Currently when I look in the log files of my rails application I get stacktraces like:
NoMethodError (undefined method `[]' for nil:NilClass):
app/controllers/concerns/example.rb:192:in `rescue in create_example'
app/controllers/concerns/example.rb:163:in `create_example'
app/controllers/concerns/example.rb:11:in `example'
app/controllers/example_controller.rb:39:in `create'
The error is triggered from a second project which is included as gem.
On line 192 in the example.rb (concern) we use some classes from that included gem and in that class the real exception occurs.
Another example:
ZeroDivisionError (divided by 0):
app/controllers/dummy_controller.rb:15:in `index'
And on line 15
test_object.divide_by_zero
test_object is an instance of a class defined in the included gem
I want rails to display and log the full stacktrace including all or specific gems but I can't figure out how to do this. Does someone know how to do this? or someone that can give me a push in the right direction?
Thanks!!!
It's used like this:
Rails.backtrace_cleaner.remove_silencers!
Depending on what version of rails you are using this may help:
http://api.rubyonrails.org/classes/ActiveSupport/BacktraceCleaner.html#method-i-remove_silencers-21
Related
I have a Rails 6 app and we're using jbuilder to define the shape of JSON responses.
Recently, I started getting the following error:
ActionView::Template::Error (undefined method `empty?' for #<Account:0x0000000116743030>):
The stack trace points to this block inside a jbuilder file:
json.account do
json.call(#account, *Account::APP_FIELDS)
json.logo_url #account.logo
end
If I comment out both of the lines inside the block, the error goes away. If I remove either of the lines and leave the other, the error returns. The stack trace just points me to the first line of the block.
What's going on? How do I fix this?
Figured it out!
Higher in the jbuilder file, a partial is included that adds the same account key. This was causing some kind of name collision.
I stumbled on this by temporarily testing with my key renamed accountt and suddenly it worked. That's when I realized it was conflicting name that was causing the issue. I didn't see it because it was in a different file and the error message was confusing. If your jbuilder file is complicated and you think you're running into this same issue, this is an easy way to test.
We are getting this error on all local setups of our project(currently) when we call any method like:
belongs_to :abc
after_create :some_method
def some_method
if self.abc.saved_change_to_parent_id?
...
// or even self.abc.parent_id_before_last_save
end
It gives:
NameError (undefined local variable or method `first' for ActiveRecord::NullMutationTracker:Class):
app/models/model_name.rb:50:in `some_method'
Yes, there is not a full trace with rails internal file paths etc, i only get my project files trace. Maybe its some logger config issue, any help to get full trace will also be appreciated.
There are no such issues i could find on internet, thats why posting here.
PS: Not posted on rails issue tracker(github issues) because i don't have minimal reproduction.
Stack
ruby: 2.4.3
rails: 5.1.5 (also tried on 5.1.7)
OS: Ubuntu 20, also tried on macOS
Thanks in advance.
UPDATE1: Using byebug, i got to this trace, where error is occuring:
/Users/dev/.rvm/gems/ruby-2.4.3/gems/acts_as_singleton-0.0.8/lib/acts_as_singleton.rb:43
which is here, so it is not directly from rails, but a very outdated gem we have in our code for some reason.
As i posted in the update, issue was not with rails or anything, i used byebug to track trace and it was something like:
activemodel-5.1.5/lib/active_model/attribute_methods.rb:384
activerecord-5.1.5/lib/active_record/attribute_methods/dirty.rb:146
activerecord-5.1.5/lib/active_record/attribute_methods/dirty.rb:319
activerecord-5.1.5/lib/active_record/attribute_methods/dirty.rb:315
acts_as_singleton-859f49112c03/lib/acts_as_singleton.rb:43
The last line, should not be there, as we are not using acts_as_singleton on any of the involved models.
So after some tracking, it turned out issue with the gem. I have created a fork and used that fork. Here is the fork: https://github.com/ziaulrehman40/acts_as_singleton (forked it from another fork, which seemingly had some other fixes as well). And you can see my changes here.
What was the issue?
This gem writes a module named Singleton within ActiveRecord module. Which seems ok, unless you realize that there is another module named Singleton already. Whihc is being included in:
gems/activerecord-5.1.5/lib/active_record/attribute_mutation_tracker.rb:83
class NullMutationTracker # :nodoc:
include Singleton
...
So as you can see, this Singleton module gets overriden(or expanded, not sure) un-intentionally by that outdated gem(acts_as_singleton).
So, I have a standard rails 3 app with authlogic. If I'm not in the browser (in the console or in the test environment), I can't create user models.
For example:
I have this code either in a rspec test or in my console:
user = User.create(...user attributes...)
And I get this error:
NoMethodError: undefined method `cookies' for main:Object
I've looked all over the internet and can't figure this out. Any help would be greatly appreciated.
EDIT:
So, I looked around some more and found in the documentation to do this:
include Authlogic::TestCase
but then I get this error:
uninitialized constant Authlogic::TestCase
I had this same exact problem. Where in your application did you put the following line:
Authlogic::Session::Base.controller = Authlogic::ControllerAdapters::RailsAdapter.new(self)
I ran into this error when I placed the line in either the environment.rb file or within a file within my initializer folder.
I eliminated the problem when I placed the line in my ApplicationController instead.
i am using rails_admin. when i go to certain resource. by typin url
localhost:3000/admin/rule
than it give me this error. code is:
scope = Rule.all
scope.page(1).per(2)
. above code is writtten in rails_admin gem.in a file named mongoid.rb placed in adaptors folder. complete log is:
NoMethodError (undefined method `page' for #<Array:0xcea7408>):
mongoid (2.4.8) lib/mongoid/criteria.rb:385:in `method_missing'
/home/usman/.rvm/gems/ruby-1.9.2-p290#system/bundler/gems/kaminari-809105ad782a/lib/kaminari/models/mongoid_extension.rb:11:in `page'
/home/usman/.rvm/gems/ruby-1.9.2-p290#system/bundler/gems/rails_admin-069819944cc9/lib/rails_admin/adapters/mongoid.rb:37:in `all'
/home/usman/.rvm/gems/ruby-1.9.2-p290#system/bundler/gems/rails_admin-069819944cc9/app/controllers/rails_admin/main_controller.rb:127:in `get_collection'
/home/usman/.rvm/gems/ruby-1.9.2-p290#system/bundler/gems/rails_admin-069819944cc9/app/controllers/rails_admin/main_controller.rb:39:in `list_entries'
/home/usman/.rvm/gems/ruby-1.9.2-p290#system/bundler/gems/rails_admin-069819944cc9/lib/rails_admin/config/actions/index.rb:30:in `block (2 levels) in <class:Index>'
what should i do to resolve this error?
You can not call Kaminari methods on Array, because Rule.all will return Array.
So you have to do something like this: Rule.page(1).per(2)
Here is documentation and examples of Kaminari usage:
https://github.com/amatsuda/kaminari
I've been running into this issue off and on for a while now using Mongoid. Sometimes refreshing the page in RailsAdmin would fix it.
I figured out that the problem is Kaminari's hooks are not initialized in my environment, so the models that rely on Kaminari's extension methods don't have them available.
I simply took the following line from Kaminari's railtie and put it at the top of my rails_admin initializer:
Kaminari::Hooks.init
Now things seem to be working for me. However, I don't know why the ActiveSupport callback is not running that code.
Use this
Kaminari.paginate_array(Rule.all).page(params[:page])
Kader's solution is great! The only thing is I found I have to add .per to make it work.
Kaminari.paginate_array(Rule.all).page(params[:page]).per(PER_PAGE_RECORDS)
The extracted source is below :
Showing /usr/lib/ruby/gems/1.8/gems/actionpack-2.3.5/lib/action_controller/templates/rescues/diagnostics.erb where line # raised:
private method `gsub' called for #<NoMethodError: undefined method `closed?' for nil:NilClass>
Extracted source (around line #):
RAILS_ROOT: /home/sharath/Desktop/RORWorkspace/ITPLOW1
It was working before installing Sunspot: A Solr-Powered Search Engine for Ruby.
I am working in Ubuntu 10.04.
I'd need to see the full stacktrace to be sure, but this is actually probably an unhelpful HTTP connection error message bubbling up out of RSolr (the library the Sunspot uses for the low-level Solr connection). Is Solr running (i.e., did you run rake sunspot:solr:start)? Can you access http://localhost:8982/solr/admin ?
What's probably happening is you're attempting to do a substitution on some variable which you thought you were initializing, but neglected to give a real value.
For instance, if you had a form where for a Message and one of the the properties you want is the content, you would normally retrieve that information in the controller with
params[:message][:content]
And if you wanted to filter it, you would do something like
params[:message][:content].gsub(/<[^>]*>/,"")
But if the user didn't enter anything into the content field, the params[:message][:content] variable wouldn't be set. Therefore it's null and you're attempting to do nil.gsub