[NFR] Added json dataType support for MySQL dialect.

[zGaron]

Hello!

instead of PR #13216

• Type: new feature
• Link to issue: Fetaure request: describeColumns : json #12546, adding type_json support for mysql dialect #12985, phalcon 3.2不支持mysql的json类型 #13214

• I have read and understood the Contributing Guidelines
• I have checked that another pull request for this purpose does not exist.
• I wrote some tests for this PR.

Small description of change:

Thanks

[zGaron]

MySQL version >= 5.7. = =!

[jellisii]

Is this expected for 3.3.2, or will it be in 4.x?

[sergeyklay]

I apologize @zGaron for completely overlooking this. Thank you for the PR. Could you please send this PR to the 4.0.x branch? And again I am sorry about the delay.

[virgofx]

To clarify --- does this mean one can bind native PHP arrays that automatically get transformed into or from JSON at the DB layer? e.g. does the following work? This is what I would expect: ( I didn't see any code changes or tests that would test this?)

/**
 * @var array
 * @Column(type='json')
 */
protected $json;

$model->setJson([ 'arrayOf' => 'data' ]);
$model->save();

DB

+----+--------------------+
| id | json               |
+----+--------------------+
| 1  | {"arrayOf":"data"} |
+----+--------------------+

[sergeyklay]

@virgofx I think so

[virgofx]

I believe Since PDO doesn't bind native JSON ... I would think somewhere in the Phalcon PHQL/database layer I was expecting to see json_encode()/json_decode() just prior to save --- I didn't see that ... At least a test to outline above showing that it works would also be good.

[benfavre]

This should be on the top of all lists.

[niden]

@virgofx I don't think that there is an automatic conversion towards a JSON column from PHP.

JSON columns in MySQL/MariaDB are pretty much storing text or a string. They do however have an internal mechanism that checks the syntax of the JSON string and throws an exception when you try to update it.

@zGaron would you be so kind as to rebase this and send it to the 4.0.x branch?

Thank you

[niden]

Addressed in #13562