gem install mimemagic -v '0.3.10' --source 'https://rubygems.org/' Building native extensions. This could take a while... ERROR: Error installing mimemagic: ERROR: Failed to build gem native extension. Solution brew install shared-mime-info...

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Error installing mimemagic. Error: Failed to build g...

> User.reflect_on_all_associations.map(&:name) > [:addresses, :cookies, :posts]

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Fetch names of associated ActiveRecord models in Rub...

Error on installing mailcatcher The command: gem install mailcatcher fails with error: - ERROR: Error installing mailcatcher: ERROR: Failed to build gem native extension make "DESTDIR=" compiling parser.c parser.rl:112:17: warnin...

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Error installing mailcatcher

Error on installing mailcatcher The command: gem install mailcatcher fails with error: - ERROR: Error installing mailcatcher: ERROR: Failed to build gem native extension Solution gem install mailcatcher -- --with-cflags="-Wn...

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Error installing mailcatcher

Suppose you want to remove a 'comments' table from a blog application. You can do so by performing the following tasks from the command line (e.g., Terminal). Step one: $ rails console Step two: $ ActiveRecord::Migration.drop_table(:c...

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Delete table

Issue 1 - Error in installing pg gem Installing pg 0.19.0 with native extensions Gem::Ext::BuildError: ERROR: Failed to build gem native extension. current directory: /home/luke/.rvm/gems/ruby-2.4.1/gems/pg-0.19.0/ext /home/luke/.rvm/rub...

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Common Ruby on Rails gem installation errors

When you change any of your javascripts or stylesheets in the production environment, you need to run rake assets:precompile; this task compiles and compresses the various .js and .css files and creates the application.js and application.css files...

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Clear the cache from the Rails asset pipeline

Introduction Often when developing apps with Rails you need to set up environment variables to keep sensitive information secure in your code. This article looks at how to set up environment config variables in Rails. We’ll look at why we need to...

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Managing Environment Configuration Variables in Rails

In your application controller file app/controllers/application_controller.rb include the following private method: class ApplicationController < ActionController::Base private # Overwriting the sign_out redirect path method de...

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Change the redirect path after signing out: Rails us...

A scaffold in Rails is a full set of model, database migration for that model, controller to manipulate it, views to view and manipulate the data, and a test suite for each of the above. To generate a scaffold for a blog use the rails gener...

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Scaffolding in Rails