flexible-fields.js

// In Folder collection
{
  _id: "12345" // This is folderID
}

// In Fields collection
[
  {
    "realEstate": {
        type: Object,
        optional: true,
        folderId: "12345"
     },
     "realEstate.tenant": {
        type:Object,
        optional: true,
        folderId: "12345"
     },
     "realEstate.tenant.basic": {
        type: Object,
        optional: true,
        folderId: "12345"
     },
     "realEstate.tenant.basic.suite": {
        type: Number,
        folderId: "12345",
        value: 5
     },
     "realEstate.tenant.basic.name": {
        type: String,
        folderId: "12345",
        value: "Hung Vo"
     },
     "realEstate.tenant.basic.address": {
        type: String,
        folderId: "12345",
        value: "57 Le Thi Hong Gam, HCMC"
     }
  }
]