EntityQuery using jsonResultsAdapter - breeze

Question

I'm trying to use breeze EntityQuery with jsonResultsAdapter to consume a third party API like this (DataService setup omitted):
var jsonResultsAdapter = new breeze.JsonResultsAdapter({
name: "eventAdapter",
extractResults: function (json) {
return json.results;
},
visitNode: function (node, queryContext, nodeContext) {
var entityTypeName = 'Event';
var entityType = entityTypeName && queryContext.entityManager.metadataStore.getEntityType(entityTypeName, true);
var propertyName = nodeContext.propertyName;
var ignore = propertyName && propertyName.substr(0, 1) === "$";
return {
entityType: entityType,
nodeId: node.$id,
nodeRefId: node.$ref,
ignore: ignore
};
}
});
var query = new breeze.EntityQuery("Events")
.using(jsonResultsAdapter);
return this.manager.executeQuery(query);
But it's returning this error: "Cannot read property '$type' of null"
I think that the EntityManager is ignoring the .using(jsonResultAdapter) statement and it's trying to use the default jsonResultsAdapter defined at breeze.js:
ctor.prototype.jsonResultsAdapter = new JsonResultsAdapter({
name: "webApi_default",
visitNode: function (node, queryContext, nodeContext ) {
var entityTypeName = EntityType._getNormalizedTypeName(node.$type);
var entityType = entityTypeName && queryContext.entityManager.metadataStore.getEntityType(entityTypeName, true);
var propertyName = nodeContext.propertyName;
var ignore = propertyName && propertyName.substr(0, 1) === "$";
return {
entityType: entityType,
nodeId: node.$id,
nodeRefId: node.$ref,
ignore: ignore
};
}
Don't know how to tell breeze to use my jsonResultsAdapter instead default one.

Answer 1

As of v 1.2.7, this has been fixed.
----- previous post
Ok, that's a bug. It will be fixed in the next release.
For now, I think you can use the dataService's jsonResultsAdapter instead. i.e. something like this.
var ds = new DataService( { serviceName: yourServiceName, jsonResultsAdapter: yourAdapter });
var em = new EntityManager({ dataService: ds });
var query = new breeze.EntityQuery("Events")
return em.executeQuery(query);