diff --git a/backend/web/server/plugins/entreprisedufutur/functions.js b/backend/web/server/plugins/entreprisedufutur/functions.js
index fcf848cb4..3ad97c503 100644
--- a/backend/web/server/plugins/entreprisedufutur/functions.js
+++ b/backend/web/server/plugins/entreprisedufutur/functions.js
@@ -425,6 +425,12 @@ declareComputedField({model: 'event', field: 'registered_users_count', getterFn:
 declareComputedField({model: 'event', field: 'available_tickets', getterFn: getReservableTickets})
 declareComputedField({model: 'event', field: 'is_registered', getterFn: getIsRegistered})
 declareComputedField({model: 'event', field: 'waiting_list', getterFn: getStatus('waiting')})
+declareVirtualField({model: 'event', field: 'attachments', multiple: true, instance: 'Array', 
+  caster: {
+    instance: 'ObjectID',
+    options: {ref: 'attachment'}
+  }
+})
 
 // Mission declaration
 declareEnumField({model: 'mission', field: 'estimation_duration_unit', enumValues: ESTIMATED_DURATION_UNITS})
diff --git a/backend/web/server/plugins/entreprisedufutur/schemas/EventSchema.js b/backend/web/server/plugins/entreprisedufutur/schemas/EventSchema.js
index 28a308782..7c7bb137e 100644
--- a/backend/web/server/plugins/entreprisedufutur/schemas/EventSchema.js
+++ b/backend/web/server/plugins/entreprisedufutur/schemas/EventSchema.js
@@ -214,15 +214,6 @@ const EventSchema = new Schema({
     ref: 'eventCategory',
     required: false
   },
-  attachments: {
-    type: [{
-      type: Schema.Types.ObjectId,
-      ref: 'attachment',
-      required: true,
-    }],
-    required: false,
-    default: []
-  },
   partners: {
     type: [{
       type: Schema.Types.ObjectId,
@@ -273,6 +264,12 @@ EventSchema.virtual('status', DUMMY_REF).get(function() {
   return moment().isBefore(this.start_date) ? EVENT_STATUS_FUTUR : EVENT_STATUS_PAST
 })
 
+EventSchema.virtual('attachments', {
+  ref: 'attachment',
+  localField: '_id',
+  foreignField: 'event'
+})
+
 /* eslint-enable prefer-arrow-callback */
 
 module.exports = EventSchema
\ No newline at end of file