Ruby + Rails · RSpec & Cucumber · From $20
Do My Ruby Homework
Ruby homework is graded by its test suite, not its output. The mark is a green RSpec or Cucumber run, or a Rails app deployed and passing live tests. A working Rails developer writes code that turns your pre-written specs green on your Ruby version, follows the convention-over-configuration idioms, and survives an office-hours question about your BDD-to-TDD cycle.
Specs go green · Deployed to Heroku/Render · Pay 50% after it passes
What we cover in Ruby
The Rails test stack, not just the syntax
Ruby coursework keys on the test suite and the deploy, so the work has to clear the whole cycle. We write against the same tools your course runs: the Ruby version you pin, RSpec or minitest for the specs, Cucumber and Capybara for the acceptance tests, Bundler for the locked gems, and the RuboCop style guide that quietly carries rubric points.
ActiveRecord associations get modeled the way the schema expects, has_many and belongs_to wired to real foreign keys. Closures use the right tool, a block with yield where the method takes one, a Proc or a lambda where the callback gets stored. Migrations stay reversible. And the Gemfile.lock ships with the repo so the grader resolves the exact gems you did.
Ruby assignments we do
Four assignment shapes, start to green
Make the failing RSpec or minitest suite green
Clone a repo of pre-written specs, then write the Ruby that turns the red bar green: a LinkedList, an Enumerable re-implementation, or a TicTacToe / Hangman game. We use idiomatic blocks and yield, each / map / reduce over manual loops, and proper OOP with attr_accessor and initialize. Gradescope runs the hidden spec file, so the deliverable is the passing suite, not a console screenshot.
The RottenPotatoes BDD-to-TDD feature
Given an existing Rails app, add a feature like find movies by the same director. We write the Cucumber scenarios for the happy path first, drive the implementation with RSpec controller and model specs, add the ActiveRecord migration with add_column, wire up routes.rb and the controller, then deploy to Heroku or Render with live integration tests against the URL. This is the canonical Berkeley CS169 and CSCE 606 project.
A full Rails SaaS app from rails new
A multi-model CRUD app built from scratch: models with has_many and belongs_to associations, RESTful resourceful routes, views, a seeded database from seeds.rb, an RSpec plus Cucumber suite, and a Heroku or Render deployment. The standard Agile-lifecycle capstone in software-engineering courses that teach the ESaaS textbook.
A pure-Ruby closures and metaprogramming exercise
Methods built on Ruby signature constructs without leaning on Rails: a custom each with yield, a Proc or lambda callback, a method_missing metaprogramming task. Correctness gets proven with student-written RSpec. The Odin Project and Launch School tracks grade whether you understand Ruby idioms, not just framework glue.
Ruby problems we fix
Six Ruby errors that hold a spec red
Each one has a known cause and a known fix. We name the mechanism behind the red bar, not just the message, so the same error stops blocking the next spec you write.
NoMethodError: undefined method for nil:NilClass
A method called on nil because a hash key was missing, an ActiveRecord query returned nothing, or a variable was never assigned. We guard with safe navigation (&.), use .fetch with a default, and check the query result before chaining, so the call lands on a real object.
NameError: undefined local variable or method
A variable or method referenced out of scope or misspelled. Ruby is case- and sigil-sensitive, so @count is not count and Foo is not foo. We match the exact name and sigil and define the method or variable in the reachable scope.
FrozenError: can't modify frozen String
Mutating a string literal under frozen_string_literal: true, the default that is trending in Ruby 3.x, with << or gsub!. We build a new string with + or dup instead of mutating the frozen literal in place.
Bundler::GemNotFound or a Gemfile.lock mismatch
The grader's gems do not match yours because bundle install never ran or the lockfile pins a version they do not have. We commit Gemfile.lock, pin the Ruby and Rails versions, and bundle install against the course's exact versions so the suite reproduces.
ActiveRecord::PendingMigrationError on a stale schema
The database schema is out of sync because rails db:migrate never ran or a migration is not reversible. We run the migration, make every migration reversible with change or matching up and down methods, and commit schema.rb.
Red specs and undefined Cucumber steps you cannot clear
An RSpec expect fails on an edge case, an empty array, a nil, or an off-by-one inside a block, or a Cucumber step is undefined. We read the exact expectation, implement the contract it asserts, and define the missing step in features/step_definitions so the whole bar goes green.
From failing specs to a deployed app
Do My Ruby Assignment: From Failing Specs to a Deployed App
An assignment here means the big graded deliverable, the Rails SaaS app or the BDD-to-TDD feature, not the weekly exercise. The RottenPotatoes feature lands as Cucumber scenarios, RSpec controller and model specs, an add_column migration, and a live Heroku or Render URL the grader runs acceptance tests against. A full app from rails new ships with associations, RESTful routes, seeds, and the whole spec suite green.
The repo follows the Rails convention courses enforce: app/models, app/controllers, spec for RSpec, features for Cucumber. The migration runs clean, schema.rb is committed, and the deployed app answers the same acceptance tests it passes locally.
Guided on the cycle
Ruby Assignment Help for Rails and BDD/TDD Projects
Some students want the Rails project built and explained, not just handed over. Every delivery comes with a short write-up of the BDD-to-TDD cycle: which Cucumber scenario drove which RSpec spec, why this ActiveRecord association, and how the deploy debugging went when the suite passed locally but the Heroku release tripped on a pending migration.
Help With a Ruby Assignment You Can Defend
Pair-programming courses ask you to walk the TA through your red-green-refactor. We ship two or three viva-defense questions with answers, on why the spec failed first, why the implementation makes it pass, and what the refactor changed without breaking the bar, so you can account for every commit in office hours.
Weekly RSpec problem sets
Ruby Homework Help for RSpec Problem Sets and OOP Exercises
Homework is the recurring small stuff: an Odin Project block exercise, a Launch School OOP set, a make-the-spec-pass problem from the ruby-exercises repo. These need a green RSpec or minitest run and a fast turnaround, not a deployed app. Send the repo, get a fixed quote, get back code that clears the suite and reads like idiomatic Ruby.
Need Help With Ruby Homework Tonight?
The specs will not go green and the deadline is in the morning. Short turnarounds of 48 to 72 hours are normal, and a same-night rescue on a small problem set is common. Send the failing spec file and the error, and a Rails developer reads the expectation and writes the exact contract it asserts.
# before: 14 examples, 9 failures, NoMethodError for nil:NilClass on submit
# cause: Movie.find_by returned nil, the controller chained .title on nothing
# fix: guard with &., add the add_column migration, bundle install on Ruby 3.2
#
# after: rspec -> 14 examples, 0 failures; cucumber -> 6 scenarios all green
# RuboCop clean, deployed to Render, acceptance tests pass on the URL
#
# "I walked the TA through my red-green-refactor and the BDD cycle."
# - CS169 Agile/Rails student, Ruby 3.2, Rails 7.0, 2026How it works
From red bar to green suite
Send the repo and your Ruby version
Upload the spec repo or the brief, your Ruby line (3.1, 3.2, or 3.3), your Rails version, and whether it is RSpec, minitest, or Cucumber. Name the grader if you know it: Gradescope or the saasbook RAG.
Get a fixed quote in 15 minutes
A Rails developer reads the failing specs and sends one price. No hourly meter, no surprise fees.
Pay half, code written and specs run
You pay 50% upfront. The code is written, the RSpec and Cucumber suite is run, RuboCop is cleared, and the app is deployed before anything reaches you.
Pay the rest after the suite passes
Run bundle exec rspec on your machine. Pay the other 50% only once the bar is green. Revisions stay free for 7 days.
Want the full process first? Read how it works.
Pricing
One fixed price per Ruby assignment, from $20
A single make-the-spec-pass exercise sits at the Standard tier. A multi-model OOP set moves up. A full Rails SaaS app with Cucumber and a deploy lands at Advanced. You see the full number before you pay, you pay half to start, and there are no rush fees.
Ruby homework help
Questions, answered
The Ruby-specific questions students ask before they send a repo: RSpec versus minitest, Gradescope, the RottenPotatoes deploy, RuboCop, and the red-green-refactor cycle.
Can you make the failing RSpec specs pass? +
Yes. We read each expect block and implement the exact contract it asserts, then run the suite on your Ruby version until the red bar turns green and stays green across edge cases.
My course uses minitest, not RSpec. Can you match it? +
Yes. We write assert_equal and assert style minitest or RSpec describe / it / expect, matched to whichever framework your course and its autograder require.
Can you do the RottenPotatoes feature and deploy it to Heroku? +
Yes. Cucumber scenarios for the happy path, RSpec controller and model specs, the add_column ActiveRecord migration, the controller and routes.rb wiring, and a live Heroku or Render URL with acceptance tests run against the deployed app.
My specs pass locally but fail on Gradescope. Can you fix that? +
Yes. That gap is almost always a version or Gemfile.lock mismatch. We pin Ruby and Rails with .ruby-version, lock the gems, and reproduce the grader environment so the suite passes where it is actually scored.
Will the code be idiomatic Ruby and pass RuboCop? +
Yes. Blocks over manual loops, each / map / reduce, attr_accessor for state, and a RuboCop-clean run against the community style guide so the style rubric stops costing you points.
Can you build the whole Rails app from rails new? +
Yes. Models with has_many and belongs_to associations, RESTful resourceful routes, migrations, a seeded database, an RSpec plus Cucumber suite, and a working deployment all ship as one app, not a pile of files.
Can you stage the commits to show a red-green-refactor cycle? +
Yes. The commit history mirrors the TDD cycle, a red spec, then the passing code, then the refactor, with paired attribution for CS169-style pair-programming credit where your course checks it.
Can you explain the blocks-versus-procs-versus-lambdas part so I can defend it? +
Yes. Per-method comments plus two or three viva-defense questions on closures, yield, and your BDD-to-TDD cycle, so you can account for every method when a TA asks.
Related pages
Pages students pair with Ruby
JavaScript for the front end of a Rails backend, SQL for the relational database under ActiveRecord, PHP for the other server-side web-framework language, and the web-development hub where Rails is a core course stack.
Send your Ruby repo now
Name your Ruby version and your deadline. The first reply is free, and you pay nothing until you approve the price.