shared-arguments

Ruby gem for GraphQL arguments sharing within fields

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Contents

• Description
• Installation
• Setup
• Sample use case

Description

Sometimes you want to use the same arguments for multiple fields in custom object type. To avoid repeating those declarations and DRY-up your schema, I introduce you shared_arguments field.

This gem is mostly usable when you have:

• many fields with few repeating arguments
• few fields with many repeating arguments
• many fields with many repeating arguments

Installation

gem install shared-arguments

Setup

Include SharedArguments in your schema

#graphql/your_schema.rb

YourSchema = GraphQL::Schema.define do
  use GraphQL::SharedArguments.new
end

Sample use case

#graphql/types/analytics_type.rb

Types::AnalyticsType = GraphQL::ObjectType.define do
    name 'Analytics'

    field :invoices, types.[Types::Invoice] do
       argument :from, !Types::DateType
       argument :to, !Types::DateType
       argument :companyID, types.ID
    end

    field :registeredUsers, types.[Types::User] do
       argument :from, !Types::DateType
       argument :to, !Types::DateType
       argument :companyID, types.ID
    end

    field :downloadsAmount, types.Int do
       argument :from, !Types::DateType
       argument :to, !Types::DateType
       argument :userAmount, types.ID
    end
end

This can be shortened like in below example

#graphql/types/analytics_type.rb

Types::AnalyticsType = GraphQL::ObjectType.define do
    name 'Analytics'

    field :invoices, types.[Types::Invoice]

    field :registeredUsers, types.[Types::User]

    field :downloadsAmount, types.Int do
       argument :userAmount, types.ID
    end

    shared_arguments do
       argument :from, !Types::DateType
       argument :to, !Types::DateType
    end

    shared_arguments except: %i(downloadsAmount) do
       argument :companyID, types.ID
    end
end

shared_arguments field takes both except and only keyword with array of symbols so you can omit or select specified fields.

Any contributions/suggestions/opened issues are welcomed.

License: MIT