{
  "_group": "system_collections",
  "_name": "activity",
  "_version": "202507",
  "singular": "activity",
  "plural": "activities",
  "idPrefix": "act",
  "system": true,
  "indexSpecs": [{
    "name": "name_1",
    "keys": { "name": 1 },
    "unique": true
  }],
  "schema": {
    "type": "object",
    "properties": {
      "_id": {
        "bsonType": "string"
      },
      "person": {
        "bsonType": "string"
      },
      "name": {
        "bsonType": "string"
      },
      "createdAt": {
        "bsonType": "date"
      },
      "updatedAt": {
        "bsonType": "date"
      },
      "archivedAt": {
        "bsonType": "date"
      }
    }
  },
  "views": {
    "activityExpanded": {
      "viewOn": "activity",
      "pipeline": [{
        "$lookup": {
          "from": "person",
          "localField": "person",
          "foreignField": "_id",
          "as": "refPerson"
        }
      }, {
        "$unwind": "$refPerson"
      }, {
        "$set": { "person": "$refPerson" }
      }, {
        "$unset": "refPerson"
      }]
    }
  }
}