Permalink
Switch branches/tags
Find file Copy path
04c0c91 Oct 22, 2017
2 contributors

Users who have contributed to this file

@mikermcneil @sgress454
72 lines (56 sloc) 2.39 KB
/**
* Module dependencies
*/
var actionUtil = require('../actionUtil');
var formatUsageError = require('../formatUsageError');
/**
* Populate (or "expand") an association
*
* http://sailsjs.com/docs/reference/blueprint-api/populate
*
*/
module.exports = function populate(req, res) {
var sails = req._sails;
var parseBlueprintOptions = req.options.parseBlueprintOptions || req._sails.config.blueprints.parseBlueprintOptions;
// Set the blueprint action for parseBlueprintOptions.
req.options.blueprintAction = 'populate';
var queryOptions = parseBlueprintOptions(req);
var Model = req._sails.models[queryOptions.using];
var attrName = queryOptions.alias;
if (!attrName || !Model) { return res.serverError(); }
// The primary key of the parent record
var parentPk = queryOptions.criteria.where[Model.primaryKey];
Model
.findOne(parentPk, queryOptions.populates).meta(queryOptions.meta)
.exec(function found(err, matchingRecord) {
if (err) {
// If this is a usage error coming back from Waterline,
// (e.g. a bad criteria), then respond w/ a 400 status code.
// Otherwise, it's something unexpected, so use 500.
switch (err.name) {
case 'UsageError': return res.badRequest(formatUsageError(err, req));
default: return res.serverError(err);
}
}//-•
if (!matchingRecord) {
sails.log.verbose('In `populate` blueprint action: No parent record found with the specified id (`'+parentPk+'`).');
return res.notFound();
}//-•
if (!matchingRecord[attrName]) {
sails.log.verbose('In `populate` blueprint action: Specified parent record ('+parentPk+') does not have a `'+attrName+'`.');
return res.notFound();
}//-•
// Subcribe to relevant record(s), if appropriate.
if (sails.hooks.pubsub && req.isSocket) {
Model.subscribe(req, matchingRecord);
actionUtil.subscribeDeep(req, matchingRecord);
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
// FUTURE:
// Only subscribe to the associated record(s) without watching the entire
// associated model. (Currently, `.subscribeDeep()` also calls `.watch()`,
// if `autoWatch` is enabled.)
// - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - - -
}
return res.ok(matchingRecord[attrName]);
});
};