has attribute based accessor methods. Let’s consider a Person class with attributes first_name and last_name:

How to serialize an object in active model?

You need to declare an attributes Hash which contains the attributes you want to serialize. Attributes must be strings, not symbols. Now you can access a serialized Hash of your object using the serializable_hash method. Active Model also provides the ActiveModel::Serializers::JSON module for JSON serializing / deserializing.

What do you need to know about active model?

ActiveModel::SecurePassword provides a way to securely store any password in an encrypted form. When you include this module, a has_secure_password class method is provided which defines a password accessor with certain validations on it by default.