PostGraphQL
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This document discusses PostGraphQL, which allows automatically generating a GraphQL API from a PostgreSQL database schema without writing any code. It describes how PostGraphQL can define the data model in PostgreSQL, handle permissions, generate CRUD operations and mutations, and connect to a PostgreSQL database. It also mentions how PostGraphQL supports features like pagination, sorting, access control, and computed properties through PostgreSQL functions.
PostGraphQL
- 1. PostGraphQL Creating a Relay compatible GraphQL server without a line of coding
- 2. PostGraphQL or why the shift key has become the most used key on my keyboard
- 6. GET /articles GET /articles/123 PUT /articles
- 7. GET /articles GET /articles/123 PUT /articles
- 8. GET /articles GET /articles/123 PUT /articles GET /authors/abc
- 9. GET /articles GET /articles/123 PUT /articles GET /authors/abc PUT /subscriptions/tag
- 10. GET /articles GET /articles/123 PUT /articles GET /authors/abc PUT /subscriptions/tag GET /articles?version=mobile
- 11. GET /articles GET /articles/123 PUT /articles GET /authors/abc PUT /subscriptions/tag GET /articles?version=mobile
- 12. client defined queries per field access control pagable connections predictable mutations
- 13. define data-model not custom views define permissions not protected routes define cursors not custom pagination standardised mutations not individual CRUD operations
- 15. postgraphql
- 17. A GraphQL schema created by reflection over a PostgreSQL schema
- 18. define your data graph in postgres define your business logic in postgres define your access control in postgres
- 22. id title article1 Reederei Rickmers kündigt… id article_id author_id 1 article1 author1 2 article1 author2 id name author1 Daniel author2 Marc
- 23. ready for take off
- 24. PostGraphQL server listening on port 5000 🚀 ‣ Connected to Postgres instance postgres://localhost:5432 ‣ Introspected Postgres schema(s) public ‣ GraphQL endpoint served at http://localhost:5000/graphql ‣ GraphiQL endpoint served at http://localhost:5000/graphiql postgraphql --watch yarn global add postgraphql
- 27. mutations auto generated delete, update and create mutations for all tables custom mutations possible relay compatible
- 28. demo
- 29. access control
- 31. limited access client API database full access
- 32. CREATE ROLE 'viewer'; GRANT SELECT ON articles TO viewer;
- 33. CREATE ROLE 'editor'; GRANT ALL ON articles TO editor; CREATE ROLE 'viewer'; GRANT SELECT ON articles TO viewer;
- 34. limited access client API database scoped access
- 35. Header JWT { aud: 'postgraphql', role: 'editor' } mutation { createArticle(…) { article { … } } } Body GraphQL query
- 36. query { allArticles { nodes { … } } } Body GraphQL query defaultRole = 'viewer'
- 37. CREATE ROLE 'editor'; GRANT ALL ON articles TO editor; CREATE ROLE 'viewer'; GRANT SELECT ON articles TO viewer;
- 38. id title status 1 Reederei Rickmers kündigt… PUBLISHED 2 Trump will Entscheidung… DRAFT 3 Protest gegen Abschiebung… DEPUBLISHED 4 FC Bayern wird Deutscher… SCHEDULED
- 39. SET row_security = on; CREATE POLICY published ON articles FOR SELECT TO viewer USING status = 'PUBLISHED';
- 41. { article { id: '123' shareURL: 'https://br24.de/123' } }
- 42. CREATE FUNCTION article_share_url(article articles) as $$ SELECT 'https://br24.de/' || article.id; $$ LANGUAGE SQL STABLE;
- 43. { searchArticles(term: "Merkel") { edges { node { title } } } }
- 44. demo
- 46. JSON support event triggers full text search geospatial information