When I execute the command Date.today in my rails command, I get the following error:
I can't do a simple Date.today in my Rails console
ruby-1.9.2-p180 :026 > >> require 'date'
=> false
ruby-1.9.2-p180 :027 > >> Date.today
ArgumentError: invalid date
from /Users/besi/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/date.rb:809:in `civil'
from /Users/besi/.rvm/rubies/ruby-1.9.2-p180/lib/ruby/1.9.1/Date.rb:1810:in `today'
from (irb):27
from /Users/besi/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.2.11/lib/rails/commands/console.rb:47:in `start'
from /Users/besi/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.2.11/lib/rails/commands/console.rb:8:in `start'
from /Users/besi/.rvm/gems/ruby-1.9.2-p180/gems/railties-3.2.11/lib/rails/commands.rb:41:in `<top (required)>'
from /Users/besi/Dropbox/projects/Freelance/vidis/VidiServer/script/rails:6:in `require'
from /Users/besi/Dropbox/projects/Freelance/vidis/VidiServer/script/rails:6:in `<top (required)>'
from -e:1:in `load'
from -e:1:in `<main>'
In the irb console this works without problems:
ruby-1.9.2-p180 :001 > require 'date'
=> true
ruby-1.9.2-p180 :002 > Date.today
=> #<Date: 2013-04-15 (4912795/2,0,2299161)>
It looks like there is a problem with the RubyMine Plugin here. When I do the same thing in the console it works. I don't know though why such a simple thing should not work in RubyMine.
Related
I have a question with Ruby on Rails using:
rails console --sandbox
So in Michael Hartl's rails tutorial 3rd edition we are using this and I have a problem when sometimes I'm using it and it all goes well and then I have an error, and literally the whole test environment becomes useless in that it will not respond to my commands
For example, I will type:
2.1.1 :025 > user.first
or any other command that was working and should be working and instead get:
NoMethodError: undefined method `first' for #<User:0x007fede35e3188>
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/activemodel-4.2.0.beta2/lib/active_model/attribute_methods.rb:435:in `method_missing' from (irb):25
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2 gems/railties-4.2.0.beta2/lib/rails/commands/console.rb:110:in `start'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2 gems/railties-4.2.0.beta2/lib/rails/commands/console.rb:9:in `start'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/railties-4.2.0.beta2/lib/rails/commands/commands_tasks.rb:68:in `console'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/railties-4.2.0.beta2/lib/rails/commands/commands_tasks.rb:39:in `run_command!'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/railties-4.2.0.beta2/lib/rails/commands.rb:17:in `<top (required)>'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/activesupport-4.2.0.beta2/lib/active_support/dependencies.rb:248:in `require'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/activesupport-4.2.0.beta2/lib/active_support/dependencies.rb:248:in `block in require'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/activesupport-4.2.0.beta2/lib/active_support/dependencies.rb:233:in `load_dependency'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/activesupport-4.2.0.beta2/lib/active_support/dependencies.rb:248:in `require'
from /Users/andrewkim/workspace2/sample_app/bin/rails:8:in `<top (required)>'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/activesupport-4.2.0.beta2/lib/active_support/dependencies.rb:242:in `load'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/activesupport-4.2.0.beta2/lib/active_support/dependencies.rb:242:in `block in load'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/activesupport-4.2.0.beta2/lib/active_support/dependencies.rb:233:in `load_dependency'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/activesupport-4.2.0.beta2/lib/active_support/dependencies.rb:242:in `load'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/spring-1.1.3/lib/spring/commands/rails.rb:6:in `call'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/spring-1.1.3/lib/spring/command_wrapper.rb:38:in `call'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/spring-1.1.3/lib/spring/application.rb:180:in `block in serve'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/spring-1.1.3/lib/spring/application.rb:153:in `fork'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/spring-1.1.3/lib/spring/application.rb:153:in `serve'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/spring-1.1.3/lib/spring/application.rb:128:in `block in run'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/spring-1.1.3/lib/spring/application.rb:122:in `loop'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/spring-1.1.3/lib/spring/application.rb:122:in `run'
from /Users/andrewkim/.rvm/gems/ruby-2.1.1#railstutorial_rails_4.2.0.beta2/gems/spring-1.1.3/lib/spring/application/boot.rb:18:in `<top (required)>'
from /Users/andrewkim/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from /Users/andrewkim/.rvm/rubies/ruby-2.1.1/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
from -e:1:in `<main>'2.1.1 :026 >
All of a sudden anything I type in terminal will come with an error like this, and I don't know how to go back without exiting "rails console --sandbox". is there a way?
for example, I will type:
2.1.1 :025 > user.first
or any other command that was working and should be working
That command shouldn't work, and it doesn't work. You are getting an error because in the tutorial a User instance, which represents one row in your table, e.g.
user = User.new(name: "Joe", email: "joe#yahoo.com")
does not have a method named first(). Instead, a user instance has the methods:
id()
name()
email()
created_at()
updated_at()
However, the class name(or model name) can be used to search the table, e.g.
user1 = User.first. #User is the name of the class/model
As for this:
and I don't know how to go back
Go back to what? Nothing has changed. All the variables you typed into the console before that error will still exist. Here is an example from the rails console:
$ rails console --sandbox
Loading development environment in sandbox (Rails 4.0.8)
Any modifications you make will be rolled back on exit
2.0.0-p481 :001 > x = 10
=> 10
2.0.0-p481 :002 > user = User.find_by(email: "example#railstutorial.org")
User Load (4.0ms) SELECT "users".* FROM "users" WHERE "users"."email" = 'example#railstutorial.org' LIMIT 1
=> #<User id: 2, name: "Example User", email: "example#railstutorial.org", created_at: "2014-10-02 01:39:04", updated_at: "2014-10-02 01:39:04", password_digest: "$2a$10$VNzivk5opu1AC5DOM467dO2JaTg3c3JC9OAXR0AqvEi0...">
2.0.0-p481 :003 > user.first
NoMethodError: undefined method `first' for #<User:0x00000100f360c8>
from /Users/7stud/.rvm/gems/ruby-2.0.0-p481#sample_app2_gems/gems/activemodel-4.0.8/lib/active_model/attribute_methods.rb:439:in `method_missing'
from /Users/7stud/.rvm/gems/ruby-2.0.0-p481#sample_app2_gems/gems/activerecord-4.0.8/lib/active_record/attribute_methods.rb:168:in `method_missing'
from (irb):3
from /Users/7stud/.rvm/gems/ruby-2.0.0-p481#sample_app2_gems/gems/railties-4.0.8/lib/rails/commands/console.rb:90:in `start'
from /Users/7stud/.rvm/gems/ruby-2.0.0-p481#sample_app2_gems/gems/railties-4.0.8/lib/rails/commands/console.rb:9:in `start'
from /Users/7stud/.rvm/gems/ruby-2.0.0-p481#sample_app2_gems/gems/railties-4.0.8/lib/rails/commands.rb:62:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
2.0.0-p481 :004 > user
=> #<User id: 2, name: "Example User", email: "example#railstutorial.org", created_at: "2014-10-02 01:39:04", updated_at: "2014-10-02 01:39:04", password_digest: "$2a$10$VNzivk5opu1AC5DOM467dO2JaTg3c3JC9OAXR0AqvEi0...">
2.0.0-p481 :005 > x
=> 10
2.0.0-p481 :006 >
See? Everything is still there. On the other hand, if by "go back" you mean, "go back to the blissful state you were in when you got no errors", then the solution is to type the correct commands into the console. Next time, copy the command from the tutorial that you are trying to emulate and paste it into a blank text file, then copy the command that is giving you an error(but which you know is correct!) and paste it under the command from the tutorial:
User.first
user.first
Then compare them. Your problem can also be mitigated somewhat by never creating a variable that has the same name as your model, e.g. instead of writing:
user = User.new(...)
write:
my_user = User.new(...)
Then if you write:
user.first
You will get the error:
NameError: undefined local variable or method `user' for main:Object
which should be easier for you to debug.
I'm new to ruby and tried following what this tutorial (http://www.youtube.com/watch?v=-GQmC-8k09c) said but I'm having problem with the console. I'm running a linuxmint 17 and this are my specs
Ruby version 2.1.2-p95 (x86_64-linux)
RubyGems version 2.2.2
Rack version 1.5
Rails version 4.1.1
JavaScript Runtime Node.js (V8)
I have tried :
spring stop
bundle install
whenever I run rails c this happens:
Loading development environment (Rails 4.1.1)
load error: /home/hanwai/.rvm/rubies/ruby-2.1.2/.irbrc
NoMethodError: undefined method `split' for nil:NilClass
/home/hanwai/.rvm/scripts/irbrc.rb:45:in `<top (required)>'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247:in `require'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247:in `block in require'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:232:in `load_dependency'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247:in `require'
/home/hanwai/.rvm/rubies/ruby-2.1.2/.irbrc:11:in `<top (required)>'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:241:in `load'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:241:in `block in load'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:232:in `load_dependency'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:241:in `load'
/home/hanwai/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/irb/init.rb:236:in `run_config'
/home/hanwai/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/irb/init.rb:19:in `setup'
/home/hanwai/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/irb.rb:380:in `start'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands/console.rb:90:in `start'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands/console.rb:9:in `start'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands/commands_tasks.rb:69:in `console'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands/commands_tasks.rb:40:in `run_command!'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/railties-4.1.1/lib/rails/commands.rb:17:in `<top (required)>'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247:in `require'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247:in `block in require'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:232:in `load_dependency'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:247:in `require'
/home/hanwai/rails/blog/bin/rails:8:in `<top (required)>'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:241:in `load'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:241:in `block in load'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:232:in `load_dependency'
/home/hanwai/.rvm/gems/ruby-2.1.2/gems/activesupport-4.1.1/lib/active_support/dependencies.rb:241:in `load'
/home/hanwai/.rvm/rubies/ruby-2.1.2/lib/ruby/2.1.0/rubygems/core_ext/kernel_require.rb:55:in `require'
irb(main):001:0>
this is my irbrc.rb file
# This is the common irbrc file used by all rvm ruby installations.
# This file will be overriden every time you update rvm.
# Turn on completion.
begin
require "readline"
require "irb/completion" rescue nil
# Turn on history saving.
# require "irb/ext/save-history"
# IRB.conf[:HISTORY_FILE] = File.join(ENV["HOME"], ".irb-history")
# Use an alternate way to on history saving until save-history is fixed.
#
# bug: http://redmine.ruby-lang.org/issues/show/1556
# patch: http://pastie.org/513500
#
# This technique was adopted from /etc/irbrc on OS X.
histfile = File.expand_path(".irb-history", ENV["HOME"])
if File.exist?(histfile)
lines = IO.readlines(histfile).collect { |line| line.chomp }
Readline::HISTORY.push(*lines)
end
Kernel::at_exit do
maxhistsize = 100
histfile = File::expand_path(".irb-history", ENV["HOME"])
lines = Readline::HISTORY.to_a.reverse.uniq.reverse
lines = lines[-maxhistsize, maxhistsize] if lines.compact.length > maxhistsize
File::open(histfile, "w+") { |io| io.puts lines.join("\n") }
end
rescue LoadError
puts "Readline was unable to be required, if you need completion or history install readline then reinstall the ruby.\nYou may follow 'rvm notes' for dependencies and/or read the docs page https://rvm.io/packages/readline/ . Be sure you 'rvm remove X ; rvm install X' to re-compile your ruby with readline support after obtaining the readline libraries."
end
# Calculate the ruby string.
rvm_ruby_string = ENV["rvm_ruby_string"] ||
(
ENV['GEM_HOME'] &&
path = ( File.realpath(ENV['GEM_HOME'].to_s) rescue nil ) &&
( path = $1 if path =~ /(.+)\/$/ ; true ) &&
path.split(/\//).last.split(/#/).first
) ||
("#{RUBY_VERSION}-p#{RUBY_PATCHLEVEL}" rescue nil) ||
(RUBY_DESCRIPTION.split(" ")[1].sub('p', '-p') rescue nil ) ||
(`ruby -v` || '').split(" ")[1].sub('p', '-p')
# cut ruby- ... everyone knows it's ruby
rvm_ruby_string = $1 if rvm_ruby_string =~ /^ruby[- ](.*)/
# Set up the prompt to be RVM specific.
#prompt = {
:PROMPT_I => "#{rvm_ruby_string} :%03n > ", # default prompt
:PROMPT_S => "#{rvm_ruby_string} :%03n%l> ", # known continuation
:PROMPT_C => "#{rvm_ruby_string} :%03n > ",
:PROMPT_N => "#{rvm_ruby_string} :%03n?> ", # unknown continuation
:RETURN => " => %s \n",
:AUTO_INDENT => true
}
IRB.conf[:PROMPT] ||= {}
IRB.conf[:PROMPT][:RVM] = #prompt
IRB.conf[:PROMPT_MODE] = :RVM if IRB.conf[:PROMPT_MODE] == :DEFAULT
# Load the user's irbrc file, if possible.
# Report any errors that occur.
begin
load File.join(ENV["HOME"], ".irbrc") if File.exist?("#{ENV["HOME"]}/.irbrc")
rescue LoadError => load_error
puts load_error
rescue => exception
puts "Error : 'load #{ENV["HOME"]}/.irbrc' : #{exception.message}"
end
any advices?
You can try with the command irb (which is a Ruby command-line interpreter too) instead of rails c, it can be enough.
If not, see this solution which is near your problem.
Hope this help !
I'm working on a ruby on rails tutorial and using the rails console
When an error occurs I'm seeing a lot more error information than the tutorial shows (could be that they ommited it for brevity)
For example:
2.1.1 :001 > asdf
NameError: undefined local variable or method `asdf' for main:Object
from (irb):1
from /Users/me/.rvm/gems/ruby-2.1.1#global/gems/railties-4.0.4/lib/rails/commands/console.rb:90:in `start'
from /Users/me/.rvm/gems/ruby-2.1.1#global/gems/railties-4.0.4/lib/rails/commands/console.rb:9:in `start'
from /Users/me/.rvm/gems/ruby-2.1.1#global/gems/railties-4.0.4/lib/rails/commands.rb:62:in `<top (required)>'
from bin/rails:4:in `require'
from bin/rails:4:in `<main>'
2.1.1 :002 >
Whereas the tutorial would only show:
2.1.1 :001 > asdf
NameError: undefined local variable or method `asdf' for main:Object
Is that other information useful? Is there a way to suppress it?
Working through Michael Hartl's Ruby on Rails Tutorial and hit a snag on section 2.3.3
"We first invoke the console with rails console at the command line, and then retrieve the first user from the database using User.first (putting the results in the variable first_user):7"
Any help would be much apprecaited
$ rails console
Loading development environment (Rails 3.2.13)
1.9.3-p429 :001 > >> first_user = User.first
SyntaxError: (irb):1: syntax error, unexpected tRSHFT
>> first_user = User.first
^
from /Users/MattPerloe/.rvm/gems/ruby-1.9.3-p429#rails3tutorial2ndEd/gems/railties-3.2.13/lib/rails/commands/console.rb:47:in `start'
from /Users/MattPerloe/.rvm/gems/ruby-1.9.3-p429#rails3tutorial2ndEd/gems/railties-3.2.13/lib/rails/commands/console.rb:8:in `start'
from /Users/MattPerloe/.rvm/gems/ruby-1.9.3-p429#rails3tutorial2ndEd/gems/railties-3.2.13/lib/rails/commands.rb:41:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
You don't need to put >> before your code.
The >> in the tutorial is only to imply that the followed command is being entered in the rails console.
The following will be enough:
rails console
first_user = User.first
I just upgraded from Rails 3.1.0 to 3.2.3. Once I got my gem dependency issues cleared up I managed to run tests and I discovered this:
1.9.2p180 :005 > Rails.version
=> "3.2.3"
1.9.2p180 :006 > a = 'test'
=> "test"
1.9.2p180 :007 > a.try(:banana)
NoMethodError: undefined method `banana' for "test":String
from /Users/jamesthullbery/.rvm/gems/ruby-1.9.2-p180#app_tier/gems/activesupport-3.2.3/lib /active_support/core_ext/object/try.rb:32:in `try'
from (irb):7
from /Users/jamesthullbery/.rvm/gems/ruby-1.9.2-p180#app_tier/gems/railties-3.2.3/lib/rails /commands/console.rb:47:in `start'
from /Users/jamesthullbery/.rvm/gems/ruby-1.9.2-p180#app_tier/gems/railties-3.2.3/lib/rails/commands/console.rb:8:in `start'
from /Users/jamesthullbery/.rvm/gems/ruby-1.9.2-p180#app_tier/gems/railties-3.2.3/lib/rails/commands.rb:41:in `<top (required)>'
from script/rails:6:in `require'
from script/rails:6:in `<main>'
1.9.2p180 :008 >
When I perform the same command on Rails 3.1.0 I get no issues:
1.9.2p180 :004 > Rails.version
=> "3.1.0"
1.9.2p180 :005 > a = 'test'
=> "test"
1.9.2p180 :006 > a.try(:banana)
=> nil
1.9.2p180 :007 >
Has anyone seen this issue? Certainly there is something wrong with my environment and not the Rails framework. It seems to be pretty difficult to accurately search for the method try, so I haven't found anything online yet. Is anyone else seeing this? Thanks!
Object#try is supposed to deal with nil receivers. It should not be used to avoid NoMethodError exceptions.
The behavior you saw in 3.1.0 was a bug and it was "fixed" 7 months ago (as of this writing).