Here is what took me an hour to sort with Prisma today.

Deyan Petrov — Sun, 07 Aug 2022 15:41:44 +0000

So today I started learning a bit more about Prisma using MongoDB. But I encountered and issue that seemed mind boggling.

TypeError: Cannot read properties of undefined (reading 'findMany')

TLDR: Restart the server after changing Prisma Schemas.

I was trying to run the following code:

const breakTimeLog = async (req: NextApiRequest, res: NextApiResponse) => {
  const tests = await prisma.breakTimeLog.findMany();
  res.status(200).json(tests);
};

The reason that it was mind boggling is that if I would replace breakTimeLog with user it worked fine. I tried renaming and regenerating the schema as I thought it was a naming issue due to camel case. That was the only thing I could see being different. But no luck ):

Here is the Schema itself

model User {
    id            String         @id @default(auto()) @map("_id") @db.ObjectId
    fname         String
    lname         String
    breakTimeLogs BreakTimeLog[]
}

model BreakTimeLog {
    id            String   @id @default(auto()) @map("_id") @db.ObjectId
    date          DateTime
    timeInSeconds Int
    timeOfBreak   DateTime @default(now())
    user          User     @relation(fields: [userId], references: [id])
    userId        String   @db.ObjectId
}

Every place I looked suggested to generate the schema again or that there is a spelling issue. After an hour on the google rabbit hole I gave up and started hacking at it with random stuff.

Here is the twist I did not restart the server after I created the new model after doing so everything is working fine!

How to check if localStorage item exists

Deyan Petrov — Sun, 07 Aug 2022 13:07:27 +0000

Let's make this short. Since localStorage.getItem("item") returns a null if it is missing, we simply need to check if the return value is not null

if (localStorage.getItem("item") !== null) {
  console.log("Item exists")
  //Do stuff
} else {
  console.log("Item does not exist")
  //Do other stuff
}

DEV Community: Deyan Petrov

Here is what took me an hour to sort with Prisma today.

How to check if localStorage item exists