Raise Error Rails Controller
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Rails Raise Error In Model
developers or posting ads with us Stack Overflow Questions Jobs Documentation Tags Users Badges Ask Question x Dismiss Join the rails exception types Stack Overflow Community Stack Overflow is a community of 6.2 million programmers, just like you, helping each other. Join them; it only takes a minute: Sign up How do I raise an rails standard error exception in Rails so it behaves like other Rails exceptions? up vote 51 down vote favorite 11 I would like to raise an exception so that it does the same thing a normal Rails exception does. Specially, show the exception and stack trace in development mode and show "We're sorry, but something went wrong" page in production mode. I tried the following: raise "safety_care group missing!"
Rails Raise Internal Server Error
if group.nil? But it simply writes "ERROR signing up, group missing!" to the development.log file ruby-on-rails exception exception-handling share|improve this question asked Dec 16 '09 at 22:49 Chirag Patel 2,24762433 2 the error message you posted does not seem to come from this exception (it's a different message) is this really what you're seeing? –levinalex Dec 17 '09 at 0:31 add a comment| 2 Answers 2 active oldest votes up vote 84 down vote accepted You don't have to do anything special, it should just be working. When I have a fresh rails app with this controller: class FooController < ApplicationController def index raise "error" end end and go to http://127.0.0.1:3000/foo/ I am seeing the exception with a stack trace. You might not see the whole stacktrace in the console log because Rails (since 2.3) filters lines from the stack trace that come from the framework itself. See config/initializers/backtrace_silencers.rb in your Rails project share|improve this answer edited Dec 17 '09 at 0:30 answered Dec 17 '09 at 0:11 levinalex 3,8902544 2 Excellent, concise answer. –rcd Jan 5 '14 at 22:13 The skitch link (seeing the exception with a stack trace) isn't work
Rails developers. So many different ways to manage control flow, load objects, respond in standard rails exceptions and erroneous ways. My opinion up until recently was "I'll rails raise unauthorized exception just put a bunch of conditionals in there for different situations."Recently, I've been working more on
Rails Custom Exception
API endpoints and so responding with nice error messages has been more of a priority. I started using Exceptions more throughout my code thanks to http://stackoverflow.com/questions/1918373/how-do-i-raise-an-exception-in-rails-so-it-behaves-like-other-rails-exceptions Avdi Grimm, and I recently wrote and action that I'm particularly proud of. Check it out:# This controller's job is to exchange twitter credentials for Shortmail credentialsclass TwitterReverseAuthController < ApplicationController # First, let's make our own subclass of RuntimeError class Error < RuntimeError; end def api_key_exchange # Here are our required parameters. http://ngauthier.com/2011/09/using-exceptions-to-manage-control-flow.html If any are missing we raise an error screen_name = params.fetch(:screen_name) { raise Error.new('screen_name required') } token = params.fetch(:oauth_token) { raise Error.new('oauth_token required') } secret = params.fetch(:oauth_secret){ raise Error.new('oauth_secret required') } # OK now let's authenticate that user. If we can't find a valid user, raise an error @user = User.by_screen_name(screen_name).where( :oauth_token => token, :oauth_secret => secret ).first or raise Error.new('user not found') # Now we'll build a device. I'm not catching an exception on create! here because # It should never fail. (I.e. a failure is actually a 500 because we don't expect it) @device = Device.find_or_create_by_token!( params.slice(:token, :description).merge(:user_id => @user.id) ) render :json => { :api_key => @device.api_key } # Now I can simply catch any of my custom exceptions here rescue Error => e # And render their message back to the user render :json => { :error => e.message }, :status => :unprocessable_entity endendHere are the things I
search `raise_error` matcher Use the raise_error matcher to specify that a block of code raises an error. The most basic form passes https://www.relishapp.com/rspec/rspec-expectations/docs/built-in-matchers/raise-error-matcher if any error is thrown: expect { raise StandardError }.to raise_error You can http://www.railway.at/articles/2008/08/01/to-raise-or-not-to-raise/ use raise_exception instead if you prefer that wording: expect { 3 / 0 }.to raise_exception raise_error and raise_exception are functionally interchangeable, so use the one that makes the most sense to you in any given context. In addition to the basic form, above, there are a number of ways to specify rails raise details of an error/exception: expect { raise "oops" }.to raise_error expect { raise "oops" }.to raise_error(RuntimeError) expect { raise "oops" }.to raise_error("oops") expect { raise "oops" }.to raise_error(/op/) expect { raise "oops" }.to raise_error(RuntimeError, "oops") expect { raise "oops" }.to raise_error(RuntimeError, /op/) Scenarios expect any error expect specific error match message with a string match message with a regexp matching message with `with_message` match class raise error rails + message with string match class + message with regexp set expectations on error object passed to block expect no error at all expect any error Given a file named "example_spec" with: RSpec.describe "calling a missing method" do it "raises" do expect { Object.new.foo }.to raise_error end end When I run rspec example_spec Then the example should pass expect specific error Given a file named "example_spec" with: RSpec.describe "calling a missing method" do it "raises" do expect { Object.new.foo }.to raise_error(NameError) end end When I run rspec example_spec Then the example should pass match message with a string Given a file named "example_spec.rb" with: RSpec.describe "matching error message with string" do it "matches the error message" do expect { raise StandardError, 'this message exactly'}. to raise_error('this message exactly') end end When I run rspec example_spec.rb Then the example should pass match message with a regexp Given a file named "example_spec.rb" with: RSpec.describe "matching error message with regex" do it "matches the error message" do expect { raise StandardError, "my message" }. to raise_error(/my mess/) end end When I run rspec example_spec.rb Then the example should pass matching message with `with_message` Given
in realizing this i18n interface and with this article I don't want to attack them in any way. You may want to read Sven Fuchs' writeup on the Rails i18n features first in order to better understand some parts of the article. The Stumbling Block A few days ago when I tried to implement the i18n functionality for Rails' Date and Time classes I stumbled across an interesting part in the i18n source or, to be more specific, in the simple backend's localize method: def localize(locale, object, format = :default) raise ArgumentError, "Object must be a Date, DateTime or Time object. #{object.inspect} given." unless object.respond_to?(:strftime) type = object.respond_to?(:sec) ? 'time' : 'date' formats = translate(locale, :"#{