How to fix P2000: The provided value for the column is too long for the column's type in Prisma

First, examine the error message to find which column is causing the issue. The error should include the column name in the meta object:

// Error structure
{
  code: "P2000",
  meta: {
    column_name: "description" // or sometimes shows "="
  },
  message: "The provided value for the column is too long..."
}

If the column name is unclear, review your recent write operations and identify which fields might contain long text values.

Modify your Prisma schema to use a database type that supports longer values. For text fields that might exceed 191 characters, use @db.Text or @db.VarChar with a larger limit:

model Post {
  id          String @id @default(cuid())
  title       String @db.VarChar(500)  // For titles up to 500 chars
  description String @db.Text          // For unlimited length text
  content     String @db.Text          // For article body
}

For MySQL/MariaDB, common options are:
- @db.VarChar(n) - Up to n characters
- @db.Text - Up to 65,535 bytes
- @db.MediumText - Up to 16MB
- @db.LongText - Up to 4GB

Generate a new migration to update your database schema:

npx prisma migrate dev --name update_column_types

This will create a migration file and apply it to your database. Review the generated SQL to ensure it's correct:

-- Migration will look similar to:
ALTER TABLE `Post` MODIFY `description` TEXT;
ALTER TABLE `Post` MODIFY `content` TEXT;

For production databases, use:

npx prisma migrate deploy

After updating the schema, regenerate the Prisma Client to ensure TypeScript types are in sync:

npx prisma generate

This updates your type definitions to match the new schema.

Verify the fix by testing with data that previously caused the error:

const testPost = await prisma.post.create({
  data: {
    title: "A".repeat(300), // 300 characters
    description: "B".repeat(1000), // 1000 characters
    content: "C".repeat(10000), // 10,000 characters
  },
});

console.log("Successfully created post with long values");

If this succeeds without the P2000 error, your fix is working.