Archive For The “NoSQL” Category
Here’s a trick I recently picked up when dealing with document databases. Say you need to save objects that have IDs that only differ by case, but you’re using a document DB like Raven where keys are not case sensitive. In Google Books for example, oT7wAAAAIAAJ is an article in Spanish from a Brazilian journal, [...]
Raven DB, like most NoSQL databases designed to be fast and scale out, does not readily support enforcing uniqueness of fields between documents. If two users must not share the same email address or Facebook ID, you cannot simply add a unique constraint for it. However, Raven DB does guarantee uniqueness in one place: each [...]
Say you you have some NUnit/xUnit/Mspec tests that require a live Raven DB instance. Specifically: You do not want your test to be affected by any existing documents, so ideally the Raven DB database would be completely empty. Your test may span multiple document sessions, so doing it all within a single transaction and rolling [...]
Over the past couple of weeks I’ve been playing with Apache CouchDB. If you haven’t seen it yet, you should check it out — it’s a document database that stores data as a flat collection of JSON objects (aka documents) with no schema, no normalization, no indexes, and no JOINs. Communication is via RESTful HTTP [...]
