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CouchDB

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1 CouchDB

CouchDB Haskell package is the Haskell interface to the couchDB database software. CouchDB is a document oriented datastorage system (with versions) which is geared towards replication. For more information read Anderson, Lehnardt and Slater's book "CouchDB - The definite guide" ([1]).

Examples how to use the Haskell CouchDB interface are not easy to find on the web. I found only one [2].

I created this wiki page to make available the simple examples I coded to learn to use CouchDB and to report of some of the not-so-obvious traps beginners could fall into.

1.1 Example: Store and retrieve notes

The simple example I selected is the database backend of a "note" application (e.g. Tomboy or any other of the yellow paste-it notes look-alike). The first function is to store a note, as an example on how to store data in couch:

1.1.1 Store note

more text

1.1.2 Retrieve note

Notice that the syntax for retrieval has changed since the example code for "converting from MySQL to CouchDB" was written: no preceeding "/_design/" in the name of the view.


1.2 Coda

I do not guarantee for the correctness of the code (of course). I hope it is useful. I invite others to contribute their examples or more complex codes so we can learn from each other.

I am currently working and interested to hear comments at frank at geoinfo dot tuwien dot ac dot at.