graphile-build-pg v4.13.0
graphile-build-pg
graphile-build-pg
is a collection of plugins for graphile-build
that allow
you to extend your GraphQL schema with high-performance types and fields based
on resources found in your PostgreSQL database schema.
The plugins here-in do not exhibit the N+1 query problem common in many
database-based GraphQL APIs thanks to graphile-build's advanced
look-ahead features,
they're more efficient, even, than DataLoader
-based solutions.
An example of an application built on graphile-build-pg
is PostGraphile
v4+ which allows you to run just
one command to instantly get a fully working and secure GraphQL API up and
running based on your PostgreSQL database schema.
It is recommended that you use PostGraphile directly unless you really want to get low level access to this library.
If you prefer to use the plugins yourself it's advised that you use the
defaultPlugins
export from graphile-build-pg
and then create a new array
based on that into which you may insert or remove specific plugins. This is
because it is ordered in a way to ensure the plugins work correctly (and we may
still split up or restructure the plugins within it).
defaultPlugins
An array of graphql-build plugins in the correct order to generate a
well-thought-out GraphQL object tree based on your PostgreSQL schema. This is
the array that postgraphile-core
uses.
inflections
This is a list of inflection engines, we currently have the following:
defaultInflection
- a sensible defaultpostGraphileInflection
- as above, but enums get converted toCONSTANT_CASE
postGraphileClassicIdsInflection
- as above, butid
attributes get renamed torowId
to prevent conflicts withid
from the Relay Global Unique Object Specification.
Manual usage
import { defaultPlugins, getBuilder } from "graphile-build";
import {
defaultPlugins as pgDefaultPlugins,
inflections: {
defaultInflection,
},
} from "graphile-build-pg";
async function getSchema(pgConfig = process.env.DATABASE_URL, pgSchemas = ['public'], additionalPlugins = []) {
return getBuilder(
[
...defaultPlugins,
...pgDefaultPlugins,
...additionalPlugins
],
{
pgConfig,
pgSchemas,
pgExtendedTypes: true,
pgInflection: defaultInflection,
}
);
}
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