rails uninitialized constant Sprockets::SassCacheStore

Tag: ruby-on-rails,ruby,sass,gem,sprockets

I'm new to rails and trying to do some playing around with gems and such.

My case here is that I have this navigation menu on my website and I needed to get the current_page link selected.. rather than building a helper I wanted to install a gem so I went and looked for one and found this one.

I then followed what the documentation said:

In my gemfile I added gem 'rack_current_page'

Then in the project root config.ru

require ::File.expand_path('../config/environment', __FILE__)
use Rack::CurrentPage
run Rails.application

And finally I ran:

bundle and rails s only to find out I had this error:

uninitialized constant Sprockets::SassCacheStore

The error happens when including the application stylesheet in the layout file.

I'm using the following packages / versions (only listing what might have impact - if I'm missing something let me know)

(<gem> -v)

Rails 4.2.1
Sprockets 3.0.0
Sass 3.4.13
Rack 1.5

While doing the uninstall I removed every line I added - heck I also reset my project files to head since I just started working on it anyways, ran a fresh bundle, restarted the server, checked the site but all I'm getting is the error above..

I googled and tried to look for a similar question on SO but couldn't find any so the only thing I could really try was the uninstall and reset my git.

I'm definitely looking over something really stupid but can't really find the answer so here I am ;)

Any help is appriciated, thanks in advance and comment if I missed info that you guys need.

time of writing

I actually did a quick gem pristine --all with no results either.

EDIT 1

Okay, so with abit of guesswork and the same situation happening before resulting in the recreation of a fresh app in the (short) past I uninstalled the compass-rails gem and ran bundle afterwhich rails s to test if things started working.

It did. Then I went on and reinstalled compass-rails and it kept working... getting quite confused now :S

Best How To :

Okay so here goes:

I've found the problem and it was solved by actually supplying a version that works with rails 4.2.

The default gem compass-rails installs a version incompatible with sprockets.

When I added the specific version as seen here and ran another bundle the versions of most of the packages I named in the question changed.

console output after gemfile modification included:

Installing sprockets 2.12.3 (was 3.0.0)
Using sprockets-rails 2.3.1 (was 2.2.4)
Installing sass-rails 5.0.1 (was 5.0.3)
Installing compass-rails 2.0.4 (was 2.0.1)

Guess it's just waiting for compass to release a compatible version.

Rails: Posting from a form to a M:M table

ruby-on-rails,activerecord

As I said, you need to tweak your create action like this in order to save group_id. def create @group = Group.find(params[:group_id]) @discussion = current_user.discussions.build(discussion_params) @discussion.group_id = @group.id if @discussion.save flash[:success] = "Discussion started." redirect_to root_url end end OR You can add a hidden_field in your form_for to save group_id...

Ruby access words in string

ruby

What you are doing will access the fourth character of String s. Split the string to an array and then access the fourth element as follows. puts s.split[3] Note: Calling split without parameters separates the string by whitespace. Edit: Fixing indexes. The index starts from 0. That means s.split[3] will...

RoR Tutorial Chapter 3 - Guard detects changes but doesn't fully execute tests

ruby-on-rails,railstutorial.org,minitest,guard

2 tests, 2 assumptions, 0 failures, 0 errors, 0 skips means guard successfully ran 2 tests containing two assumptions (assertions). The messages in the debug log are telling you of missing dependencies. You could save yourself a big headache and use the free cloud 9 and heroku setup Hartl suggests,...

Allowing some enabled and disabled option on collection_select

ruby-on-rails,ruby

collection_select internally relies on options_from_collection_for_select helper. Rather than using the collection_select directly, you can use select and pass the result of a options_from_collection_for_select call. The reason you may want to call options_from_collection_for_select directly, is because this method also accepts an optional selected parameter that could be used to pass a...

Get X days out of an Array

ruby,ruby-on-rails-4

I would do: def get_days(wkn, *desired_days) get_week = Model.week(2) get_days_of_week = get_week.select { |x| desired_days.include? x.strftime("%A") } end ...

Rails shared controller actions

ruby-on-rails,ruby,ruby-on-rails-4

You should pass actions to the included block and perform_search_on to the class_methods block. module Searchable extend ActiveSupport::Concern class_methods do def perform_search_on(klass, associations = {}) ............. end end included do def filter respond_to do |format| format.json { render 'api/search/filters.json' } end end end end When your Searchable module include a...

Rails Association Guidance [on hold]

ruby-on-rails,ruby,ruby-on-rails-4,ruby-on-rails-3.2

So, the complex part of your situation is that you have one thing (Surgery) that can be of many different types, and the different types have different fields. There are a number of different approaches to this problem, and I don't believe there's wide consensus on the 'best way'. The...

How to send a mail by postfix mail server with rails?

ruby-on-rails,email,mailer

You need to change the delivery_method from :smtp to :sendmail config.action_mailer.delivery_method = :sendmail ...

ActiveAdmin ::Show 4 textbox in active admin using has_many relationship

ruby-on-rails,gem,activeadmin

Add the following to your Polls Controller- def new @poll = Poll.new 4.times do @poll.answers.build end end ...

Showing and editing has_many objects in Rails

ruby-on-rails,ruby-on-rails-4

Since you need to support both (POST /milestones and POST /projects/:project_id/milestones) the project_id to the form: <%= form_for [@project,Milestone.new] do |f| %> ... <%= f.hidden_field(:project_id, value: @project_id) %> ... <%- end -%> Or if your resource is always nested than project_id available in the params in your controller so you...

What is Rack::Utils.multipart_part_limit within Rails and what function does it perform?

ruby-on-rails,ruby,rack,multipart

Telling it short, this value limits the amount of simultaneously opened files for multipart requests. To understand better what is multipart, you can see this question. The reason for this limitation is an ability to better adjust your app for your server. If you have too many files opened at...

Ruby boolean logic: some amount of variables are true

ruby

[a, b, c].count(true) < 2 ........................

Heroku RAM not increasing with upgraded dynos

ruby-on-rails,ruby,ruby-on-rails-3,memory,heroku

That log excert is from a one off dyno, a la heroku run console - this is entirely seperate to your web dynos which you may be runnning 2x dyno's for. You need to specifiy --size=2x in your heroku run command to have the one off process use 2x dynos.

Mongoid HABTM relationships across embedded documents

ruby-on-rails,ruby-on-rails-4,mongoid,embedded-documents

The reason you are getting the error is because of the logic below. If you are going to need to represent many-to-many relations, do not use a document model to store your state. Use a relational one === You can't represent a many to many relation without an association/reference table/object....

Same enum values for multiple columns

ruby-on-rails,ruby,enums

Maybe it makes extract the planet as another model? def Planet enum type: %w(earth mars jupiter) end class PlanetEdge < ActiveRecord::Base belongs_to :first_planet, class_name: 'Planet' belongs_to :second_planet, class_name: 'Planet' end You can create a PlanetEdge by using accepts_nested_attributes_for: class PlanetEdge < ActiveRecord::Base belongs_to :first_planet, class_name: 'Planet' belongs_to :second_planet, class_name: 'Planet'...

Active Record association links, but can't assign values

ruby-on-rails

Your column should be permission_id, not permissions_id. That is why AR doesn't find the related model.

Ruby- get a xml node value

ruby,xml

Try to use css instead of xpath, this will work for you, doc = Nokogiri::XML(response.body) values = doc.css('Name').select{|name| name.text}.join',' puts values => Ram,Sam ...

For loop with flexible stop variable

ruby

Normally we'd use a loop do with a guard clause: x = 1 loop do break if x >= y x += 1 ... end Make sure y is larger than x or it'll never do anything. y can change if necessary and as long as it's greater than x...

Heroku rake db:migrate failing - uninitialized constant

ruby-on-rails,ruby,heroku

Your migration file named should correspond to AddWeightToExercises. It should be accordingly xxxxxxxx_add_weight_to_exercises, where xxxxxxx corresponds to a particular timestamp.

Ruby on Rails - Help Adding Badges to Application

ruby-on-rails,ruby,rest,activerecord,one-to-many

Take a look at merit gem. Even if you want to develop your own badge system from scratch this gem contains plenty of nice solutions you can use. https://github.com/merit-gem/merit

Get the actual value of a boolean attribute

ruby,page-object-gem,rspec3,rspec-expectations

The Page-Object gem's attribute method does not do any formatting of the attribute value. It simply returns what is returned from Selenium-WebDriver (or Watir-Webdriver). In the case of boolean attributes, this means that true or false will be returned. From the Selenium-WebDriver#attribute documentation: The following are deemed to be “boolean”...

Keep leading zeroes when converting string to integer

ruby

Short answer: no, you cant. 2.1.5 :001 > 0001 => 1 0001 doesn't make sense at all as Integer. In the Integer world, 0001 is exactly as 1. Moreover, the number of leading integer is generally irrelevant, unless you need to pad some integer for displaying, but in this case...

Stack level too deep because recursion

ruby-on-rails,ruby,ruby-on-rails-4,twitter

If you express the relation properly, ActiveRecord will do it for you class Tweet belongs_to :original_tweet, class_name: Tweet has_many :retweets, class_name: Tweet, dependent: :destroy, inverse_of :original_tweet end Tweet.last.destroy # will now destroy dependents ...

On rendering from controller, current_page method does not seem to work

ruby-on-rails,ruby,ruby-on-rails-4,model-view-controller

You can use content_for and yields to create a default in your layout which views can override. # layouts/application.html.erb: <% if content_for?(:banner) %> <%= yield(:banner) %> <% else %> <div id="banner"> <h1>This is the default...</h1> </div> <% end %> /users/signup.html.erb: <%- content_for :banner, flush: true do -%> <!-- move along,...

Is it possible to have two callbacks in around_destroy in rails?

ruby-on-rails,activerecord,callback

It'll work without any issue, as Active Record wraps-up these callback methods in a single transaction. Since the object is destroyed in first yield, it seems the later is not feasible (assuming everything is running in one thread). How Rails handles this? No, object isn't destroyed in first yield. Object...

Ruby: How to copy the multidimensional array in new array?

ruby-on-rails,arrays,ruby,multidimensional-array

dup does not create a deep copy, it copies only the outermost object. From that docs: Produces a shallow copy of obj—the instance variables of obj are copied, but not the objects they reference. dup copies the tainted state of obj. If you are not sure how deep your object...

Split an array into slices, with groupings

arrays,ruby,enumerable

Yes, this bookkeeping with i is usually a sign there should be something better. I came up with: ar =[ { name: "foo1", location: "new york" }, { name: "foo2", location: "new york" }, { name: "foo3", location: "new york" }, { name: "bar1", location: "new york" }, { name:...

Make instance variable accessible through hash in Ruby

ruby-on-rails,ruby,ruby-on-rails-4,activerecord

It's not "through Hash", it's "array access" operator. To implement it, you need to define methods: def [](*keys) # Define here end def []=(*keys, value) # Define here end Of course, if you won't be using multiple keys to access an element, you're fine with using just key instead of...

Javascript not executing when using link_to

javascript,jquery,ruby-on-rails

This is a result of Turbolinks. You can get around this with the following: $(document).on 'click', '.my-btn', (event) -> ... This is happening because Turbolinks is loading the page, and there isn't a document ready event being fired. You want to wait until Turbolinks fires the page:load event. You do...

Can Rails deal with DB uniqueness without index?

mysql,ruby-on-rails,rdbms

Because there is no need for other ways. Under the hood it's all the same: when you define a UNIQUE constraint, a UNIQUE index is created on that table to enforce it. Question from DBA.SE: When should I use a unique constraint instead of a unique index? So for a...

Routes work in Development But not in Production

ruby-on-rails,routes

As you can see from logs, you got error page because of line 78 of app/views/shared/_header.html.erb file. In this piece of code, where you creating link <%= link_to "My Account", edit_company_path(current_user.company_id) %> Check if company_id is not nil for that particular user. I'm pretty sure it's nil in your case....

Rails basic auth not working properly

ruby-on-rails,ruby,authentication

@user.keys.each do |key| username == key.api_id && password == key.api_key end This piece of code returns a value of .each, which is the collection it's called on (@user.keys in this case). As it is a truthy value, the check will pass always, regardless of what are the results of evaluating...

If statement for search field in Rails

jquery,ruby-on-rails,search,if-statement

The standard way to use a search would be to include a parameter in the URL. That way you can have a similar to if user_signed_in? check for the parameter: if params[:search].present?.

Loop until i get correct user

ruby,redis

Change if to while: while ["user_4", "user_5"].include?(@randUser = @redis.spop("users")) do @redis.sadd("users", @randUser) end $user_username = @redis.hget(@randUser, "username") $user_password = @redis.hget(@randUser, "password") Please note, that you actually mixed up receiver and parameters on Array#include?...

How to pass array in rails 4 strong parameters

ruby-on-rails,arrays

According to the docs https://github.com/rails/strong_parameters#permitted-scalar-values: The permitted scalar types are String, Symbol, NilClass, Numeric, TrueClass, FalseClass, Date, Time, DateTime, StringIO, IO, ActionDispatch::Http::UploadedFile and Rack::Test::UploadedFile. To declare that the value in params must be an array of permitted scalar values map the key to an empty array: params.permit(:id => []) If...

How to pivot array into another array in Ruby

arrays,ruby,csv

Here is a way using an intermediate hash-of-hash The h ends up looking like this {"Alaska"=>{"Rain"=>"3", "Snow"=>"4"}, "Alabama"=>{"Snow"=>"2", "Hail"=>"1"}} myArray = [["Alaska","Rain","3"],["Alaska","Snow","4"],["Alabama","Snow","2"],["Alabama","Hail","1"]] myFields = ["Snow","Rain","Hail"] h = Hash.new{|h, k| h[k] = {}} myArray.each{|i, j, k| h[i][j] = k } p [["State"] + myFields] + h.map{|k, v| [k] + v.values_at(*myFields)} output...

How to find a record from database by using find_by with two fields?

ruby-on-rails

If you're using Rails 4 you can do: @user = User.find_by(first_name: "John", last_name: "Doe") If rails 3: @user = User.find_by_first_name_and_last_name("John", "Doe")...