You run npx prisma migrate deploy in production but get an error saying migrations are missing. What is the likely cause?

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NestJS - Database with Prisma

You run npx prisma migrate deploy in production but get an error saying migrations are missing. What is the likely cause?

AYou forgot to create migration files locally before deploying

BThe database connection string is incorrect

CYou ran migrate dev instead of migrate deploy

DPrisma client was not generated

Step-by-Step Solution

Solution:

Step 1: Understand migrate deploy requirements
migrate deploy applies existing migration files to production; it does not create them.
Step 2: Identify cause of missing migrations error
If migration files were not created locally (e.g., with migrate dev), deploy will fail due to missing files.
Final Answer:
You forgot to create migration files locally before deploying -> Option A
Quick Check:
Deploy needs existing migrations [OK]

Quick Trick: Create migrations locally before deploying to production [OK]

Common Mistakes:

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