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app/controllers/application_controller.rb

Summary

Maintainability
A
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Useless assignment to variable - user_id.
Open

      user_id = current_user.id
Severity: Minor
Found in app/controllers/application_controller.rb by rubocop

This cop checks for every useless assignment to local variable in every scope. The basic idea for this cop was from the warning of ruby -cw:

assigned but unused variable - foo

Currently this cop has advanced logic that detects unreferenced reassignments and properly handles varied cases such as branch, loop, rescue, ensure, etc.

Example:

# bad

def some_method
  some_var = 1
  do_something
end

Example:

# good

def some_method
  some_var = 1
  do_something(some_var)
end

Unused method argument - resource. If it's necessary, use _ or _resource as an argument name to indicate that it won't be used. You can also write as after_sign_in_path_for(*) if you want the method to accept any arguments but don't care about them.
Open

  def after_sign_in_path_for(resource)
Severity: Minor
Found in app/controllers/application_controller.rb by rubocop

This cop checks for unused method arguments.

Example:

# bad

def some_method(used, unused, _unused_but_allowed)
  puts used
end

Example:

# good

def some_method(used, _unused, _unused_but_allowed)
  puts used
end

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