The EntityQuery

In this topic we explore Breeze query features and techniques. The following subtopics will be discussed.

  • the role of the EntityManager in querying
  • the resource name: a Rose is not a rose
  • how the client query becomes an URL in OData query syntax
  • getting data from an arbitrary HTTP source
  • queryOptions control how queried entities are found and merged into the cache</li>
  • the query result data package
  • query the local cache with executeQueryLocally
  • combining remote and local query for a refreshed cache perspective on the results
  • hiding async ceremony by pouring results into a data bound, observable array
  • EntityQuery immutability
  • filtering
    • simple conditions
    • compound condition with Predicates
    • conditions on related entities using property paths
    • using withParameters to pass arbitrary parameters to the server
  • using fromEntities to refresh values for or more entities
  • using fromEntityKey to get an entity when you know its key
  • using fromEntityNavigation to load related entities on-demand
  • include related entities in the query result payload with expand
  • paging with skip, take, top, and inlineCount
  • projection queries to select a subset of properties and flatten object graphs
  • orderBy to sort results on the data tier
  • shape the base query on the server with custom query actions
  • Events raised during the query process

Please consult the API documentation for the following related classes:

  • EntityManager
  • FilterQueryOp
  • FetchStrategy
  • MergeStrategy
  • Predicate
  • QueryOptions