Type Structure

Structure - a way to display related objects (references). If the field has a structure specified, then this type of attribute is needed to reduce actions when creating a model, with previously known type classes, whose attributes are used in many other classes.

For the class structure in the main part of the meta class, the value true is set in the "isStruct" field.

In the meta view of creation and change use the type “Group [0]” for the attributes of the “Structure [16]” type. If you do not specify the fields in the group, they are created automatically according to the meta. In list views, there is no need to create columns for structure attributes, the object will not have such a property, but the corresponding attributes of the structure-class will be present. For them, you can add columns.

** NB: ** Objects of the class-structure are not created!

Example

Class-structure:

{
  "isStruct": true,
  "key": [
    "id"
  ],
  "semantic": "",
  "name": "is_struct",
  "version": "",
  "caption": "\"isStruct\" класс-структура",
  "ancestor": null,
  "container": null,
  "creationTracker": "",
  "changeTracker": "",
  "history": 0,
  "journaling": false,
  "compositeIndexes": null,
  "properties": [
    {
      "orderNumber": 10,
      "name": "id",
      "caption": "Идентификатор",
      "type": 12,
      "size": null,
      "decimals": 0,
      "allowedFileTypes": null,
      "maxFileCount": 0,
      "nullable": false,
      "readonly": false,
      "indexed": false,
      "unique": true,
      "autoassigned": true,
      "hint": null,
      "defaultValue": null,
      "refClass": "",
      "itemsClass": "",
      "backRef": "",
      "backColl": "",
      "binding": "",
      "semantic": null,
      "selConditions": [],
      "selSorting": [],
      "selectionProvider": null,
      "indexSearch": false,
      "eagerLoading": false,
      "formula": null
    },
    {
      "orderNumber": 20,
      "name": "last_name",
      "caption": "Фамилия",
      "type": 0,
      "size": null,
      "decimals": 0,
      "allowedFileTypes": null,
      "maxFileCount": 0,
      "nullable": true,
      "readonly": false,
      "indexed": false,
      "unique": false,
      "autoassigned": false,
      "hint": null,
      "defaultValue": null,
      "refClass": "",
      "itemsClass": "",
      "backRef": "",
      "backColl": "",
      "binding": "",
      "semantic": null,
      "selConditions": [],
      "selSorting": [],
      "selectionProvider": null,
      "indexSearch": false,
      "eagerLoading": false,
      "formula": null
    },
    {
      "orderNumber": 30,
      "name": "first_name",
      "caption": "Имя",
      "type": 0,
      "size": null,
      "decimals": 0,
      "allowedFileTypes": null,
      "maxFileCount": 0,
      "nullable": true,
      "readonly": false,
      "indexed": false,
      "unique": false,
      "autoassigned": false,
      "hint": null,
      "defaultValue": null,
      "refClass": "",
      "itemsClass": "",
      "backRef": "",
      "backColl": "",
      "binding": "",
      "semantic": null,
      "selConditions": [],
      "selSorting": [],
      "selectionProvider": null,
      "indexSearch": false,
      "eagerLoading": false,
      "formula": null
    },
    {
      "orderNumber": 40,
      "name": "patronymic",
      "caption": "Отчество",
      "type": 0,
      "size": null,
      "decimals": 0,
      "allowedFileTypes": null,
      "maxFileCount": 0,
      "nullable": true,
      "readonly": false,
      "indexed": false,
      "unique": false,
      "autoassigned": false,
      "hint": null,
      "defaultValue": null,
      "refClass": "",
      "itemsClass": "",
      "backRef": "",
      "backColl": "",
      "binding": "",
      "semantic": null,
      "selConditions": [],
      "selSorting": [],
      "selectionProvider": null,
      "indexSearch": false,
      "eagerLoading": false,
      "formula": null
    },
    {
      "orderNumber": 50,
      "name": "date",
      "caption": "Дата рождения",
      "type": 9,
      "size": null,
      "decimals": 0,
      "allowedFileTypes": null,
      "maxFileCount": 0,
      "nullable": true,
      "readonly": false,
      "indexed": false,
      "unique": false,
      "autoassigned": false,
      "hint": null,
      "defaultValue": null,
      "refClass": "",
      "itemsClass": "",
      "backRef": "",
      "backColl": "",
      "binding": "",
      "semantic": null,
      "selConditions": [],
      "selSorting": [],
      "selectionProvider": null,
      "indexSearch": false,
      "eagerLoading": false,
      "formula": null
    }
  ]
}

Meta class with an attribute of the “Structure [16]” type

{
  "isStruct": false,
  "key": [
    "id"
  ],
  "semantic": "",
  "name": "struct",
  "version": "",
  "caption": "Класс \"Структура [16]\" (класс с типом атрибута 16 - структура)",
  "ancestor": null,
  "container": null,
  "creationTracker": "",
  "changeTracker": "",
  "history": 0,
  "journaling": false,
  "compositeIndexes": null,
  "properties": [
    {
      "orderNumber": 10,
      "name": "id",
      "caption": "Идентификатор",
      "type": 12,
      "size": null,
      "decimals": 0,
      "allowedFileTypes": null,
      "maxFileCount": 0,
      "nullable": false,
      "readonly": false,
      "indexed": false,
      "unique": true,
      "autoassigned": true,
      "hint": null,
      "defaultValue": null,
      "refClass": "",
      "itemsClass": "",
      "backRef": "",
      "backColl": "",
      "binding": "",
      "semantic": null,
      "selConditions": [],
      "selSorting": [],
      "selectionProvider": null,
      "indexSearch": false,
      "eagerLoading": false,
      "formula": null
    },
    {
      "orderNumber": 20,
      "name": "struct",
      "caption": "Класс \"Структура [16]\"",
      "type": 16,
      "size": null,
      "decimals": 0,
      "allowedFileTypes": null,
      "maxFileCount": 0,
      "nullable": true,
      "readonly": false,
      "indexed": false,
      "unique": false,
      "autoassigned": false,
      "hint": null,
      "defaultValue": null,
      "refClass": "is_struct",
      "itemsClass": "",
      "backRef": "",
      "backColl": "",
      "binding": "",
      "semantic": null,
      "selConditions": [],
      "selSorting": [],
      "selectionProvider": null,
      "indexSearch": false,
      "eagerLoading": false,
      "formula": null
    }
  ]
}

Class object with an attribute of structure type in DB:

{
    "_id" : ObjectId("57c3e46fd53ecd50123cc4f5"),
    "struct$id" : "5f421610-6dba-11e6-874f-1b746e204b07",
    "struct$last_name" : "Мирошниченко",
    "struct$first_name" : "Ирина",
    "struct$patronymic" : "Львовна",
    "struct$date" : ISODate("1978-07-13T14:00:00.000Z"),
    "id" : "5f41ef00-6dba-11e6-874f-1b746e204b07",
    "_class" : "struct@develop-and-test",
    "_classVer" : ""
}

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