[5.2] Added correct MySQL JSON bool handling and updating grammar

[sebwas]

Bool literals are now correctly inserted into statements that use a JSON column. E.g.

DB::table('test')->select('flags', 'another_column')->where('flags->active', true)->get();

Previously this was only possible using DB::raw('true').

Additionally the update grammar has been updated, so that JSON fields in the update array are recognized as such and make use of the JSON_SET function.

See code and tests for details and also see #13232 for the discussion to the where issue.

[GrahamCampbell]

Wasn't this already added to 5.3?

[sebwas]

If so, could you point out where?

[GrahamCampbell]

Can't remember., Maybe it wasn't merged?

[taylorotwell]

Merged, but have seen after the fact it doesn't seem to work for me at all. Boolean columns are not updated. No error is generated. Just nothing happens.

[taylorotwell]

Looks to me like bindings for booleans aren't removed on update. So you end up with this kind of query: http://d.pr/i/1gvcH

Note that there are more bindings than placeholders.

[taylorotwell]

I fixed the JSON updates with booleans.

[taylorotwell]

Can you add a test so it doesn't break again?

[sebwas]

Alright. I will do so in a bit. Cheers!