diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7ae7d2fb8..642025b76 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,6 +1,8 @@
 # Changelog Fab-manager
 
 - [TODO DEPLOY] `rails db:seed`
+- Fix a bug: unable to filter by multiple user IDs in OpenAPI
+- Tests for OpenAPI user trainings
 
 ## v5.0.8 2021 June 28
 
diff --git a/app/controllers/open_api/v1/invoices_controller.rb b/app/controllers/open_api/v1/invoices_controller.rb
index f7254863d..ec3f4176b 100644
--- a/app/controllers/open_api/v1/invoices_controller.rb
+++ b/app/controllers/open_api/v1/invoices_controller.rb
@@ -11,7 +11,7 @@ class OpenAPI::V1::InvoicesController < OpenAPI::V1::BaseController
                        .includes(invoicing_profile: :user)
                        .references(:invoicing_profiles)
 
-    @invoices = @invoices.where('invoicing_profiles.user_id = ?', params[:user_id]) if params[:user_id].present?
+    @invoices = @invoices.where(invoicing_profiles: { user_id: params[:user_id] }) if params[:user_id].present?
 
     return unless params[:page].present?
 
diff --git a/app/controllers/open_api/v1/reservations_controller.rb b/app/controllers/open_api/v1/reservations_controller.rb
index 807716793..a721b8b29 100644
--- a/app/controllers/open_api/v1/reservations_controller.rb
+++ b/app/controllers/open_api/v1/reservations_controller.rb
@@ -11,7 +11,7 @@ class OpenAPI::V1::ReservationsController < OpenAPI::V1::BaseController
                                .includes(statistic_profile: :user)
                                .references(:statistic_profiles)
 
-    @reservations = @reservations.where('statistic_profiles.user_id = ?', params[:user_id]) if params[:user_id].present?
+    @reservations = @reservations.where(statistic_profiles: { user_id: params[:user_id] }) if params[:user_id].present?
     @reservations = @reservations.where(reservable_type: format_type(params[:reservable_type])) if params[:reservable_type].present?
     @reservations = @reservations.where(reservable_id: params[:reservable_id]) if params[:reservable_id].present?
 
diff --git a/app/controllers/open_api/v1/user_trainings_controller.rb b/app/controllers/open_api/v1/user_trainings_controller.rb
index 38f0eab18..f367c1d6d 100644
--- a/app/controllers/open_api/v1/user_trainings_controller.rb
+++ b/app/controllers/open_api/v1/user_trainings_controller.rb
@@ -13,7 +13,7 @@ class OpenAPI::V1::UserTrainingsController < OpenAPI::V1::BaseController
                                               .order(created_at: :desc)
 
 
-    @user_trainings = @user_trainings.where('statistic_profiles.user_id = ?', params[:user_id]) if params[:user_id].present?
+    @user_trainings = @user_trainings.where(statistic_profiles: { user_id: params[:user_id] }) if params[:user_id].present?
     @user_trainings = @user_trainings.where(training_id: params[:training_id]) if params[:training_id].present?
 
     return unless params[:page].present?
diff --git a/db/structure.sql b/db/structure.sql
index 7427b5394..d20d18686 100644
--- a/db/structure.sql
+++ b/db/structure.sql
@@ -108,8 +108,8 @@ SET default_tablespace = '';
 
 CREATE TABLE public.abuses (
     id integer NOT NULL,
-    signaled_id integer,
     signaled_type character varying,
+    signaled_id integer,
     first_name character varying,
     last_name character varying,
     email character varying,
@@ -187,8 +187,8 @@ CREATE TABLE public.addresses (
     locality character varying,
     country character varying,
     postal_code character varying,
-    placeable_id integer,
     placeable_type character varying,
+    placeable_id integer,
     created_at timestamp without time zone,
     updated_at timestamp without time zone
 );
@@ -263,8 +263,8 @@ CREATE TABLE public.ar_internal_metadata (
 
 CREATE TABLE public.assets (
     id integer NOT NULL,
-    viewable_id integer,
     viewable_type character varying,
+    viewable_id integer,
     attachment character varying,
     type character varying,
     created_at timestamp without time zone,
@@ -504,8 +504,8 @@ ALTER SEQUENCE public.coupons_id_seq OWNED BY public.coupons.id;
 
 CREATE TABLE public.credits (
     id integer NOT NULL,
-    creditable_id integer,
     creditable_type character varying,
+    creditable_id integer,
     plan_id integer,
     hours integer,
     created_at timestamp without time zone,
@@ -1223,15 +1223,15 @@ ALTER SEQUENCE public.machines_id_seq OWNED BY public.machines.id;
 CREATE TABLE public.notifications (
     id integer NOT NULL,
     receiver_id integer,
-    attached_object_id integer,
     attached_object_type character varying,
+    attached_object_id integer,
     notification_type_id integer,
     is_read boolean DEFAULT false,
     created_at timestamp without time zone,
     updated_at timestamp without time zone,
     receiver_type character varying,
     is_send boolean DEFAULT false,
-    meta_data jsonb DEFAULT '{}'::jsonb
+    meta_data jsonb DEFAULT '"{}"'::jsonb
 );
 
 
@@ -1792,8 +1792,8 @@ CREATE TABLE public.prices (
     id integer NOT NULL,
     group_id integer,
     plan_id integer,
-    priceable_id integer,
     priceable_type character varying,
+    priceable_id integer,
     amount integer,
     created_at timestamp without time zone NOT NULL,
     updated_at timestamp without time zone NOT NULL
@@ -2108,8 +2108,8 @@ CREATE TABLE public.reservations (
     message text,
     created_at timestamp without time zone,
     updated_at timestamp without time zone,
-    reservable_id integer,
     reservable_type character varying,
+    reservable_id integer,
     nb_reserve_places integer,
     statistic_profile_id integer
 );
@@ -2141,8 +2141,8 @@ ALTER SEQUENCE public.reservations_id_seq OWNED BY public.reservations.id;
 CREATE TABLE public.roles (
     id integer NOT NULL,
     name character varying,
-    resource_id integer,
     resource_type character varying,
+    resource_id integer,
     created_at timestamp without time zone,
     updated_at timestamp without time zone
 );
@@ -4263,6 +4263,14 @@ ALTER TABLE ONLY public.roles
     ADD CONSTRAINT roles_pkey PRIMARY KEY (id);
 
 
+--
+-- Name: schema_migrations schema_migrations_pkey; Type: CONSTRAINT; Schema: public; Owner: -
+--
+
+ALTER TABLE ONLY public.schema_migrations
+    ADD CONSTRAINT schema_migrations_pkey PRIMARY KEY (version);
+
+
 --
 -- Name: settings settings_pkey; Type: CONSTRAINT; Schema: public; Owner: -
 --
@@ -5398,29 +5406,6 @@ CREATE INDEX profiles_lower_unaccent_last_name_trgm_idx ON public.profiles USING
 CREATE INDEX projects_search_vector_idx ON public.projects USING gin (search_vector);
 
 
---
--- Name: unique_schema_migrations; Type: INDEX; Schema: public; Owner: -
---
-
-CREATE UNIQUE INDEX unique_schema_migrations ON public.schema_migrations USING btree (version);
-
-
---
--- Name: accounting_periods accounting_periods_del_protect; Type: RULE; Schema: public; Owner: -
---
-
-CREATE RULE accounting_periods_del_protect AS
-    ON DELETE TO public.accounting_periods DO INSTEAD NOTHING;
-
-
---
--- Name: accounting_periods accounting_periods_upd_protect; Type: RULE; Schema: public; Owner: -
---
-
-CREATE RULE accounting_periods_upd_protect AS
-    ON UPDATE TO public.accounting_periods DO INSTEAD NOTHING;
-
-
 --
 -- Name: projects projects_search_content_trigger; Type: TRIGGER; Schema: public; Owner: -
 --
@@ -6011,7 +5996,6 @@ INSERT INTO "schema_migrations" (version) VALUES
 ('20140605125131'),
 ('20140605142133'),
 ('20140605151442'),
-('20140606133116'),
 ('20140609092700'),
 ('20140609092827'),
 ('20140610153123'),
@@ -6080,14 +6064,12 @@ INSERT INTO "schema_migrations" (version) VALUES
 ('20150507075620'),
 ('20150512123546'),
 ('20150520132030'),
-('20150520133409'),
 ('20150526130729'),
 ('20150527153312'),
 ('20150529113555'),
 ('20150601125944'),
 ('20150603104502'),
 ('20150603104658'),
-('20150603133050'),
 ('20150604081757'),
 ('20150604131525'),
 ('20150608142234'),
@@ -6169,7 +6151,6 @@ INSERT INTO "schema_migrations" (version) VALUES
 ('20160905142700'),
 ('20160906094739'),
 ('20160906094847'),
-('20160906145713'),
 ('20160915105234'),
 ('20161123104604'),
 ('20170109085345'),
diff --git a/test/integration/open_api/user_trainings_test.rb b/test/integration/open_api/user_trainings_test.rb
new file mode 100644
index 000000000..5d6ca96d6
--- /dev/null
+++ b/test/integration/open_api/user_trainings_test.rb
@@ -0,0 +1,31 @@
+# frozen_string_literal: true
+
+require 'test_helper'
+
+module OpenApi; end
+
+class OpenApi::UsersTest < ActionDispatch::IntegrationTest
+  def setup
+    @token = OpenAPI::Client.find_by(name: 'minitest').token
+  end
+
+  test 'list all user trainings' do
+    get '/open_api/v1/user_trainings', headers: open_api_headers(@token)
+    assert_response :success
+  end
+
+  test 'list all user trainings with pagination' do
+    get '/open_api/v1/user_trainings?page=1&per_page=5', headers: open_api_headers(@token)
+    assert_response :success
+  end
+
+  test 'list all user trainings filtering by training' do
+    get '/open_api/v1/user_trainings?training_id=[2,3,4]', headers: open_api_headers(@token)
+    assert_response :success
+  end
+
+  test 'list all user trainings filtering by user' do
+    get '/open_api/v1/user_trainings?user_id=[4,5]', headers: open_api_headers(@token)
+    assert_response :success
+  end
+end