diff --git a/examples/getstarted/api/post/models/Post.settings.json b/examples/getstarted/api/post/models/Post.settings.json
index 2a4b9ae818..91e8a2a2f4 100644
--- a/examples/getstarted/api/post/models/Post.settings.json
+++ b/examples/getstarted/api/post/models/Post.settings.json
@@ -20,6 +20,15 @@
       "via": "related",
       "plugin": "upload"
     },
+    "images": {
+      "collection": "file",
+      "via": "related",
+      "plugin": "upload"
+    },
+    "author": {
+      "model": "user",
+      "plugin": "users-permissions"
+    },
     "metas": {
       "type": "component",
       "component": "default.metas",
diff --git a/packages/strapi-connector-bookshelf/lib/mount-models.js b/packages/strapi-connector-bookshelf/lib/mount-models.js
index 4e0135543a..fccb7b93b4 100644
--- a/packages/strapi-connector-bookshelf/lib/mount-models.js
+++ b/packages/strapi-connector-bookshelf/lib/mount-models.js
@@ -547,11 +547,10 @@ module.exports = ({ models, target, plugin = false }, ctx) => {
               : relation;
 
             // Retrieve opposite model.
-            const model = association.plugin
-              ? strapi.plugins[association.plugin].models[
-                  association.collection || association.model
-                ]
-              : strapi.models[association.collection || association.model];
+            const model = strapi.getModel(
+              association.collection || association.model,
+              association.plugin
+            );
 
             // Reformat data by bypassing the many-to-many relationship.
             switch (association.nature) {
@@ -564,15 +563,36 @@ module.exports = ({ models, target, plugin = false }, ctx) => {
                   rel => rel[model.collectionName]
                 );
                 break;
-              case 'oneMorphToOne':
-                attrs[association.alias] =
-                  attrs[association.alias].related || null;
+              case 'oneMorphToOne': {
+                const obj = attrs[association.alias];
+
+                if (obj === undefined || obj === null) {
+                  break;
+                }
+
+                const contentType = strapi.db.getModelByCollectionName(
+                  obj[`${association.alias}_type`]
+                );
+
+                attrs[association.alias] = {
+                  __contentType: contentType ? contentType.globalId : null,
+                  ...obj.related,
+                };
+
                 break;
+              }
               case 'manyMorphToOne':
               case 'manyMorphToMany':
-                attrs[association.alias] = attrs[association.alias].map(
-                  obj => obj.related
-                );
+                attrs[association.alias] = attrs[association.alias].map(obj => {
+                  const contentType = strapi.db.getModelByCollectionName(
+                    obj[`${association.alias}_type`]
+                  );
+
+                  return {
+                    __contentType: contentType ? contentType.globalId : null,
+                    ...obj.related,
+                  };
+                });
                 break;
               default:
             }
diff --git a/packages/strapi-database/lib/database-manager.js b/packages/strapi-database/lib/database-manager.js
index d0555e2151..944dabf661 100644
--- a/packages/strapi-database/lib/database-manager.js
+++ b/packages/strapi-database/lib/database-manager.js
@@ -107,6 +107,12 @@ class DatabaseManager {
       _.get(strapi, ['components', key])
     );
   }
+
+  getModelByCollectionName(collectionName) {
+    return Array.from(this.models.values()).find(model => {
+      return model.collectionName === collectionName;
+    });
+  }
 }
 
 function createDatabaseManager(strapi) {
diff --git a/packages/strapi-plugin-content-manager/services/ContentManager.js b/packages/strapi-plugin-content-manager/services/ContentManager.js
index 3a8e515ccd..2e55f816c5 100644
--- a/packages/strapi-plugin-content-manager/services/ContentManager.js
+++ b/packages/strapi-plugin-content-manager/services/ContentManager.js
@@ -6,8 +6,8 @@ const uploadFiles = require('../utils/upload-files');
  * A set of functions called "actions" for `ContentManager`
  */
 module.exports = {
-  fetch(params) {
-    return strapi.query(params.model).findOne({ id: params.id });
+  fetch(params, populate) {
+    return strapi.query(params.model).findOne({ id: params.id }, populate);
   },
 
   fetchAll(params, query) {
diff --git a/packages/strapi-plugin-graphql/services/Loaders.js b/packages/strapi-plugin-graphql/services/Loaders.js
index 4cf7254fd0..a0325cf45c 100644
--- a/packages/strapi-plugin-graphql/services/Loaders.js
+++ b/packages/strapi-plugin-graphql/services/Loaders.js
@@ -18,14 +18,16 @@ module.exports = {
     // Create loaders for each relational field (exclude core models).
     Object.keys(strapi.models)
       .filter(model => model !== 'core_store')
-      .forEach(model => {
-        this.createLoader(model);
+      .forEach(modelKey => {
+        const model = strapi.models[modelKey];
+        this.createLoader(model.uid);
       });
 
     // Reproduce the same pattern for each plugin.
     Object.keys(strapi.plugins).forEach(plugin => {
-      Object.keys(strapi.plugins[plugin].models).forEach(model => {
-        this.createLoader(model, plugin);
+      Object.keys(strapi.plugins[plugin].models).forEach(modelKey => {
+        const model = strapi.plugins[plugin].models[modelKey];
+        this.createLoader(model.uid);
       });
     });
   },
@@ -34,29 +36,25 @@ module.exports = {
     this.loaders = {};
   },
 
-  createLoader: function(model, plugin) {
-    const name = plugin ? `${plugin}__${model}` : model;
-
-    // Exclude polymorphic from loaders.
-    if (name === undefined) {
-      return;
+  createLoader: function(modelUID) {
+    if (this.loaders[modelUID]) {
+      return this.loaders[modelUID];
     }
 
-    if (this.loaders[name]) {
-      return this.loaders[name];
-    }
-
-    this.loaders[name] = new DataLoader(
+    this.loaders[modelUID] = new DataLoader(
       keys => {
         // Extract queries from keys and merge similar queries.
-        const { queries, map } = this.extractQueries(model, _.cloneDeep(keys));
+        const { queries, map } = this.extractQueries(
+          modelUID,
+          _.cloneDeep(keys)
+        );
 
         // Run queries in parallel.
         return Promise.all(
-          queries.map(query => this.makeQuery(model, query))
+          queries.map(query => this.makeQuery(modelUID, query))
         ).then(results => {
           // Use to match initial queries order.
-          return this.mapData(model, keys, map, results);
+          return this.mapData(modelUID, keys, map, results);
         });
       },
       {
@@ -67,7 +65,7 @@ module.exports = {
     );
   },
 
-  mapData: function(model, originalMap, map, results) {
+  mapData: function(modelUID, originalMap, map, results) {
     // Use map to re-dispatch data correctly based on initial keys.
     return originalMap.map((query, index) => {
       // Find the index of where we should extract the results.
@@ -77,7 +75,7 @@ module.exports = {
       const data = results[indexResults];
 
       // Retrieving referring model.
-      const ref = this.retrieveModel(model, query.options.source);
+      const ref = strapi.getModel(modelUID);
 
       if (query.single) {
         // Return object instead of array for one-to-many relationship.
@@ -98,8 +96,8 @@ module.exports = {
 
       const ast = ref.associations.find(ast => ast.alias === ids.alias);
       const astModel = ast
-        ? this.retrieveModel(ast.model || ast.collection, ast.plugin)
-        : this.retrieveModel(model);
+        ? strapi.getModel(ast.model || ast.collection, ast.plugin)
+        : strapi.getModel(modelUID);
 
       if (!_.isArray(ids)) {
         return data
@@ -144,12 +142,12 @@ module.exports = {
     };
   },
 
-  makeQuery: async function(model, query = {}) {
+  makeQuery: async function(modelUID, query = {}) {
     if (_.isEmpty(query.ids)) {
       return [];
     }
 
-    const ref = this.retrieveModel(model, query.options.source);
+    const ref = strapi.getModel(modelUID);
     const ast = ref.associations.find(ast => ast.alias === query.alias);
 
     const params = {
@@ -169,15 +167,10 @@ module.exports = {
     // Run query and remove duplicated ID.
     return strapi.plugins['content-manager'].services[
       'contentmanager'
-    ].fetchAll({ model }, params);
+    ].fetchAll({ model: modelUID }, params);
   },
 
-  retrieveModel: function(model, source) {
-    // Retrieve refering model.
-    return source ? strapi.plugins[source].models[model] : strapi.models[model];
-  },
-
-  extractQueries: function(model, keys) {
+  extractQueries: function(modelUID, keys) {
     const queries = [];
     const map = [];
 
@@ -188,16 +181,16 @@ module.exports = {
       const { query = {}, ...options } = current.options;
 
       // Retrieving referring model.
-      const ref = this.retrieveModel(model, options.source);
+      const { primaryKey } = strapi.getModel(modelUID);
 
       // Generate array of IDs to fetch.
       const ids = [];
 
       // Only one entry to fetch.
       if (single) {
-        ids.push(params[ref.primaryKey]);
-      } else if (_.isArray(query[ref.primaryKey])) {
-        ids.push(...query[ref.primaryKey]);
+        ids.push(params[primaryKey]);
+      } else if (_.isArray(query[primaryKey])) {
+        ids.push(...query[primaryKey]);
       } else {
         ids.push(query[association.via]);
       }
@@ -205,7 +198,7 @@ module.exports = {
       queries.push({
         ids,
         options,
-        alias: _.first(Object.keys(query)) || ref.primaryKey,
+        alias: _.first(Object.keys(query)) || primaryKey,
       });
 
       map[queries.length - 1 > 0 ? queries.length - 1 : 0] = [];
diff --git a/packages/strapi-plugin-graphql/services/Resolvers.js b/packages/strapi-plugin-graphql/services/Resolvers.js
index ef8104a8bd..90ee9d878e 100644
--- a/packages/strapi-plugin-graphql/services/Resolvers.js
+++ b/packages/strapi-plugin-graphql/services/Resolvers.js
@@ -108,7 +108,7 @@ const mutateAssocAttributes = (associations = [], attributes) => {
     });
 };
 
-const buildAssocResolvers = (model, name, { plugin }) => {
+const buildAssocResolvers = model => {
   const contentManager =
     strapi.plugins['content-manager'].services['contentmanager'];
 
@@ -117,100 +117,44 @@ const buildAssocResolvers = (model, name, { plugin }) => {
   return associations
     .filter(association => model.attributes[association.alias].private !== true)
     .reduce((resolver, association) => {
+      const target = association.model || association.collection;
+      const targetModel = strapi.getModel(target, association.plugin);
+
       switch (association.nature) {
-        case 'oneToManyMorph': {
-          resolver[association.alias] = async obj => {
-            const entry = await contentManager.fetch(
-              {
-                id: obj[primaryKey],
-                model: name,
-              },
-              plugin,
-              [association.alias]
-            );
-
-            // Set the _type only when the value is defined
-            if (entry[association.alias]) {
-              entry[association.alias]._type = _.upperFirst(association.model);
-            }
-
-            return entry[association.alias];
-          };
-          break;
-        }
+        case 'oneToManyMorph':
         case 'manyMorphToOne':
         case 'manyMorphToMany':
         case 'manyToManyMorph': {
           resolver[association.alias] = async obj => {
-            // eslint-disable-line no-unused-vars
-            const [withRelated, withoutRelated] = await Promise.all([
-              contentManager.fetch(
-                {
-                  id: obj[primaryKey],
-                  model: name,
-                },
-                plugin,
-                [association.alias],
-                false
-              ),
-              contentManager.fetch(
-                {
-                  id: obj[primaryKey],
-                  model: name,
-                },
-                plugin,
-                []
-              ),
-            ]);
+            if (obj[association.alias]) {
+              return obj[association.alias];
+            }
 
-            const entry =
-              withRelated && withRelated.toJSON
-                ? withRelated.toJSON()
-                : withRelated;
-
-            entry[association.alias].map((entry, index) => {
-              const type =
-                _.get(withoutRelated, `${association.alias}.${index}.kind`) ||
-                _.upperFirst(
-                  _.camelCase(
-                    _.get(
-                      withoutRelated,
-                      `${association.alias}.${index}.${association.alias}_type`
-                    )
-                  )
-                ) ||
-                _.upperFirst(_.camelCase(association[association.type]));
-
-              entry._type = type;
-
-              return entry;
-            });
+            const entry = await contentManager.fetch(
+              {
+                id: obj[primaryKey],
+                model: model.uid,
+              },
+              [association.alias]
+            );
 
             return entry[association.alias];
           };
           break;
         }
-
         default: {
           resolver[association.alias] = async (obj, options) => {
             // Construct parameters object to retrieve the correct related entries.
             const params = {
-              model: association.model || association.collection,
+              model: targetModel.uid,
             };
 
-            let queryOpts = {
-              source: association.plugin,
-            };
-
-            // Get refering model.
-            const ref = association.plugin
-              ? strapi.plugins[association.plugin].models[params.model]
-              : strapi.models[params.model];
+            let queryOpts = {};
 
             if (association.type === 'model') {
-              params[ref.primaryKey] = _.get(
+              params[targetModel.primaryKey] = _.get(
                 obj,
-                [association.alias, ref.primaryKey],
+                [association.alias, targetModel.primaryKey],
                 obj[association.alias]
               );
             } else {
@@ -229,10 +173,10 @@ const buildAssocResolvers = (model, name, { plugin }) => {
               ) {
                 _.set(
                   queryOpts,
-                  ['query', ref.primaryKey],
+                  ['query', targetModel.primaryKey],
                   obj[association.alias]
                     ? obj[association.alias]
-                        .map(val => val[ref.primaryKey] || val)
+                        .map(val => val[targetModel.primaryKey] || val)
                         .sort()
                     : []
                 );
@@ -240,25 +184,21 @@ const buildAssocResolvers = (model, name, { plugin }) => {
                 _.set(
                   queryOpts,
                   ['query', association.via],
-                  obj[ref.primaryKey]
+                  obj[targetModel.primaryKey]
                 );
               }
             }
 
-            const loaderName = association.plugin
-              ? `${association.plugin}__${params.model}`
-              : params.model;
-
             return association.model
               ? strapi.plugins.graphql.services.loaders.loaders[
-                  loaderName
+                  targetModel.uid
                 ].load({
                   params,
                   options: queryOpts,
                   single: true,
                 })
               : strapi.plugins.graphql.services.loaders.loaders[
-                  loaderName
+                  targetModel.uid
                 ].load({
                   options: queryOpts,
                   association,
@@ -272,16 +212,12 @@ const buildAssocResolvers = (model, name, { plugin }) => {
     }, {});
 };
 
-const buildModel = (
-  model,
-  name,
-  { schema, plugin, isComponent = false } = {}
-) => {
+const buildModel = (model, { schema, isComponent = false } = {}) => {
   const { globalId, primaryKey } = model;
 
   schema.resolvers[globalId] = {
     id: obj => obj[primaryKey],
-    ...buildAssocResolvers(model, name, { plugin }),
+    ...buildAssocResolvers(model),
   };
 
   const initialState = {
@@ -552,7 +488,7 @@ const buildShadowCRUD = (models, plugin) => {
     }
 
     // Build associations queries.
-    acc.resolvers[globalId] = buildAssocResolvers(model, name, { plugin });
+    _.assign(acc.resolvers[globalId], buildAssocResolvers(model));
 
     return acc;
   }, initialState);
diff --git a/packages/strapi-plugin-graphql/services/Schema.js b/packages/strapi-plugin-graphql/services/Schema.js
index 5f42291fe5..aa63281219 100644
--- a/packages/strapi-plugin-graphql/services/Schema.js
+++ b/packages/strapi-plugin-graphql/services/Schema.js
@@ -143,7 +143,7 @@ const schemaBuilder = {
           definition,
           query,
           mutation,
-          resolver,
+          resolvers,
         } = Resolvers.buildShadowCRUD(strapi.plugins[plugin].models, plugin);
 
         // We cannot put this in the merge because it's a string.
@@ -151,7 +151,7 @@ const schemaBuilder = {
 
         return _.merge(acc, {
           query,
-          resolver,
+          resolvers,
           mutation,
         });
       }, modelCruds);
@@ -163,8 +163,7 @@ const schemaBuilder = {
     };
 
     Object.keys(strapi.components).forEach(key =>
-      Resolvers.buildModel(strapi.components[key], key, {
-        plugin: null,
+      Resolvers.buildModel(strapi.components[key], {
         isComponent: true,
         schema: componentsSchema,
       })
diff --git a/packages/strapi-plugin-graphql/services/Types.js b/packages/strapi-plugin-graphql/services/Types.js
index d3da87d831..7b975c949e 100644
--- a/packages/strapi-plugin-graphql/services/Types.js
+++ b/packages/strapi-plugin-graphql/services/Types.js
@@ -222,8 +222,7 @@ module.exports = {
         polymorphicResolver: {
           Morph: {
             __resolveType(obj) {
-              // eslint-disable-line no-unused-vars
-              return obj.kind || obj._type;
+              return obj.kind || obj.__contentType || null;
             },
           },
         },