Graphql setup

Gemfile

@@ -77,6 +77,9 @@ gem "loofah", ">= 2.2.3"
 gem 'webpacker'
 gem 'react-rails'
 
+gem 'rb-readline'
+gem 'graphql'
+
 # Use Capistrano for deployment
 # gem 'capistrano-rails', group: :development
 
@@ -101,3 +104,5 @@ end
 
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem 'tzinfo-data', platforms: [:mingw, :mswin, :x64_mingw, :jruby]
+
+gem 'graphiql-rails', group: :development

Gemfile.lock

@@ -97,6 +97,10 @@ GEM
     fraction (0.3.2)
     globalid (0.4.2)
       activesupport (>= 4.2.0)
+    graphiql-rails (1.7.0)
+      railties
+      sprockets-rails
+    graphql (1.9.3)
     hashid-rails (1.2.2)
       activerecord (>= 4.0)
       hashids (~> 1.0)
@@ -207,6 +211,7 @@ GEM
     rb-fsevent (0.10.3)
     rb-inotify (0.10.0)
       ffi (~> 1.0)
+    rb-readline (0.5.5)
     react-rails (2.4.7)
       babel-transpiler (>= 0.7.0)
       connection_pool
@@ -297,6 +302,8 @@ DEPENDENCIES
   faker (= 1.7.3)
   ffi (>= 1.9.24)
   fraction (~> 0.3.2)
+  graphiql-rails
+  graphql
   hashid-rails (~> 1.2, >= 1.2.1)
   jbuilder (~> 2.5)
   jquery-rails (~> 4.3, >= 4.3.1)
@@ -314,6 +321,7 @@ DEPENDENCIES
   rack (>= 2.0.6)
   rails (~> 5.1.4)
   rails-controller-testing
+  rb-readline
   react-rails
   rubyzip (>= 1.2.2)
   sass-rails

app/controllers/application_controller.rb

@@ -1,5 +1,5 @@
 class ApplicationController < ActionController::Base
-  protect_from_forgery with: :exception
+  protect_from_forgery unless: -> { request.format.json? }
   include SessionsHelper
   include ActionController::Helpers
 

app/controllers/graphql_controller.rb

@@ -0,0 +1,43 @@
+class GraphqlController < ApplicationController
+  def execute
+    variables = ensure_hash(params[:variables])
+    query = params[:query]
+    operation_name = params[:operationName]
+    context = {
+      # Query context goes here, for example:
+      # current_user: current_user,
+    }
+    result = StockcubeAppSchema.execute(query, variables: variables, context: context, operation_name: operation_name)
+    render json: result
+  rescue => e
+    raise e unless Rails.env.development?
+    handle_error_in_development e
+  end
+
+  private
+
+  # Handle form data, JSON body, or a blank value
+  def ensure_hash(ambiguous_param)
+    case ambiguous_param
+    when String
+      if ambiguous_param.present?
+        ensure_hash(JSON.parse(ambiguous_param))
+      else
+        {}
+      end
+    when Hash, ActionController::Parameters
+      ambiguous_param
+    when nil
+      {}
+    else
+      raise ArgumentError, "Unexpected parameter: #{ambiguous_param}"
+    end
+  end
+
+  def handle_error_in_development(e)
+    logger.error e.message
+    logger.error e.backtrace.join("\n")
+
+    render json: { error: { message: e.message, backtrace: e.backtrace }, data: {} }, status: 500
+  end
+end

app/graphql/stockcube_app_schema.rb

@@ -0,0 +1,4 @@
+class StockcubeAppSchema < GraphQL::Schema
+  # mutation(Types::MutationType)
+  query(Types::QueryType)
+end

app/graphql/types/base_enum.rb

@@ -0,0 +1,4 @@
+module Types
+  class BaseEnum < GraphQL::Schema::Enum
+  end
+end

app/graphql/types/base_input_object.rb

@@ -0,0 +1,4 @@
+module Types
+  class BaseInputObject < GraphQL::Schema::InputObject
+  end
+end

app/graphql/types/base_interface.rb

@@ -0,0 +1,5 @@
+module Types
+  module BaseInterface
+    include GraphQL::Schema::Interface
+  end
+end

app/graphql/types/base_object.rb

@@ -0,0 +1,3 @@
+class Types::BaseObject < GraphQL::Schema::Object
+  field :limit, Integer, null: true
+end

app/graphql/types/base_scalar.rb

@@ -0,0 +1,4 @@
+module Types
+  class BaseScalar < GraphQL::Schema::Scalar
+  end
+end

app/graphql/types/base_union.rb

@@ -0,0 +1,4 @@
+module Types
+  class BaseUnion < GraphQL::Schema::Union
+  end
+end

app/graphql/types/cupboard_type.rb

@@ -0,0 +1,12 @@
+class Types::CupboardType < Types::BaseObject
+	field :id, ID, null: false
+	field :users, [Types::UserType], "The users associated to this cupboard", null: false
+	field :stocks, [Types::StockType], "The stock in this cupboard", null: true
+	field :location, String, null: true
+	field :created_at, String, null: false
+	field :updated_at, String, null: false
+	field :hidden, Boolean, null: true
+	field :setup, Boolean, null: true
+	field :communal, Boolean, null: true
+	field :stocks, [Types::StockType], "The stock in this cupboard", null: false
+end

app/graphql/types/date.rb

@@ -0,0 +1,20 @@
+# app/graphql/types/date.rb
+class Types::Date < Types::BaseScalar
+  description "A valid Date, transported as a DateTime"
+
+  def self.coerce_input(input_value, context)
+    # Parse the incoming object into a `DateTime`
+    date = input_value.to_datetime
+    if date.class.to_s == 'DateTime'
+      # It's valid, return the date object
+      date
+    else
+      raise GraphQL::CoercionError, "#{input_value.inspect} is not a valid DateTime"
+    end
+  end
+
+  def self.coerce_result(ruby_value, context)
+    # It's transported as a string, so stringify it
+    ruby_value.to_date.to_s(:long)
+  end
+end

app/graphql/types/days_from_now.rb

@@ -0,0 +1,21 @@
+require 'action_view'
+include ActionView::Helpers::DateHelper
+
+# app/graphql/types/days_from_now.rb
+class Types::DaysFromNow < Types::BaseScalar
+  description "Numbers of days from now, transported as a descriptive String"
+
+  def self.coerce_input(input_value, context)
+		input_value
+  end
+
+  def self.coerce_result(ruby_value, context)
+		# It's transported as a string, so stringify it
+		# days_from_now = distance_of_time_in_words(Time.zone.now, ruby_value) + (ruby_value <= Time.zone.now ? ' ago': '')
+		if ruby_value.class.to_s == "Date"
+			days_from_now = ruby_value - Date.current
+		else
+			days_from_now = ruby_value.to_date - Date.current
+		end
+  end
+end

app/graphql/types/ingredient_type.rb

@@ -0,0 +1,15 @@
+class Types::IngredientType < Types::BaseObject
+	field :id, ID, null: false
+	field :stocks, [Types::StockType], "The stocks for this ingredient", null: true
+	field :created_at, GraphQL::Types::ISO8601DateTime, null: false
+	field :updated_at, GraphQL::Types::ISO8601DateTime, null: false
+	field :name, String, null: false
+	field :vegan, Boolean, null: false
+	field :vegetarian, Boolean, null: false
+	field :gluten_free, Boolean, null: false
+	field :dairy_free, Boolean, null: false
+	field :kosher, Boolean, null: false
+end
+
+# field :portions, [Types::PortionType], "The portions for this ingredient", null: true
+# field :recipes, [Types::RecipeType], "The stocks for this ingredient", null: true

app/graphql/types/mutation_type.rb

@@ -0,0 +1,10 @@
+module Types
+  class MutationType < Types::BaseObject
+    # TODO: remove me
+    field :test_field, String, null: false,
+      description: "An example field added by the generator"
+    def test_field
+      "Hello World"
+    end
+  end
+end

app/graphql/types/portion_type.rb

@@ -0,0 +1,11 @@
+class Types::PortionType < Types::BaseObject
+	field :id, ID, null: false
+	field :recipe, Types::RecipeType, "The recipe this portion is within", null: false
+	field :unit, Types::UnitType, "The unit for this stock", null: false
+	field :use_by_date, Types::Date, null: false
+	field :amount, Float, null: false
+	field :created_at, GraphQL::Types::ISO8601DateTime, null: false
+	field :updated_at, GraphQL::Types::ISO8601DateTime, null: false
+	field :hidden, Boolean, null: false
+	field :always_available, Boolean, null: false
+end

app/graphql/types/query_type.rb

@@ -0,0 +1,34 @@
+module Types
+  class QueryType < Types::BaseObject
+    # Add root-level fields here.
+    # They will be entry points for queries on your schema.
+
+    field :recipes, [RecipeType], null: true do
+      description "A group of all recipes"
+      argument :limit, Integer, required: false
+    end
+
+    field :user_fav_stock, [UserFavStockType], null: true do
+      description "A group of user favourite stock - aka quick add stock"
+      argument :user_id, Integer, required: true
+    end
+
+    field :cupboards_from_user_id, [CupboardType], null: true do
+      description "A collection of cupboards from a user id"
+      argument :user_id, Integer, required: true
+      argument :limit, Integer, required: false
+    end
+
+    def recipes(limit: 4)
+      Recipe.all.limit(limit)
+    end
+
+    def user_fav_stock(user_id: nil)
+      UserFavStock.where(user_id: user_id)
+    end
+
+    def cupboards_from_user_id(user_id: nil, limit: 4)
+      Cupboard.where(id: CupboardUser.where(user_id: user_id, accepted: true).map{|cu| cu.cupboard.id unless cu.cupboard.setup == true || cu.cupboard.hidden == true }.compact).order(created_at: :desc).limit(limit)
+    end
+  end
+end

app/graphql/types/recipe_type.rb

@@ -0,0 +1,16 @@
+class Types::RecipeType < Types::BaseObject
+	field :id, ID, null: false
+	field :title, String, null: true
+	field :description, String, null: true
+	field :cuisine, String, null: true
+	field :prep_time, String, null: true
+	field :cook_time, String, null: true
+	field :yield, String, null: true
+	field :public, Boolean, null: false
+	field :show_users_name, Boolean, null: true
+	field :user, Types::UserType, "The creator of this recipe", null: false
+	field :live, Boolean, null: true
+	field :created_at, GraphQL::Types::ISO8601DateTime, null: true
+	field :updated_at, GraphQL::Types::ISO8601DateTime, null: true
+	field :note, String, null: true
+end

app/graphql/types/stock_type.rb

@@ -0,0 +1,14 @@
+class Types::StockType < Types::BaseObject
+	field :id, ID, null: false
+	field :cupboard, Types::CupboardType, "The cupboard this stock is within", null: false
+	field :ingredient, Types::IngredientType, "The ingredient for this stock", null: false
+	field :users, [Types::UserType], "The user this stock belongs to", null: false
+	field :unit, Types::UnitType, "The unit for this stock", null: false
+	# field :use_by_date, Types::Date, null: false
+	field :use_by_date, Types::DaysFromNow, null: false
+	field :amount, Float, null: false
+	field :created_at, GraphQL::Types::ISO8601DateTime, null: false
+	field :updated_at, GraphQL::Types::ISO8601DateTime, null: false
+	field :hidden, Boolean, null: false
+	field :always_available, Boolean, null: false
+end

app/graphql/types/unit_type.rb

@@ -0,0 +1,10 @@
+class Types::UnitType < Types::BaseObject
+	field :id, ID, null: false
+	field :unit_number, Integer, null: true
+	field :name, String, null: true
+	field :short_name, String, null: true
+	field :unit_type, String, null: true
+	field :metric_ratio, Float, null: true
+	field :created_at, GraphQL::Types::ISO8601DateTime, null: true
+	field :updated_at, GraphQL::Types::ISO8601DateTime, null: true
+end

app/graphql/types/user_fav_stock_type.rb

@@ -0,0 +1,10 @@
+class Types::UserFavStockType < Types::BaseObject
+	field :id, ID, null: false
+	field :ingredient, Types::IngredientType, "The ingredient in this User Fav Stock", null: false
+	field :unit, Types::UnitType, "The unit for this User Fav Stock", null: false
+	field :user, Types::UserType, "The user this user fav stock belongs to", null: false
+	field :stock_amount, Integer, null: true
+	field :standard_use_by_limit, Integer, null: true
+	field :created_at, GraphQL::Types::ISO8601DateTime, null: false
+	field :updated_at, GraphQL::Types::ISO8601DateTime, null: false
+end

app/graphql/types/user_type.rb

@@ -0,0 +1,16 @@
+class Types::UserType < Types::BaseObject
+	field :id, ID, null: true
+	field :name, String, null: true
+	field :email, String, null: true
+	field :created_at, GraphQL::Types::ISO8601DateTime, null: true
+	field :updated_at, GraphQL::Types::ISO8601DateTime, null: true
+	field :password_digest, String, null: true
+	field :remember_digest, String, null: true
+	field :admin, Boolean, null: true
+	field :activation_digest, String, null: true
+	field :activated, Boolean, null: true
+	field :activated_at, GraphQL::Types::ISO8601DateTime, null: true
+	field :reset_digest, String, null: true
+	field :reset_sent_at, GraphQL::Types::ISO8601DateTime, null: true
+	field :demo, Boolean, null: true
+end

app/models/portion.rb

@@ -1,17 +1,12 @@
 class Portion < ApplicationRecord
   belongs_to :recipe
   belongs_to :ingredient
-  has_one :unit, through: :ingredient
-
-  accepts_nested_attributes_for :ingredient,
-                                :reject_if => :all_blank
-  accepts_nested_attributes_for :unit
+  belongs_to :unit
 
   validates :amount, presence: true
   validates_numericality_of :amount, on: :create
 	validates :ingredient_id, presence: true
-	validates :unit_number, presence: true
-
+	validates :unit_id, presence: true
 
 
   def quantity

app/models/unit.rb

@@ -1,11 +1,6 @@
 class Unit < ApplicationRecord
   has_many :ingredients
-  has_many :portions, through: :ingredients
+  has_one :portion
   has_one :stock
   has_one :user_fav_stock
-
-  accepts_nested_attributes_for :portions,
-  :reject_if => :all_blank,
-  :allow_destroy => true
-  accepts_nested_attributes_for :ingredients
 end

config/routes.rb

@@ -1,4 +1,9 @@
 Rails.application.routes.draw do
+  if Rails.env.development?
+    mount GraphiQL::Rails::Engine, at: "/graphiql", graphql_path: "/graphql"
+  end
+
+  post "/graphql", to: "graphql#execute"
   match '/404', :to => 'errors#not_found', :via => :all
   match '/500', :to => 'errors#internal_server_error', :via => :all
   root 'static_pages#home'

db/migrate/20190318224128_rename_unit_number_to_unit_id_for_portions.rb

@@ -0,0 +1,5 @@
+class RenameUnitNumberToUnitIdForPortions < ActiveRecord::Migration[5.1]
+  def change
+    rename_column :portions, :unit_number, :unit_id
+  end
+end