Add select attribute in blueprints

lib/configuration/hooks/blueprints/actionUtil.js

@@ -21,8 +21,20 @@ module.exports = {
    */
 
   populateEach: function (query, _ctx, model) {
+    const selectedAttributes = _.get(this.parseSelect(_ctx), 'select');
     let shouldPopulate = strapi.config.blueprints.populate;
     let aliasFilter = (_ctx.request.query && _ctx.request.query.populate) || (_ctx.request.body && _ctx.request.body.populate);
+    let associationToPopulate;
+
+    if (!_.isUndefined(selectedAttributes)) {
+      associationToPopulate = _.remove(_.map(model.associations, function (association) {
+        return _.includes(selectedAttributes, association.alias) ? association : undefined;
+      }), function (n) {
+        return !_.isUndefined(n);
+      });
+    } else {
+      associationToPopulate = model.associations;
+    }
 
     // Convert the string representation of the filter list to an array. We
     // need this to provide flexibility in the request param. This way both
@@ -34,7 +46,7 @@ module.exports = {
       aliasFilter = (aliasFilter) ? aliasFilter.split(',') : [];
     }
 
-    return _(model.associations).reduce(function populateEachAssociation(query, association) {
+    return _(associationToPopulate).reduce(function populateEachAssociation(query, association) {
 
       // If an alias filter was provided, override the blueprint config.
       if (aliasFilter) {
@@ -236,5 +248,17 @@ module.exports = {
       skip = +skip;
     }
     return skip;
+  },
+
+  /**
+   * Parse select params.
+   *
+   * @param  {Object} _ctx
+   */
+
+  parseSelect: function (_ctx) {
+    _ctx.options = _ctx.options || {};
+    const select = _ctx.request.query.hasOwnProperty('select') ? _.pick(_ctx.request.query, 'select') : {};
+    return select;
   }
 };

lib/configuration/hooks/blueprints/actions/find.js

@@ -23,7 +23,7 @@ module.exports = function find(_ctx) {
   const Model = actionUtil.parseModel(_ctx);
 
   // Init the query.
-  let query = Model.find()
+  let query = Model.find(actionUtil.parseSelect(_ctx))
     .where(actionUtil.parseCriteria(_ctx))
     .limit(actionUtil.parseLimit(_ctx))
     .skip(actionUtil.parseSkip(_ctx))