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There are two key concepts in Custom Objects:
  • Class represents your schema and contains field names and types.
  • Record represents data you put into your schema.
Class and Record are similar to table and row in relational database. Every class in Custom Object module comes with five mandatory predefined fields: _id, user_id, parent_id, created_at, and updated_at. Allowed data types: Integer (or Array of Integer); String (or Array of String); Float (or Array of Float); Boolean (or Array of Boolean); Location (Array of [<longitude>, <latitude>]); File; Date. For example, you want to store a simple calendar that stores the event title and event date. In this case, you can create a Calendar class with following fields: event_title and event_date. Calendar records will have the following structure:
Field nameType
_id*String
user_id*Integer
parent_id*Integer
event_titleString
event_dateDate
created_at*Integer
updated_at*Integer
Calendar data will look like:
_id*user_id*parent_id*event_titleevent_datecreated_at*updated_at*
5d866b53a28f9a5ad51cb56296753878nullMeet John2019-12-25T14:00:00Z15766297611576629761
5d866b53a28f9a5ad51cb56396753878nullVisit my dentist2019-09-25T15:00:00Z15772824001577282400