The Little Mongo DB Schema Design Book by Christian Kvalheim

Author:Christian Kvalheim [Kvalheim, Christian]
Language: eng
Format: azw3, epub
Published: 2015-10-08T16:00:00+00:00

We want to retrieve the entire subtree of categories for the /electronics category.

Example 2: Fetch subtree of /electronics category 1 var col = db.getSisterDB("catalog").categories; 2 var categories = col.find({parent: /^\/electronics/});

Notice the regular expression /^\/electronics/ that we’re using. This regular expression matches all documents where the field parent starts with /^\/electronics/. The effect is such that the query will return all the categories in the subtree below /electronics.

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