问题
I have a model (user) that has an association with another model (phone). This association is many to many. The following call is built in to Sails and allows me to get all the phone records for a particular user:
GET - /user/:userId/phones
I would like to be able to implement pagination on that call but cannot figure out how to get the total number of results. I've tried overwriting the blueprints find.js and/or findOne.js in order to return the count but the call above doesn't seem to run through that logic.
回答1:
Great question. Sails implements many-to-many associations using a "join" model. It doesn't show up in your api/models folder, but you can still query it if you need to. In your case it would be something like:
sails.models['user_phones__phone_users'].count({user_phones: userId}).exec(...)
The exact model name depends on your models and their via keys; simplest way to figure it out is to run sails console and do:
sails.util.keys(sails.models)
to list all the models in the system.
来源：https://stackoverflow.com/questions/29307910/sails-js-get-many-to-many-association-count