Major Discussions

Vote on release of Apache CouchDB 1.6.0 rc.5 (will be released as Apache CouchDB 1.6.0 — see thread)

The vote passed.

Limiting view access (see thread)

Use case: sharing docs between users with different roles and according access. Goal is to make sure via adding according CouchDB settings that no user can see who the other users of the doc are.

Answer: Natively, CouchDB doesn’t provide this functionality. Thus, the canonical answer is to use a proxy in front of CouchDB that can limit access to certain URLs, or to deploy a middleware layer written in your favourite language that can broker the access.

CouchDB minimum revs_limit and Compaction (see thread)

Use case: limiting the number of revisions stored for a specific document in a database. Setup: setting the revs_limit to a specific number and then running the compaction. This did not work, the number of revisions could not be limited this way, and the enquirer asked why.

Answer: _revs_limit does not do what one may think it does, – CouchDB is not a revision control system. After completion only the latest revision of each document is preserved. _revs_limit refers only to how many old _rev values are retained. Lowering this value will save some storage but can also make replication less efficient as a failure to find a common ancestor will cause CouchDB to copy the document afresh.

Releases in the CouchDB Universe

• Follow 0.11.2 – can now listen to _db_updates
• docuri 2.1 – rich document IDs for CouchDB, now including custom definitions and polished README
• couch-daemon 1.3.0 – now listens to database updates
• Couchmagick 2.1.2 – now supporting Docuris
• rust-couchdb – a new CouchDB client, now for Rust
• couchdb-worker 3.2.1 – CouchDB worker module that manages state
• express-pouchdb 0.2.0 – express submodule with a CouchDB style REST interface to PouchDB
• lockit-couchdb-adapter 0.4.3 – CouchDB adapter for lockit
• cores 0.8.3 – CouchDB resources with validation

Special topic: Content Management Systems based on CouchDB

• Kleks – a pure CouchDB based CMS written as a CouchApp using Kanso,
  Spine.js, CoffeeScript and Stylus. Supports multi-site setup and
  Markdown authoring
• Couchpress – a super lightweight and modular CMS built on NodeJS, Express and CouchDB
• CMS – a Content Management System written with Ruby on Rails and CouchDB
• Cmtool – a rails 3.2+ CMS as engine for a CouchDB backend
• CCMS – a Backend-free, client-side JavaScript and CouchDB based CMS
• Falkland CMS (Website) – a Curation Management System written in Clojure, ClojureScript and CouchDB

Opinions

• Geocouch on Fedora – a tutorial
• Open Data made simple – CouchDB read only + ElasticSearch river
• PouchDB: CouchDB Within The Browser – an introduction

Use Cases, Questions and Answers

• Stack Overflow: CouchDB View equivalent of SUM & GROUP BY is there any example
• Stack Overflow: Want to make my background image from attachments in CouchDB
• Stack Overflow: How can we run parameterized query in CouchDB
• Stack Overflow: Connecting Couchbase sync adapter to CouchDB server
• Stack Overflow: How do I Return User Specific Data from CouchDB
• Stack Overflow: How to get the field value which contain sub field and value in CouchDB
• Stack Overflow: How can we get the field from a document in CouchDB
• Stack Overflow: Add a field to existing document in CouchDB
• Stack Overflow: implementation of json object and json array in CouchDB using Java
• Stack Overflow: Updating subset of documents in a database – where/when to check and ignore changes?
• Stack Overflow: Retrieve the data from database on the based condition in CouchDB
• Stack Overflow: CouchDB error when typing Couchapp push Errno 111
• Stack Overflow: CouchDB API for php
• Stack Overflow: Getting single property from multiple views in CouchDB using ektorp
• Stack Overflow: How to give subfield to a field of a document in CouchDB using java program?
• Stack Overflow: How to select data from CouchDB on condition based
• Stack Overflow: Get list of all view names in CouchDB
• Stack Overflow: Split values of CouchDB result
• Stack Overflow: CouchDB Futon Web Gui not working properly
• Stack Overflow: How can I filter data during replication and give user only his own documents?
• Stack Overflow: How to retrieve all data from a particular document in CouchDB?

Get involved!

If you want to get into working on CouchDB:

• We have an infinite number of open contributor positions on CouchDB. Submit a pull request and join the project!
• Here’s a list of beginner tickets around our currently ongoing Fauxton-implementation. If you have any questions or need help, don’t hesitate to contact us in the couchdb-dev IRC room (#couchdb-dev) – Garren (garren) and Sue (deathbear) are happy to help.

We’d be happy to have you!

Events

• June 03, New York, USA: High Performance at Scale NoSQL & Big Data Event
• June 03, Oslo, Norway: Erlang in two hours: a hands-on lab
• June 10, Hamburg, Germany: CouchDB Meetup #2
• June 16-17, San Francisco, USA: CloudantCON | tickets (discounted rate)

Job opportunities for people with CouchDB skills

• Speech Scientist – Engineer, Boston, MA, USA
• Sr. Engineer- Search-Recommendations, Boston, MA, USA
• Software Developer/Senior Software Developer Human Genetics Informatics, Cambridge, United Kingdom
• Principal Systems Administrator/Software Developer – Human Genetics Informatics, Cambridge, United Kingdom
• Full Stack Developer, Singapore, Republic of Singapore
• Backend Engineer, San Francisco, CA, USA

… and also in the news

• The Fermi Paradox

Posted on behalf of Lena Reinhard.

Weekly CouchDB meeting – summary

• 1.6.0 release: no new issues were found during voting on CouchDB 1.6.0 rc5
• BigCouch merge: significant progress has been made. Everyone is still encouraged to continue helping with building and testing COUCHDB-1843 branch. Further items for discussions will be sent to the mailing list.
• CouchDB Meetup Hamburg: the CouchDB user group in Hamburg has its own Google Plus Community and will have their next meetup will be on June 10, 2014.

Major Discussions

Running views return nothing with CouchDB 1.5.1 (ongoing discussion; see thread)

Setup: code that creates database, documents and design documents with views and lists. When views are run, nothing is returned under CouchDB 1.5.1. When the same code is run against another CouchDB server (CouchDB 1.5.0), all views return the right responses and results.

Approach: the problem described here could be an error from a library not found while running an external process (CouchJS in this case). It turned out libmozjs.so was either not installed or not in a path searched by the dynamic linker. Once it is added, it should be ensured that CouchJS can be run, afterwards, CouchDB should be able to build the views without restarting CouchDB.

Discussion: Project by-laws (ongoing discussion; see thread)

The discussion about the by-laws is still ongoing, more updates have been made. They can be found here, your feedback is still very welcome.

Release Apache CouchDB 1.6.0 rc5 (see thread)

The testing and voting for all systems is still in progress.

Releases in the CouchDB Universe

• Serve your documents from CouchDB as an OData feed by copying this design doc to your DB
• connect-couchbase – Node.js Session Store for Couchbase backed applications
• changemachine 0.4.11 – handle CouchDB change notifications using neuron
• changemate 0.6.0 – change notification for CouchDB
• attachmate 0.1.7 – CouchDB Attachment Helpers
• docuri 1.1.0 – rich document IDs for CouchDB
• follow 0.11.1 – robust, fault-tolerant CouchDB changes follower
• changes-stream 1.0.5 – simple module that handles getting changes from CouchDB
• couchmagick 2.0.0 – run ImageMagicks `convert` on CouchDB documents
• couch-db 1.1.0 – extendable CouchDB client for Node.js, with convenient APIs

Opinions

• Integrate your Java application with CouchDB (tutorial)
• Get up and running with CouchDb and C# using MyCouch on Windows
• Managing CouchDB with CloverETL
• Who stole my JOINs? – CouchDB doesn’t provide the option of doing joins, however it’s often possible to achieve a similar result using appropriate sorting & ordering within your view, using complex or compound keys and view collation. Here are some explanations and examples to refer to:
  • CouchDB-Guide on Views
  • CouchDB Joins
  • CouchDB views collation docs
  • View collation in CouchDB
  • What’s new in Apache CouchDB 0.11 — Part Two: Views; JOINs Redux, Raw Collation for Speed

Use Cases, Questions and Answers

• Stack Overflow: bad_utf8_character_code Error When Pushing with Erica to CouchDB (no public answer yet)
• Stack Overflow: Difficulty authenticating to CouchDB
• Stack Overflow: CouchDB installed from source binary 1.5.1 doesn’t stop from /etc/init.d/couch stop call
• Stack Overflow: CouchDB authentication fails from ajax call (no public answer yet)
• Stack Overflow: how can we check username exist or not in CouchDB
• Stack Overflow: IrisCouch CouchDB not responding http request on specified port
• Stack Overflow: Pouch DB: database size
• Stack Overflow: CouchDB, how to get document changes only
• Stack Overflow: How To Get Parent Details In CouchDB? (no public answer yet)
• Stack Overflow: CouchDB – _replicator issue when basic auth with url-encoded values (no public answer yet)
• Google Groups: Help: AngularJS delete(id) REST(CouchDB)
• Couchbase: Can CouchDB server replicate with CouchBase Server via Sync Gateway?

Get involved!

If you want to get into working on CouchDB:

• Here’s a list of beginner tickets around our currently ongoing Fauxton-implementation. If you have any questions or need help, don’t hesitate to contact us in the couchdb-dev IRC room (#couchdb-dev) – Garren (garren) and Sue (deathbear) are happy to help.

We’d be happy to have you!

Events

• June 10, Hamburg, Germany: CouchDB Meetup #2
• June 16-17, San Francisco, USA: CloudantCON | tickets (discounted rate)

Job opportunities for people with CouchDB skills

• Bidding platform: building a CouchDB Webservice, no location specified
• Mobile and Web Software Application Developer, Durham, NC, USA

… and also in the news

• Aiming for open source technology that is gorgeous and provides great UX
• The tyranny of structurelessness
• On Decentralisation

Posted on behalf of Lena Reinhard.