ra-postgraphile

Postgraphile client for react-admin

Typescript API: https://bowlingx.github.io/ra-postgraphile/

Install

$ yarn add ra-postgraphile / npm install ra-postgraphile --save

Usage

The ra-postgraphile data provider accepts 2 arguments:

• client - The ApolloClient instance to use.

• config - optional configuration

  pgDataProvider(client, [config])

The following examples shows the basic usage:

import React, { useEffect, useState } from 'react'
import { Admin, Resource } from 'react-admin'
import { useApolloClient } from '@apollo/react-hooks'
import pgDataProvider from 'ra-postgraphile'
import { PostList, PostEdit, PostCreate } from './posts'
import { CommentList, CommentEdit, CommentCreate } from './posts'

const App = () => {
  const [dataProvider, setDataProvider] = useState(null)
  const client = useApolloClient()

  useEffect(() => {
    ;(async () => {
      const dataProvider = await pgDataProvider(client)
      setDataProvider(() => dataProvider)
    })()
  }, [])

  return (
    dataProvider && (
      <Admin dataProvider={dataProvider} layout={Layout}>
        <Resource name="Posts" list={PostList} edit={PostEdit} create={PostCreate} />
        <Resource name="Comments" list={CommentList} create={CommentCreate} edit={CommentEdit} />
      </Admin>
    )
  )
}

export default App

Limitations

The project has been tested only with the following plugins enabled on postgraphile: There is limited support for the postgis plugin and not all input/query types are properly mapped.

const PgSimplifyInflectorPlugin = require('@graphile-contrib/pg-simplify-inflector')
const PgConnectionFilterPlugin = require('postgraphile-plugin-connection-filter')

Please see src/__test_utils/QueryRunner.ts for a minimal example setup.

For full-text search capabilities, the following plugin is also required:

const PostGraphileFulltextFilterPlugin = require('postgraphile-plugin-fulltext-filter')

Configuration

You can pass an optional configuration object:

const pgDataProviderConfig: ProviderOptions = {
  typeMap: {
    YourType: {
      expand: true,
    },
  },
}

• typeMap - allows you to configure complex types and how they should be handled. Please see (src/defaultTypeConfig.ts) for a default mapping. Your config will be merged with the defaults.

TypeConfig options

The following can be configured

Option	Signature	Description
queryValueToInputValue	(value: any ) => any	Allows you to map the value if used as an input type for mutations. Some values might not convert 1:1 if returned from the query and used as an input
excludeFields	string[] or ((fieldName: string, queryFetchType: FetchQueryType) => boolean)	Allows you to exclude certain fields, either by passing an array (e.g. ['field1', 'field2']) or a function
includeFields	string[] or ((fieldName: string, queryFetchType: FetchQueryType) => boolean)	Same as exclude fields, but if provided will let you dynamically decide if a field is queried.
computeArgumentsForField	(fieldName: string, args: ReadonlyArray<IntrospectionInputValue> ) => Record< string, any> or null	Allows you to dynamically provide arguments for a given field
expand	boolean	If true, will expand this type and query subfields

Please see (src/types.ts) for detailed types of TypeConfig.

Apollo client

Both version 2.x and 3.x of apollo client are supported (because you provide the instance). The current 4.x version of this library depends on apollo-client 2.x, so you will get typescript errors. To resolve that you have to cast to any:

Example:

// ..
// fix for apollo-client v3
const dataProvider = await createDataProvider(client as any /** other options **/)
// ..

Version 5 will depend on @apollo/client 3.x.

Supported concepts

ra-postgraphile works on graphql types that are exposed by postgraphile. We currently support the following constructs to query data:

• Tables
• Views
• Functions with custom return type.

Please see here for an example schema.

Primary Keys

react-admin requires each resource to be identified by a unique id. If your resource does not have an id field, we will use the generated nodeId from your primaryKey. All types processed by ra-postgraphile require a primary key.

Contribution

• Contribution is very welcome :).
• Please create your commit messages based on semantic-release syntax and semantics (e.g. properly mark Breaking changes etc.). This let's us automatically create release notes and releases to NPM.

Development

We are using yarn for package management.

To run all tests you have to start the dependent postgres container with docker-compose up -d.