[Bug] Null is being populated as a String if MariaDB used

[pedja1982]

Bug report

What I did

I create a model and table in DevTools that contains a nullable field, and when I open the create form in CRUD, I get the default value "NULL" as a "STRING" instead of an empty field.

What I expected to happen

I expect the input to be empty (value='').

What happened

I am getting the value NULL as a string (value='NULL').

What I've already tried to fix it

We have a datetime field in the database that is nullable. When I went to create, the datepicker didn't work—it didn't show up at all until I set ->value('') to empty in the datetime_picker. That's how we solved the issue of getting the datepicker to work, because if "null" stays as a string, it throws an error since it can't parse the date (Uncaught TypeError: defaultDate() Could not parse date parameter: NaN). However, it's not right that we have to manually remove the string "null" from every input field that is nullable in the database.

Is it a bug in the latest version of Backpack?

After I run composer update backpack/crud the bug... is it still there? YES

Backpack, Laravel, PHP, DB version

When I run php artisan backpack:version the output is:

8.2.22

### PHP EXTENSIONS:

Core, date, libxml, openssl, pcre, sqlite3, zlib, bz2, calendar, ctype, curl, hash, filter, ftp, gettext, json, iconv, SPL, pcntl, random, readline, Reflection, session, standard, mbstring, shmop, SimpleXML, tokenizer, xml, i360, dom, fileinfo, gd, gmp, grpc, intl, exif, PDO, mysqlnd, mysqli, pdo_mysql, pdo_sqlite, Phar, posix, xmlreader, xmlwriter, xsl, zip, ionCube Loader

### LARAVEL VERSION:
11.23.5.0

### BACKPACK PACKAGE VERSIONS:
backpack/basset: 1.3.6
backpack/crud: 6.7.34
backpack/devtools: 3.1.6
backpack/editable-columns: 3.0.10
backpack/generators: v4.0.6
backpack/pro: 2.2.16
backpack/theme-tabler: 1.2.13```

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[karandatwani92]

Hey @pedja1982

I'm unable to reproduce the issue.

Can you recheck on your end? If the problem continues, please let me know the steps to reproduce it.

[AdamovicBoban]

Hey @karandatwani92 @pedja1982 ,

The problem is with the database server. On MySQL it works, but on MariaDB, "NULL" appears in the input field if the field is nullable in the database. Confirmed!

I have that bug as well, but so far I haven't found a solution other than not using MariaDB.

MARIADB - 10.6.18-MariaDB-cll-lve - MariaDB Server

MYSQL - 8.0.39-cll-lve - MySQL Community Server - GPL

@tabacitu Please confirm this bug and find a solution.

[airtightdesign]

Mariadb 10.2.7 and later quote literals to distinguish them from expressions

Default value for the column. Literals are quoted to distinguish them from expressions. NULL means that the column has no default. In MariaDB 10.2.6 and earlier, no quotes were used for any type of default and NULL can either mean that there is no default, or that the default column value is NULL.

• https://mariadb.com/kb/en/information-schema-columns-table/