ANCHORQueries

Racer can fetch or subscribe to queries based on a model value or a database-specific query. When fetching or subscribing to a query, all of the documents associated with that query are also fetched or subscribed.

query = model.query(collectionName, path)

  • collectionName The name of a collection from which to get documents
  • path A model path whose value contains a documentId or an array of documentIds

query = model.query(collectionName, databaseQuery)

  • collectionName The name of a collection from which to get documents
  • databaseQuery A query in the database native format, such as a MonogDB query

The livedb-mongo adapter supports most MongoDB queries that you could pass to the Mongo find() method. See the Mongo DB query documentation and the query selectors reference. Note that projections are not supported; only full documents may be returned. Also, cursor methods are not directly available, so $orderby should be used for sorting, and skips and limits should be specified as $skip and $limit. There is currently no findOne() equivalent—use $limit: 1 instead.

After a query is subscribed or fetched, its results can be returned directly via query.get(). It is also possible to to create a live-updating results set in the model via query.ref().

results = query.get()

  • results Creates and returns an array of each of the document objects matching the query

scoped = query.ref(path)

  • path Local path at which to create an updating refList of the queries results
  • scoped Returns a model scoped to the path at which results are output
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