Triggers not working properly with Prisma: [ERROR] `Query '' is required to return data, but found no record(s).`

Bug description

Hello

I’m having trouble when trying to insert a new record to my shipment table, I have a trigger that is in charge of creating a custom unique ID. (you can see the sql script in the How to reproduce section.

NOTE: Whenever I drop the trigger from the table, I can create a record without an error.

Couple of notes

• The trigger works when I use pgAdmin to execute raw sql scripts.
• Whenever I drop the trigger from the table, I can create a record without an error.

This is the error that I get

/Users/gmwill934/Documents/gmwill934/prisma-trigger-error/node_modules/@prisma/client/runtime/index.js:28842
      throw new PrismaClientUnknownRequestError(message, this.client._clientVersion);
            ^
PrismaClientUnknownRequestError: 
Invalid `prisma.shipment.create()` invocation in
/Users/gmwill934/Documents/gmwill934/prisma-trigger-error/prisma.ts:15:34

  12 await prisma.$executeRawUnsafe(setClient("NPS"));
  13 await prisma.$executeRawUnsafe(setWarehouse("01"));
  14 
→ 15 return await prisma.shipment.create(
  Query createOneshipment is required to return data, but found no record(s).
    at RequestHandler.handleRequestError (/Users/gmwill934/Documents/gmwill934/prisma-trigger-error/node_modules/@prisma/client/runtime/index.js:28842:13)
    at RequestHandler.request (/Users/gmwill934/Documents/gmwill934/prisma-trigger-error/node_modules/@prisma/client/runtime/index.js:28820:12)
    at async PrismaClient._request (/Users/gmwill934/Documents/gmwill934/prisma-trigger-error/node_modules/@prisma/client/runtime/index.js:29753:16) {
  clientVersion: '4.2.1'
}

How to reproduce

1. On pgAdmin (postgres), run the following sql script to create the table.

create table shipment (
	client varchar(16) not null default(current_setting('app.client')::varchar(16)),
	warehouse varchar(16) not null default(current_setting('app.warehouse')::varchar(16)),
	id varchar(64) default(''),
	notes text null,
	is_validated boolean not null default(false),
	constraint "PK_Shipment__id" primary key (id)
);

1. Run the following sql script to create the trigger function

create or replace function shipment_custom_id_generator() returns trigger as $$
begin
	new.id = (select
		   		current_setting('app.client') || current_setting('app.warehouse') || 'LPN' || LPAD(cast(count(*) + 1 as varchar(64)),8,'0')::varchar(16)
			from 
				shipment
			where
				client = current_setting('app.client')
				and warehouse = current_setting('app.warehouse')
		   );
	return new;
end
$$ language plpgsql

1. Create the trigger

create trigger shipment_custom_generator_id_trigger
before insert on shipment
for each row
execute procedure shipment_custom_id_generator();

1. Clone the repo https://github.com/gmwill934/prisma-trigger-error
2. Install dependencies
3. Create a .env file with a DATABASE_URL attribute. Make sure it matches your local pg environment. (DATABASE_URL="postgresql://user:password@localhost:port/database-name?schema=schema-name")
4. Run npm run prisma:pull to introspect the database
5. Generate prisma client running npm run prisma:generate
6. Run the app with npm run dev

Expected behavior

Insert a new record on the shipment table without a 500 error code.

Prisma information

This is the my prisma schema

model shipment {
  client       String  @default(dbgenerated("(current_setting('app.client'::text))::character varying(16)")) @db.VarChar(16)
  warehouse    String  @default(dbgenerated("(current_setting('app.warehouse'::text))::character varying(16)")) @db.VarChar(16)
  id           String  @id(map: "PK_Shipment__id") @default("") @db.VarChar(64)
  notes        String?
  is_validated Boolean @default(false)
}

Environment & setup

• OS: Mac OS M1
• Database: Postgres 14
• Node.js version: v16.15.1

Prisma Version

4.2.1

[gmwill934]

Tried workarounds but no luck, data is not unique. Hoping the team could address this at some point.

Thank you very much @janpio

[gmwill934]

For sure @janpio

1. Clone the repo @ https://github.com/gmwill934/prisma-simple and cd to new created folder
2. Install dependencies with npm i
3. Initialize prisma with npx prisma init
4. Change the DATABASE_URL property on your .env file to your environment
5. Copy the following schema on your prisma/schema.prisma file (overwrite it)

Prisma Schema

generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider = "postgresql"
  url      = env("DATABASE_URL")
}

model shipment {
  id   Int     @id
  data String? @db.VarChar(64)
}

1. Execute migrations and generate client npx prisma migrate dev and enter a name for the migration
2. Run SQL script (script.sql) to create simple trigger function and trigger
3. Run app with npm run dev
4. See ERROR

A few notes.

• Error only shows when NO records exist on the table
• Error is shown on the first example that I showed no matter if rows exist (also using interactiveTransactions)

FOR QUICK REFERENCE

Prisma Schema

generator client {
  provider = "prisma-client-js"
}

datasource db {
  provider = "postgresql"
  url      = env("DATABASE_URL")
}

model shipment {
  id   Int     @id
  data String? @db.VarChar(64)
}

SQL Script

create or replace function my_trigger() returns trigger as $$
	begin
		new.id = (select count(*) + 1 from shipment);
		return new;
	end
$$ language plpgsql;

create or replace trigger shipment_my_trigger
before insert on shipment
for each row
execute procedure my_trigger();