update mysql adapter to include connection string parameter

[newclarityex]

Summary by CodeRabbit

Release Notes

• Documentation
  • Added alternative usage example for MySQL database adapter configuration, demonstrating how to instantiate the adapter with a connection string and environment variables.

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[coderabbitai]

Walkthrough

Documentation content updated to include an alternative usage example demonstrating how to instantiate the PrismaMariaDb adapter using a connection string, environment variable retrieval, and integration with PrismaClient.

Changes

Cohort / File(s)	Summary
Documentation example addition content/200-orm/050-overview/500-databases/400-mysql.mdx	Added alternative usage example showing PrismaMariaDb adapter instantiation with connection string, environment variable handling, and PrismaClient wiring

Estimated code review effort

🎯 2 (Simple) | ⏱️ ~10 minutes

Pre-merge checks

✅ Passed checks (3 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding a connection string parameter example to the MySQL/MariaDB adapter documentation.
Docstring Coverage	✅ Passed	No functions found in the changed files to evaluate docstring coverage. Skipping docstring coverage check.

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[coderabbitai]

Actionable comments posted: 2

🤖 Fix all issues with AI Agents

In @content/200-orm/050-overview/500-databases/400-mysql.mdx:
- Line 80: The code wraps process.env.DATABASE_URL in a template literal which
turns undefined into the string "undefined" and causes confusing parsing errors;
replace the template usage by reading the env var directly (const
connectionString = process.env.DATABASE_URL) and add an explicit check that
throws or logs a clear error if connectionString is missing (e.g., if
(!connectionString) throw new Error("DATABASE_URL environment variable not
set")) so failures report the missing env var rather than a malformed
"undefined" connection string.
- Line 82: The code calls new PrismaMariaDb(connectionString) but PrismaMariaDb
expects an options/config object (e.g., host, port, user, password, database,
connectionLimit) rather than a plain connection string; replace the
connectionString argument with an object literal containing those properties
when instantiating PrismaMariaDb (reference: PrismaMariaDb constructor).

📜 Review details

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📥 Commits

Reviewing files that changed from the base of the PR and between 0d85850 and d93cbfa.

📒 Files selected for processing (1)

• content/200-orm/050-overview/500-databases/400-mysql.mdx

[aidankmcalister]

👋 Hi @newclarityex! Thanks for your contribution to the Prisma docs.

We wanted to let you know that we've recently updated our documentation structure and guidelines. Your PR may need to be updated to align with these changes.

Action needed:

• Please review the latest changes on the main branch
• Update your PR accordingly
• Check our updated Contributing Guide for current conventions and guidelines