Brand new rails app, can't generate scaffold

Question

Although I\'m not an expert, I\'ve developed a few rails apps in-house to use for some relatively small/medium sized projects and haven\'t had any issues as similar to this

Answer 1

The error states that it can't find a version of sqlite3 ~> 1.3.6 so that is what your Gemfile should require:

gem 'sqlite3', '~> 1.3.6'

The more lenient definition of gem 'sqlite3', '~> 1.3', '>= 1.3.6' which will also allow 1.4 is only valid for the master branch of rails.

Edit

The 5-2-stable branch actually now also allows using sqlite 1.4 but the currently released 5.2.2 gem does not.

Update 2019-03-18

Now that rails 5.2.2.1 has been released, the correct and also easiest fix is to bump rails to that version, as it will restrict sqlite3 to 1.3.6:

# In Gemfile
gem 'rails', '~> 5.2.2.1'

Given the security fixes in that version, this should be done anyway.