Introduction to GraphQL with Ruby
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The document introduces GraphQL in Ruby, outlining its key concepts such as fetch methods, query language, and server specifications. It discusses the creation of reusable and custom endpoints in a Rails application while highlighting different types and fields involved in GraphQL. Additionally, it mentions the downsides of GraphQL, including potential performance issues and security considerations.
Introduction to GraphQL with Ruby
- 1. Introduction to GraphQL in Ruby Amr Abdelwahab
- 4. How do we currently fetch data? What is GraphQL? Demo Downsides Outline
- 5. A simple UI component
- 6. What data do we need here?
- 11. ● That will expose HREFs of the products ● Fetch the product resources ● Every product resource will expose Hrefs to the product image /cart/:id Reusable Endpoints (REST)
- 13. ● Deeper Nesting? ● Field selection? /cart/:id?expand=products Reusable Endpoints (REST)
- 14. ● What is the convention? /cart/:id?fields=products(name, description, price) Reusable Endpoints (REST)
- 17. Custom Endpoints
- 24. Custom Endpoints Client ● Updates a view ● Creates a new view ● New view version Server ● Updates the endpoint ● Creates a new Endpoint
- 25. What is GraphQL?
- 26. What is NOT GraphQL?
- 27. What is NOT GraphQL? ● Not a database ● Not a library to install ● Not a language specific
- 28. What is GraphQL? ● A query language ○ Data shapes Not Resources ○ Client specified ● A server specs ○ How a server lexes, parses and executes a query?
- 29. Post /graphql
- 30. Post /graphql
- 31. Demo Definition ● Shop(id) ○ Fetch all fields with children products ● product(id) ○ Fetch all fields with product image ● Create a new shop
- 32. Types, fields and arguments
- 33. Types ● Describes a value in the system ● Built in scalar types ● Custom types ○ Object types ○ Custom scalar types ○ Enum types ○ Interface or Union types ○ List types
- 34. Types Example
- 35. Types Example
- 36. Fields and arguments ● Fields are like a function ○ They accept arguments ○ They have a return type
- 37. Types Example
- 49. Project configuration ● Normal rails 5 application ● Add graphql-ruby gem ● rails generate graphql:install ○ Set up a folder structure in app/graphql/ ○ Add schema definition ○ Add a Query type definition ○ Add a route and controller for executing queries ○ Install graphiql-rails
- 57. Query type
- 58. Query type
- 59. Query type
- 61. Query type
- 62. Query type
- 63. Shop Query field
- 64. Shop Query field
- 65. Shop Query field
- 66. Shop Query field
- 68. Shop Query field
- 69. Shop Query field
- 70. Shop Query field
- 71. Shop Type
- 72. Shop Type
- 74. Shop Type
- 76. Shop Type
- 77. Shop Type
- 78. Product Type
- 79. Product Type
- 81. Product Type
- 83. Product Type
- 84. Product Type
- 89. Mutations
- 99. Mutation type
- 100. Mutation type
- 102. Mutation type
- 103. Mutation type
- 104. Create shop mutation
- 105. Create shop mutation
- 106. Create shop mutation
- 107. Create shop mutation
- 108. Create shop mutation
- 110. Create shop mutation
- 111. Principles ● Hierarchical ● Product centric ● Strongly typed ● Client-specified queries ● Introspective ● Version free
- 112. Introspection
- 113. Introspection ● Auto Documentation ● Client side validations ● IDE integrations
- 114. Downsides
- 115. Downsides ● N + 1 queries ● Http Caching ● Security
- 117. E-MAIL info@digitalnatives.hu job@digitalnatives.hu PHONE +36 30 208 5625 ADDRESS Andrássy út 66. Budapest, H-1062 Digital Natives Ltd.