UBERF-7428: Fix memory issues (#5940)

Signed-off-by: Andrey Sobolev <haiodo@gmail.com>

server/middleware/src/spacePermissions.ts

@@ -109,7 +109,17 @@ export class SpacePermissionsMiddleware extends BaseMiddleware implements Middle
       space,
       spaceType.targetClass
     ) as unknown as RolesAssignment
-    this.assignmentBySpace[space._id] = asMixin
+
+    const allPossibleRoles = this.storage.modelDb.findAllSync(core.class.Role, {})
+    const requiredValues: Record<string, any> = {}
+    for (const role of allPossibleRoles) {
+      const v = asMixin[role._id]
+      if (v !== undefined) {
+        requiredValues[role._id] = asMixin[role._id]
+      }
+    }
+
+    this.assignmentBySpace[space._id] = requiredValues
 
     await this.setPermissions(space._id, await this.getRoles(spaceType._id), asMixin)
   }
@@ -193,7 +203,17 @@ export class SpacePermissionsMiddleware extends BaseMiddleware implements Middle
     // Note: currently the whole assignment is always included into the mixin update
     // so we can just rebuild the permissions
     const assignment: RolesAssignment = mixinDoc.attributes as RolesAssignment
-    this.assignmentBySpace[spaceId] = assignment
+
+    const allPossibleRoles = this.storage.modelDb.findAllSync(core.class.Role, {})
+    const requiredValues: Record<string, any> = {}
+    for (const role of allPossibleRoles) {
+      const v = assignment[role._id]
+      if (v !== undefined) {
+        requiredValues[role._id] = assignment[role._id]
+      }
+    }
+
+    this.assignmentBySpace[spaceId] = requiredValues
 
     this.permissionsBySpace[tx.objectId] = {}
     await this.setPermissions(spaceId, await this.getRoles(spaceType._id), assignment)