Couldn't create database, undefined method `quote_ident'? - ruby-on-rails

rake db:create
I get the following error:
undefined method `quote_ident' for PGconn:Class
Having googled for a solution, it seems by adding:
def PGconn.quote_ident(name)
%("#{name}")
end
to config/initializers/new_rails_defaults.rb should solve the problem, but I'm still getting the error! Any suggestions? Thank you
See error here: http://github.com/mneumann/postgres-pr/issues/issue/1

The solution is to add:
def PGconn.quote_ident(name)
%("#{name}")
end
to active_record/connection_adapters/postgresql_adapter.rb

I would think this is a version mismatch.
Are you sure you have the right versions of everything installed? E.g. Postgres server, libpgsql (Postgres client library), whatever library Ruby has for accessing Postgres, and finally your application (rake)?

Related

Rails undefined local variable or method `first' for ActiveRecord::NullMutationTracker:Class on local

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which is here, so it is not directly from rails, but a very outdated gem we have in our code for some reason.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).

Ruby Migration Error: undefined method `id' for nil:NilClass

Using Rails 4.2.6, Ruby 2.0.0, OSX 10.11
I'm trying to run the rails server. Before that, I run "rake db:migrate", then I get the following error:
rake aborted!
StandardError: An error has occurred, this and all later migrations canceled:
undefined method `id' for nil:NilClass
I'm quite new on Ruby. Can someone explain the error and how to solve it?
Thank you!
I just ran into this as well. The answer above wasn't very helpful in this case because so much of running the migration is meta programed in Active Record.
For me, the issue was that I had written a migration like this:
create_table :user_table do |t|
t.id :reference_table_id
end
I fixed it by changing the middle line to t.integer instead because id is not a column type.
Without seeing your migration I cannot be sure this will solve your issue, but it's what worked for me!
Look at the stack trace of the error (the stuff on the terminal after the error is displayed)
You should see a pointer to the line of code where the error is. It'll probably be something like x.id where x is the nil value

Can't create users in rails when using authlogic because of cookies

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.

SslRequirement.disable_ssl_check error undefined method?

I am working on an established project, Rails 3, and trying to turn of SSL in development. The following line in environments/development.rb generates an error.
config.after_initialize do
SslRequirement.disable_ssl_check = true
end
Error reads:
undefined method `disable_ssl_check=' for SslRequirement:Module (NoMethodError)
Any pointers to this?
Searches have revealed little so far.
Thank you
Based on the version number you provided (0.1.0) the problem is likely caused by the fact that you are using a different gem.
The one you use is ssl_requirement (repo), whereas the disable_ssl_check method is provided by bartt-ssl_requirement (repo). The latter one is actually a fork of the former one so you might try to upgrade.

How can I override a method in a ConnectionAdapter class in Rails 3 for use in a rake task?

In order to override the table_exists? method in the Rails PostgreSQL adapter I have tried the following in an initializer file:
ActiveRecord::ConnectionAdapters::PostgreSQLAdapter.class_eval do
def table_exists?(name)
raise 'got here'
end
end
This will raise the the following error:
uninitialized constant ActiveRecord::ConnectionAdapters::PostgreSQLAdapter
I believe this would have worked in previous versions of rails and I even found a small plugin that did something like this in Rails 2.3.6. Also I only encounter this error when I am trying to run a rake task like db:migrate and not when I start my application server.
Could someone show me the right way to do this and / or explain why PostgreSQLAdapter doesn't seem to be loaded when I am in an initializer file?
Instead of config/initializers, place that code in lib/ folder.
While this means that the active_record is loaded after the rails initializers, which is unusual. I ll update this with more detail, once I am done investigating the whole flow. If you want some more details about the rails 3 initialization process, check out this link:
http://ryanbigg.com/guides/initialization.html
I had success by moving this code into a Rails plugin. It is a little bit more overhead, but it is working consistently when I run rails s and when I run rake db:migrate.
I just followed the rails guide page on the topic and ran
rails generate plugin rails_patches --with-generator
and moved my init.rb file into rails as recommended.
~vendor/
`~plugins/
`~rails_patches/
|~lib/
| `-rails_patches.rb
|~rails/
| `-init.rb
|+test/
|-install.rb
|-MIT-LICENSE
|-Rakefile
|-README
`-uninstall.rb
I put this code in init.rb:
require 'rails_patches'
I put this code in rails_patches.rb:
ActiveRecord::ConnectionAdapters::PostgreSQLAdapter.class_eval do
def table_exists?(name)
raise 'got here'
end
end
This now behaves as I expected.

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