问题
In my previous example I had this query
current_user.friends.events(:event, :rel).where("rel.admin = {admin_p} AND event.detail = {detail_p}").params(admin_p: true, detail_p: true).pluck(:event)
current_user.friends.events brings me up to events to continue my chain, but does this work for if I already have an object that contains an array of events?
In my example, I am trying to use geocoder to pull in proximity.
So I have my user and events which are geocoded.
Geocoder can do something like this
Venue.near([40.71, 100.23], 20) # find all objs within 20 miles
So I can essentially find all the events and store it in an object. Now can I use the neo4j query to filter that object?
e.g.
array_object(:event, :rel).where("rel.admin = {admin_p} AND event.detail = {detail_p}").params(admin_p: true, detail_p: true).pluck(:event)
Even if this works, is there an alternate way to do this?
回答1:
You can't call query proxy methods on an array, so just grab the IDs of those events and filter your match accordingly.
current_user.friends.events(:e).where(neo_id: array_object.map { |e| e.neo_id })
That'll filter the user's friends' events that are in that array. We can use neo_id in where for better performance.
来源：https://stackoverflow.com/questions/27178188/neo4j-gem-querying-from-an-array-object