https://github.com/mnesarco/hasura-pg-actions

Short script to enable hasura to call postgresql functions (read/write) as mutations
https://github.com/mnesarco/hasura-pg-actions

hasura

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Short script to enable hasura to call postgresql functions (read/write) as mutations

• Host: GitHub
• URL: https://github.com/mnesarco/hasura-pg-actions
• Owner: mnesarco
• Created: 2020-02-27T15:02:40.000Z (almost 5 years ago)
• Default Branch: master
• Last Pushed: 2020-02-27T18:46:52.000Z (almost 5 years ago)
• Last Synced: 2024-09-04T00:04:45.821Z (3 months ago)
• Topics: hasura
• Language: PLpgSQL
• Homepage:
• Size: 3.91 KB
• Stars: 16
• Watchers: 3
• Forks: 4
• Open Issues: 0
• Metadata Files:
  • Readme: README.md

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README

        
# hasura-pg-actions

Short script to enable hasura to call postgresql functions (read/write) as mutations.

Please read the reference article: https://mnesarco.github.io/blog/2020/02/25/hasura-postgresql-function-as-mutation

## Map mutations:

```graphql

mutation CallPgAction {

  insert_hpga_action_journal(

    objects: {

        action_id: "test", 

        request: { greeting: "Hello " }

    }) {

    returning {

      response

    }

  }

}

```

## To PostgreSQL functions:

```sql

CREATE OR REPLACE FUNCTION action_test(id bigint, org text, usr text, request jsonb)

RETURNS jsonb AS $func$

DECLARE 

    result jsonb;

BEGIN

    -- You can do write operations

    CREATE TABLE my_dummy_table ( id integer not null primary key, greeting text );

    INSERT INTO my_dummy_table (id,greeting)

        SELECT x.id, request->>'greeting' || ' ' || x.id

        FROM (SELECT * FROM generate_series(1,10) as id) x;

    -- You can return any jsonb object

    SELECT jsonb_agg(t) INTO result 

    FROM my_dummy_table t;

    -- Clean

    DROP TABLE my_dummy_table;

    RETURN result;

END;

$func$

LANGUAGE plpgsql VOLATILE;

```

## A picture is worth a thousand words

![ref](https://mnesarco.github.io/images/hasura-action-pg.png)