This motherfucker tried to fuck me!

Ok, here's the full story.
I applied for a quick job as freelancer. He told me I just had to implement stripe payment gateway. After finishing that he asked to save the user data from payment to the database, too. I added that. All the way he wanted me to work on his ugly project on a rotten server through cpanel. But I refused instead I uploaded a showcase environment on my own server.
After he tested my code and all was working as expected he again tried to make me implement the code right away into his retarded project before payment. When I mentioned that he has to pay me first he started bitching that he won't pay in advance.

At this point I left that fucker. Knowing that my feeling was right and this bitch never had the intention to pay for my work. He just wanted to steel my code.

Fuck you. I hope you get eaten in your bed by very hungry slugs one day. Like this one guy here on devrant.

Yesterday I killed a production server with a handful of sites running on it. 😬

Created an observer for one of my Laravel models. It was generating new translated slugs when another post gets translated by an API. While implementing also an updated method besides the created observation I obviously updated the models slug.
Pretty confident this small update will work I just pushed to production. Tested it live.

BOOM

Hard reset on the server redoing the changes. Searching where I fucked up this time...

Finding me observing the updating while updating the updating of the updating by the updating. 🤦

Team member takes names inputted and coverts them to slugs, works perfectly and functions extremely well.

Adds function to allow slug modifications but doesn't use regex or anything else to verify input is a real slug, application goes down over weekend and know one notices till this morning...

Always verify input both client and server side!!!

At work thres a legacy "common" DLL, which held a helper function that's incharge of creating Slugs, it takes an MD5 of the current time stamp UTC, removing non-URLable chars, and taking the first N chars that remain then

Ngl I was impressed at first at it, but then I thought, its Uniqueness isnt guaranteed

But then again I thought, the uniqueness can be tested via a call given it's indexed anyway in DB so O(1), and if non-unique, just re-call the function. Even in the worst case scenario the hits won't be that many anyway

I didnt change the code, tho at first I was inclined to given my "it isnt proven-unique" stance but am wondering, if this is a good approach
While coolish, it seems wrong in the back of my mind somehow...