A long-lived project that still receives updates
Provides some quality of life developer tools.


 Project Readme

Effective Developer

This gem contains some developer quality of life scripts and rails helpers.

Getting Started

To use the included rails helpers and rake tasks in your current rails project, add to the Gemfile:

group :development
  gem 'effective_developer'

Run the bundle command to install it:

bundle install

To use the included command line shell scripts in any directory, clone this repo:

git clone git@github.com:code-and-effect/effective_developer.git

and add the following to your PATH (edit your ~/.bashrc or ~/.profile):

export PATH="$PATH:$HOME/effective_developer/bin"

To use the included git hooks for all git repos, run the following:

git config --global core.hooksPath ~/effective_developer/githooks

Shell scripts

To use the included command line shell scripts:

export PATH="$PATH:$HOME/effective_developer/bin"


A command line shell script to update a Gemfile and use any provided gems locally.

This makes it very quick to swich to developing a gem locally.

gem_develop should be run from the root directory of any rails app.

> gem_develop effective_datatables effective_resources

to change:

gem 'effective_datatables'
gem 'effective_resources'


gem 'effective_datatables', path: '~/Sites/effective_datatables'
gem 'effective_resources', path: '~/Sites/effective_resources'

and execute bundle.

You can override the ~/Sites/ directory by setting ENV['GEM_DEVELOP_PATH'].


A command line shell script that quickly bumps the version of any ruby gem.

It checks for any uncommitted files, updates the gem's version.rb with the given version, makes a single file git commit with a tag and message, then runs git push origin master, gem build and gem push to rubygems.

gem_release should be run from the root directory of any ruby gem.

To print the current gem version:

> gem_release

To release a new gem version:

> gem_release 1.0.0


A command line shell script to update a Gemfile to find any locally developed gems, and update them to the most current released version.

gem_reset should be run from the root directory of any rails app.

Just run with no arguments:

> gem_reset

to change:

gem 'effective_datatables', path: '~/Sites/effective_datatables'
gem 'effective_resources', path: '~/Sites/effective_resources'


gem 'effective_datatables'
gem 'effective_resources'

and execute bundle update effective_datatables effective_resources.


Careful, this command will delete all your un committed changes.

A command line script to call git reset --hard and also delete any newly created files.

It truly resets you back to a fresh working copy. Perfect for tweaking scaffold and code generation tools.

> gitreset


A command line script to delete any git branch that has already been merged into master & develop

> gitsweep


kill -9 the first running puma process. Bails out of SystemStackError (stack level too deep).

> killpuma

Git hooks

To use the included git hooks for all git repos, run the following:

git config --global core.hooksPath ~/effective_developer/githooks


Prevents pushing git commits that have the following bad patterns:

  • Gemfile includes 'path: ' gems
  • binding.pry

Rake scripts


Exports all database tables to individual .csv files.

rake export:csv


Where table is the name of a model. Dynamically created rake task when a /lib/csv_importers/foos.rb file is present.

rake csv:import:foos


Scaffolds an Effective::CsvImporter file for each .csv file in /lib/csv_importers/data/*.csv

rake csv:scaffold


rake csv:scaffold[users]


Quickly rename a rails class throughout the entire app.

The script considers the .classify, .pluralize and .singularize common usage patterns.

Then performs a global search and replace, and renames files and directories.

rake rename_class[account,team]


rake rename_class[account,team,skipdb]

to skip any changes to database migrations.


If you ever run into the error duplicate key violates unique constraint (id) error, run this script:

rake reset_pk_sequence

This makes sure that the autoincremented (postgresql) Pk sequence matches the correct id value.


Creates a new backup on heroku, downloads that backup to latest.dump, and then calls pg:load

rake pg:pull
rake pg:pull[staging]


Drops and re-creates the local database then initializes database with the contents of latest.dump

rake pg:load
rake pg:load[something.dump]


Saves the development database to a postgresql .dump file (latest.dump by default)

rake pg:save
rake pg:save[something.dump]


Clones the production (--remote heroku by default) database to staging (--remote staging by default)

rake pg:clone
rake pg:clone[origin,staging]


Loads every ActiveRecord object and calls .valid? on it.

rake validate
rake validate[post]

Rails Helpers

CSV Importer

Extend a class from Effective::CsvImporter to quickly build a csv importer.

Put your importer in lib/csv_importers/users_importer.rb and the data in lib/csv_importers/data/users.csv. Both filenames should be pluralized.

A rake command will be dynamically created rake import:users.

Required Methods

The importer requires two instance methods be defined:

  • def columns a hash of names to columns. The constants A == 0, B == 1, upto AT == 45 are defined to work better with spreadsheets.
  • def process_row will be run for each row of data. Any exceptions will be caught and logged as errors.

Inside the script, there are a few helpful functions:

  • col(:email) will return the normalized value in that column.
  • last_row_col(:email) will return the normalized value for this column in the previous row.
  • raw_col(:email) will return the raw value in that column
module CsvImporters
  class UsersImporter < Effective::CsvImporter
    def columns
        email: A,
        first_name: B,
        last_name: C,
        admin?: D

    def process_row
      User.new(email: col(:email), first_name: col(:first_name), last_name: col(:last_name), admin: col(:admin?)).save!


When using col() or last_row_col() helpers, the value is normalized.

  • Any column that ends with a ? will be converted into a boolean.
  • Any column that ends with _at will be converted into a DateTime.
  • Any column that ends with _on will be converted into a Date.
  • Override def normalize to add your own.
def normalize(column, value)
  if column == :first_name

Override before_import() or after_import() to run code before or after the import.

Code Generation

The goal of the effective_developer code generation project is to minimize the amount of hand coding required to build a rails website.

Only the rails model file should be written by a human.

All database migrations, controllers, forms and views should be generated.

Creating a new working in-place CRUD feature should be a 1-liner.

A huge head start to the interesting part of the code.

effective scaffolds

Scaffolding is the fastest way to build a CRUD rails app.

The effective scaffolds generally follow the same pattern as the rails generate commands.

To create an entire CRUD resource from the command line:

rails generate effective:scaffold thing name:string description:text
rails generate effective:scaffold thing name:string description:text --actions index show mark_as_paid
rails generate effective:scaffold admin/thing name:string description:text
rails generate effective:scaffold admin/thing name:string description:text --actions crud-show

Or to skip the model & migration:

rails generate effective:scaffold_controller thing
rails generate effective:scaffold_controller thing index show
rails generate effective:scaffold_controller thing index show --attributes name description
rails generate effective:scaffold_controller admin/thing crud mark_as_paid
rails generate effective:scaffold_controller admin/thing crud-show

model file

If there is a regular rails model file present, all attributes, belong_tos, scopes and has_many accepts_nested_attributes will be considered when generating the scaffold.

Make a model file like this (or generate it with rails generate effective:model post name:string body:text and tweak from there):

class Post < ApplicationRecord
  belongs_to :user
  belongs_to :category

  # Attributes
  effective_resources do
    title        :string
    body         :text
    published_at :datetime

  validates :title, presence: true
  validates :description, presence: true

  has_many :comments
  accepts_nested_attributes_for :comments

  scope :published, -> { where.not(published_at: nil) }

  def to_s
    title || 'New Post'

and then run

rails generate effective:scaffold post
rails generate effective:scaffold_controller admin/post

Tweak from here

all scaffolds

You can call scaffolds one at a time:

# These two accept attributes on the command line. like effective:scaffold
rails generate effective:model thing name:string description:text
rails generate effective:migration thing name:string description:text

# Thes accept actions on the command line. Pass --attributes as an option. like effective:scaffold_controller
rails generate effective:controller thing  # /admin/thing
rails generate effective:route thing
rails generate effective:ability thing # CanCanCan
rails generate effective:menu thing  # If app/views/*namespaces/_navbar.html.haml is present
rails generate effective:datatable thing
rails generate effective:views thing
rails generate effective:form thing


MIT License. Copyright Code and Effect Inc.


  1. Fork it
  2. Create your feature branch (git checkout -b my-new-feature)
  3. Commit your changes (git commit -am 'Add some feature')
  4. Push to the branch (git push origin my-new-feature)
  5. Bonus points for test coverage
  6. Create new Pull Request