Architecting scalable serverless web apps with GraphQL api
Developer Advocate
Web / Mobile / VR / AR / IoT
GDE, author, consultant
What is GraphQL
RESTfull API
The core idea is to have a URL for every resource
Description of resource is coupled to implementation
Overfetching
Underfetching
chaining requests to server to get needed data
GraphQL
A query language for your API
GraphQL
What is Hasura
open source and free engine that gives you auto-generates real-time GraphQL API on top of new or existing Postgres database
Features
- Can be deployed to any cloud or run locally
- Compatible with all Authentication solutions
- Can run on top of new or existing Postgres database
- Supports Postgres addons (PostGIS, TimescaleDB)
- Auto-generates GraphQL api
- GraphQL queries are compiled to performant SQL statements using native Postgres features
Features
- Comes with hasura-cli which has awesome tools like migrations and more
- Can work with custom SQL statements
- Has configurable access controls for data
- Can be connected to your own GraphQL server (does schema stitching)
- Has eventing system which enables to trigger serverless functions
How to get started?
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Go to hasura.io
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Click on Get started with Heroku
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Click on
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Enter your app name
Let's see it in action
Hasura Console overview
Hasura Console overview
- GraphiQL - run your queries in in-browser IDE
- Data - manage your data, access control, relations, permissions
- Remote Schemas - stitch GraphQL schema of your custom GraphQL server
- Event Triggers - connect your serverless functions
GraphiQL tab - use for development
- Set endpoint headers
- Execute queries and mutations
- Analyse queries
Data tab - data management interface
- View and insert data into db
- create and modify tables
- Create relationships
- set permissions and access control
- execute custom sql statements
Remote Schemas tab
stitch your custom GraphQL server schema
Event triggers
- connect custom webhooks to database events to execute serverless functions
- set retry logic
- forward custom headers to webhook
Authentication
Run hasura locally on top of existing postgres
{ Show me some code }!
Thank You
@VladimirNovick