Database Connector (Mongo)

Overview

The MongoDB database connector currently does not support ACID transactions. Learn more in this GitHub issue.

A database connector is the bridge between Prisma and the underlying database. The MongoDB connector is used to connect a Prisma server to a MonogDB database.

The core responsibilities of a database connector are:

Translate incoming GraphQL queries into SQL
Send the generated SQL query to the database
Create GraphQL responses based on database result
Perform database migrations (optional)

When configuring your Prisma server with Docker, you need to specify which connector you'd like to use in order to connect to a certain database. You provide this info via the connector property:

PRISMA_CONFIG: |
  managementApiSecret: __YOUR_MANAGEMENT_API_SECRET__
  port: 4466
  databases:
    default:
      connector: mongo
      uri: __YOUR_MONGO_DB_CONNECTION_STRING__
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Managing database connections

The connectionLimit property in PRISMA_CONFIG determines the number of database connections a Prisma service is going to use.

The connectionLimit needs to be set to at least 2. One connection is always reserved for the Management API, all other connections are used for the Prisma service.

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