Question 1

How do I use Ragtime with next.jdbc for SQL migrations?

Accepted Answer

Ragtime has built-in support for next.jdbc through its SQL data store implementation. Configure it with your database connection and define migrations as .sql files with up and down statements—the SQL Migrations wiki provides detailed examples and setup instructions.

Question 2

Ragtime vs Migratus: which should I use for my Clojure project?

Accepted Answer

Ragtime excels with its protocol-based design for database independence, ideal if you need flexibility across multiple data stores. Migratus might be better for SQL-only projects with more integrated features like dynamic migrations. Choose based on your need for extensibility versus convenience.

Question 3

Can I use Ragtime with MongoDB or other NoSQL databases?

Accepted Answer

Yes, but it requires custom implementation. You'll need to implement the DataStore and Migration protocols for your specific NoSQL store, as Ragtime only provides out-of-the-box support for SQL via jdbc libraries, which can be time-consuming.

Question 4

What's the best way to handle rollbacks with Ragtime SQL migrations?

Accepted Answer

Define separate up and down SQL statements in your .sql files. Ragtime's Migration protocol includes a run-down! method for rollbacks, and when using SQL migrations, it automatically applies the down statements when rolling back, ensuring reversible changes.

Question 5

How can I integrate Ragtime into a project using tools.deps without Leiningen?

Accepted Answer

Ragtime doesn't have native tools.deps integration, but you can use it programmatically. Write a Clojure script that requires Ragtime, sets up your data store, and calls functions like migrate or rollback—the API docs offer guidance on manual usage for such scenarios.

Question 6

Does Ragtime support conflict strategies for migration errors?

Accepted Answer

Yes, Ragtime allows configurable conflict strategies, such as marking migrations as applied or skipping them. You can define these strategies when setting up migrations to handle cases where migrations might fail or be out of sync.

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