[Solved] You wrote this PrismaService method but get a runtime error: Cannot read property 'user' of undefined. What is the likely cause? async getAllUsers() { return this.prisma.user.findMany(); } Options: | NestJS

NestJS - Database with Prisma

You wrote this PrismaService method but get a runtime error: Cannot read property 'user' of undefined. What is the likely cause?

async getAllUsers() {
  return this.prisma.user.findMany();
}

Options:

AThe Prisma Client instance was not initialized in PrismaService

BThe user model is missing in the Prisma schema

CThe method should be static to access prisma

DfindMany() requires parameters and cannot be empty

Step-by-Step Solution

Solution:

Step 1: Analyze error message
'Cannot read property user of undefined' means this.prisma is undefined in the service.
Step 2: Check PrismaService initialization
Prisma Client must be instantiated and assigned to this.prisma in the constructor; missing this causes the error.
Final Answer:
The Prisma Client instance was not initialized in PrismaService -> Option A
Quick Check:
Uninitialized prisma client = undefined error [OK]

Quick Trick: Initialize prisma client in constructor to avoid undefined errors [OK]

Common Mistakes:

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You wrote this PrismaService method but get a runtime error: Cannot read property 'user' of undefined. What is the likely cause?