Learning Couchbase

Filtering and transforming data

We have written views in the form of map and reduce functions. A view creates indexes and stores them on disk for all documents with the output of map function, along with reduce function's output. Couchbase provides a filtering mechanism for documents generated by views. We can also perform some transformation on data using; the group level, which is discussed subsequently.

Using keys

We can specify key values to filter documents while querying views, like this:

key="2008"

We can also specify a key explicitly to get only that particular key's details. Here, we will get only the view record that pertains to the 2008 key, as follows:

The following screenshot shows the interface to key in the, key to filter indexes:

Key ...