diff --git a/packages/strapi-generate-api/templates/mongoose/service.template b/packages/strapi-generate-api/templates/mongoose/service.template
index 3219190e32..d76d1ffcae 100755
--- a/packages/strapi-generate-api/templates/mongoose/service.template
+++ b/packages/strapi-generate-api/templates/mongoose/service.template
@@ -18,15 +18,21 @@ module.exports = {
    */
 
   fetchAll: (params) => {
-    const convertedParams = strapi.utils.models.convertParams('<%= globalID.toLowerCase() %>', params);
+    // Convert `params` object to filters compatible with Mongo.
+    const filters = strapi.utils.models.convertParams('<%= globalID.toLowerCase() %>', params);
+    // Select field to populate.
+    const populate = <%= globalID %>.associations
+      .filter(ast => ast.autoPopulate !== false)
+      .map(ast => ast.alias)
+      .join(' ');
 
     return <%= globalID %>
       .find()
-      .where(convertedParams.where)
-      .sort(convertedParams.sort)
-      .skip(convertedParams.start)
-      .limit(convertedParams.limit)
-      .populate(_.keys(_.groupBy(_.reject(strapi.models.<%= id %>.associations, {autoPopulate: false}), 'alias')).join(' '));
+      .where(filters.where)
+      .sort(filters.sort)
+      .skip(filters.start)
+      .limit(filters.limit)
+      .populate(populate);
   },
 
   /**
@@ -36,9 +42,15 @@ module.exports = {
    */
 
   fetch: (params) => {
+    // Select field to populate.
+    const populate = <%= globalID %>.associations
+      .filter(ast => ast.autoPopulate !== false)
+      .map(ast => ast.alias)
+      .join(' ');
+
     return <%= globalID %>
       .findOne(_.pick(params, _.keys(<%= globalID %>.schema.paths)))
-      .populate(_.keys(_.groupBy(_.reject(strapi.models.<%= id %>.associations, {autoPopulate: false}), 'alias')).join(' '));
+      .populate(populate);
   },
 
   /**
@@ -48,12 +60,15 @@ module.exports = {
    */
 
   add: async (values) => {
-    const query = await <%= globalID %>.create(_.omit(values, _.keys(_.groupBy(strapi.models.<%= id %>.associations, 'alias'))));
-    const data = query.toJSON ? query.toJSON() : query;
+    // Extract values related to relational data.
+    const relations = _.pick(values, <%= globalID %>.associations.map(ast => ast.alias));
+    const data = _.omit(values, <%= globalID %>.associations.map(ast => ast.alias));
 
-    await strapi.hook.mongoose.manageRelations('<%= id %>', _.merge(data, { values }));
+    // Create entry with no-relational data.
+    const entry = await <%= globalID %>.create(data);
 
-    return query;
+    // Create relational data and return the entry.
+    return <%= globalID %>.updateRelations({ id: entry.id, values: relations });
   },
 
   /**
@@ -63,11 +78,15 @@ module.exports = {
    */
 
   edit: async (params, values) => {
-    // Note: The current method will return the full response of Mongo.
-    // To get the updated object, you have to execute the `findOne()` method
-    // or use the `findOneOrUpdate()` method with `{ new:true }` option.
-    await strapi.hook.mongoose.manageRelations('<%= id %>', _.merge(_.clone(params), { values }));
-    return <%= globalID %>.update(params, values, { multi: true });
+    // Extract values related to relational data.
+    const relations = _.pick(values, <%= globalID %>.associations.map(a => a.alias));
+    const data = _.omit(values, <%= globalID %>.associations.map(a => a.alias));
+
+    // Update entry with no-relational data.
+    const entry = await <%= globalID %>.update(params, data, { multi: true });
+
+    // Update relational data and return the entry.
+    return <%= globalID %>.updateRelations(Object.assign(params, { values: relations }));
   },
 
   /**
@@ -77,20 +96,31 @@ module.exports = {
    */
 
   remove: async params => {
+    // Select field to populate.
+    const populate = <%= globalID %>.associations
+      .filter(ast => ast.autoPopulate !== false)
+      .map(ast => ast.alias)
+      .join(' ');
+
     // Note: To get the full response of Mongo, use the `remove()` method
     // or add spent the parameter `{ passRawResult: true }` as second argument.
-    const data = await <%= globalID %>.findOneAndRemove(params, {})
-      .populate(_.keys(_.groupBy(_.reject(strapi.models.<%= id %>.associations, {autoPopulate: false}), 'alias')).join(' '));
+    const data = await <%= globalID %>
+      .findOneAndRemove(params, {})
+      .populate(populate);
 
-    _.forEach(<%= globalID %>.associations, async association => {
-      const search = (_.endsWith(association.nature, 'One')) ? { [association.via]: data._id } : { [association.via]: { $in: [data._id] } };
-      const update = (_.endsWith(association.nature, 'One')) ? { [association.via]: null } : { $pull: { [association.via]: data._id } };
+    await Promise.all(
+      <%= globalID %>.associations.map(async association => {
+        const search = _.endsWith(association.nature, 'One') || association.nature === 'oneToMany' ? { [association.via]: data._id } : { [association.via]: { $in: [data._id] } };
+        const update = _.endsWith(association.nature, 'One') || association.nature === 'oneToMany' ? { [association.via]: null } : { $pull: { [association.via]: data._id } };
 
-      await strapi.models[association.model || association.collection].update(
-        search,
-        update,
-        { multi: true });
-    });
+        // Retrieve model.
+        const model = association.plugin ?
+          strapi.plugins[association.plugin].models[association.model || association.collection] :
+          strapi.models[association.model || association.collection];
+
+        return model.update(search, update, { multi: true });
+      })
+    );
 
     return data;
   }
diff --git a/packages/strapi-mongoose/lib/relations.js b/packages/strapi-mongoose/lib/relations.js
index 065ebf8eda..4b07ae1600 100644
--- a/packages/strapi-mongoose/lib/relations.js
+++ b/packages/strapi-mongoose/lib/relations.js
@@ -8,7 +8,7 @@
 const _ = require('lodash');
 
 module.exports = {
-  getModel: async function (model, plugin) {
+  getModel: function (model, plugin) {
     return _.get(strapi.plugins, [plugin, 'models', model]) || get(strapi, ['models', model]) || undefined;
   },
 
@@ -125,6 +125,8 @@ module.exports = {
 
               // Push the work into the flow process.
               toAdd.forEach(value => {
+                value = _.isString(value) ? { [this.primaryKey]: value } : value;
+
                 if (association.nature === 'manyToMany' && !_.isArray(params.values[this.primaryKey] || params[this.primaryKey])) {
                   value[details.via] = (value[details.via] || [])
                     .concat([(params.values[this.primaryKey] || params[this.primaryKey])])
@@ -136,7 +138,7 @@ module.exports = {
                 }
 
                 virtualFields.push(
-                  module.exports.addRelation(model, {
+                  module.exports.addRelation.call(model, {
                     id: value[this.primaryKey] || value.id || value._id,
                     values: _.pick(value, [this.primaryKey, details.via]),
                     foreignKey: current
@@ -145,6 +147,8 @@ module.exports = {
               });
 
               toRemove.forEach(value => {
+                value = _.isString(value) ? { [this.primaryKey]: value } : value;
+
                 if (association.nature === 'manyToMany' && !_.isArray(params.values[this.primaryKey])) {
                   value[details.via] = value[details.via].filter(x => x.toString() !== params.values[this.primaryKey].toString());
                 } else {
@@ -152,7 +156,7 @@ module.exports = {
                 }
 
                 virtualFields.push(
-                  module.export.removeRelation(model, {
+                  module.exports.removeRelation.call(model, {
                     id: value[this.primaryKey] || value.id || value._id,
                     values: _.pick(value, [this.primaryKey, details.via]),
                     foreignKey: current
@@ -213,7 +217,7 @@ module.exports = {
             // Remove relations in the other side.
             toAdd.forEach(id => {
               virtualFields.push(
-                module.exports.addRelationMorph(model, {
+                module.exports.addRelationMorph.call(model, {
                   id,
                   alias: association.via,
                   ref: this.globalId,
@@ -226,7 +230,7 @@ module.exports = {
             // Remove relations in the other side.
             toRemove.forEach(id => {
               virtualFields.push(
-                module.exports.removeRelationMorph(model, {
+                module.exports.removeRelationMorph.call(model, {
                   id,
                   alias: association.via,
                   ref: this.globalId,
@@ -262,7 +266,7 @@ module.exports = {
       .findOne({
         [this.primaryKey]: params[this.primaryKey] || params.id
       })
-      .populate(model.associations.map(x => x.alias).join(' '));
+      .populate(this.associations.map(x => x.alias).join(' '));
   },
 
   addRelation: async function (params) {
diff --git a/packages/strapi-plugin-users-permissions/models/User.settings.json b/packages/strapi-plugin-users-permissions/models/User.settings.json
index 99479b1cba..40d08f202d 100644
--- a/packages/strapi-plugin-users-permissions/models/User.settings.json
+++ b/packages/strapi-plugin-users-permissions/models/User.settings.json
@@ -38,6 +38,10 @@
       "via": "users",
       "plugin": "users-permissions",
       "configurable": false
+    },
+    "article": {
+      "model": "article",
+      "via": "authors"
     }
   }
-}
+}
\ No newline at end of file
diff --git a/packages/strapi/lib/middlewares/boom/index.js b/packages/strapi/lib/middlewares/boom/index.js
index dd023d3fcd..ad2940835a 100644
--- a/packages/strapi/lib/middlewares/boom/index.js
+++ b/packages/strapi/lib/middlewares/boom/index.js
@@ -25,7 +25,7 @@ module.exports = strapi => {
           await next();
         } catch (error) {
           // Log error.
-          strapi.log.error(error);
+          console.error(error);
 
           // Wrap error into a Boom's response.
           ctx.status = error.status || 500;