boldtrn/jsonb-bundle

A library adding the support for JSONB columns of PostgreSQL to Doctrine.

JsonbBundle

Doctrine implemented the jsonb datatype with Doctrine DBAL 2.6. I recommend using the official Doctrine implementation. If you cannot upgrade feel free to use this bundle. It still works for me in my current production setting. I will upgrade to the doctrine implementation at some point in time, as well. Doctrine Mapping Matrix, _(*1)

This bundle extends Doctrine to use the jsonb datatype that ships with Postgresql 9.4. This bundle is fully compatible with Symfony, but you do not have to use Symfony (see the composer.json for dependencies). Please make sure you have Postgresql with a version of at least 9.4 installed before using this bundle. The Bundle allows to create Jsonb fields and use the @>,? and the #>> operator on the Jsonb field. Other Operations can be easily added., _(*2)

I recently discovered the power of NativeQueries (http://doctrine-orm.readthedocs.org/en/latest/reference/native-sql.html). Right now I only use NativeQueries when querying. An example is shown below., _(*3)

, _(*4)

Installation

Step 1: Download the Bundle

Open a command console, enter your project directory and execute the following command to download the latest stable version of this bundle:, _(*5)

$ composer require "boldtrn/jsonb-bundle:~1.1"

Step 2: Add the new Types and Functions to the Config

# config.yml
doctrine:
    dbal:
        types:
          jsonb: Boldtrn\JsonbBundle\Types\JsonbArrayType
        mapping_types:
          jsonb: jsonb
    orm:
        dql:
            string_functions:
                JSONB_AG:   Boldtrn\JsonbBundle\Query\JsonbAtGreater
                JSONB_HGG:  Boldtrn\JsonbBundle\Query\JsonbHashGreaterGreater
                JSONB_EX:   Boldtrn\JsonbBundle\Query\JsonbExistence

Note: There were people having issues with the above configuration. They had the following exception:, _(*6)

[Symfony\Component\Config\Definition\Exception\InvalidConfigurationException]  
  Unrecognized options "dql" under "doctrine.orm" 

This was fixed by changing the dql part in the following (add the entity_managers between orm and dql):, _(*7)

doctrine:
    orm:
        entity_managers:
            dql:

Step 3: Create a Entity and Use the Jsonb Type

/**
 * @Entity
 */
class Test
{

    /**
     * @Id
     * @Column(type="string")
     * @GeneratedValue
     */
    public $id;

    /**
     * @Column(type="jsonb")
     *
     * Usually attrs is an array, depends on you
     *
     */
    public $attrs = array();

}

Step 4.1: Write a Repository Method using a NativeQuery

$q = $this
            ->entityManager
            ->createNativeQuery(
                "
        SELECT t.id, t.attrs
        FROM Test t
        WHERE t.attrs @> 'value'
        "
            , $rsm);

You only need to setup the $rsm ResultSetMapping according to the Doctrine documentation., _(*8)

Step 4.2: Write a Repository Method that queries for the jsonb using the custom JSONB_FUNCTIONS

This example shows how to use the contains statement in a WHERE clause. The = TRUE is a workaround for Doctrine that needs an comparison operator in the WHERE clause., _(*9)

$q = $this
            ->entityManager
            ->createQuery(
                "
        SELECT t
        FROM E:Test t
        WHERE JSONB_AG(t.attrs, 'value') = TRUE
        "
            );

This produces the following Query:, _(*10)

SELECT t0_.id AS id0, t0_.attrs AS attrs1 FROM Test t0_ WHERE (t0_.attrs @> 'value') = true

This example shows how to query for a value that is LIKE %d% The result could be data like: id | attrs ----+-------------------------------------- 4 | {"a": 1, "b": {"c": "abcdefg", "e": true}}, _(*11)

        $q = $this
            ->entityManager
            ->createQuery(
                "
        SELECT t
        FROM E:Test t
        WHERE JSONB_HGG(t.attrs , '{\"b\",\"c\"}') LIKE '%d%'
        "
            );

This produces the following Query:, _(*12)

SELECT t0_.id AS id0, t0_.attrs AS attrs1 FROM Test t0_ WHERE (t0_.attrs #>> '{\"object1\",\"object2\"}') LIKE '%a%'

Further Information

The ? operator is implemented by calling its function jsonb_exists(column_name, value) since Doctrine will consider it a parameter placeholder otherwise. The same must be done if you want to implement ?| and ?& operators, using jsonb_exists_any(column_name, value) and jsonb_exists_all(column_name, value) respectively, _(*13)