Properties

Properties are the typed fields every Object of a Type shares: a Book’s pages, a Project’s status, a Meeting’s date. Because each property has a declared kind, Lar can give it the right editor and you can filter, sort, and query on it, for example type:Book prop.pages:>500.

Property kinds

When you choose Add Property in a Type’s settings, the picker offers:

Kind	Stores
Text	Short or long plain text
Rich text	Formatted text
Number	A number, displayed as a plain number, progress, percent, currency, or cryptocurrency
Checkbox	True or false
Date, Date & time	A day, or a day and time; time and ranges can be optional, required, or disallowed
Label	One or several values from a set of labels with colors; switch between Single and Multiple in its settings
URL	A web address
Color	A color value
JSON	Structured data
Object Select	A relation to other Objects
Blocks	The Type’s rich body

The picker also lists built-in fields you can switch on for a Type: Description, Aliases, Cover Image, Icon, Created at, and Last updated.

Add a property

1. Open Object type settings and select Properties.
2. Choose Add Property and pick a kind.
3. Enter a Name and any kind-specific options, such as the labels for a Label property.
4. Select + Create.
5. To configure more, choose Edit on the property’s row. The settings include its icon, description, format, Visibility, and AI Auto-Fill.

A Type’s full set of properties includes those inherited from its parent and supplied by its Mixins. A new property can’t reuse one of those names; see Mixins.

Control where a property appears

In a property’s Visibility setting, choose:

• Always Show: the row is visible even when empty.
• Hide When Empty: the row appears once it has a value.
• Hidden: the property is left off the Object page but stays stored and queryable.

The Layout, Page layout, and Card view sections of Object type settings control ordering and which properties appear on pages and cards.

Rename, convert, or remove a property

Open Object type settings → Properties and choose Edit on the property.

• Rename: change the Name. The old name is kept as an alias, shown as “aka” under the property, so saved queries and formulas that use it keep working.
• Change the kind: under Change property type, choose a New property type, then Change type. Lar creates a new property, converts each Object’s value where it can, and keeps the original property, marked deprecated, with its values untouched. A message reports how many values were converted and how many were cleared.
• Deprecate: choose Delete on the property’s row and then Deprecate. Existing values are preserved but can no longer be changed, and the property stays in the schema so its meaning isn’t reused.
• Delete permanently: in the property’s settings, choose Delete property and type delete to confirm.

Caution

Delete property removes the property from the Type and clears its value on every Object of that Type and its subtypes, including Objects in Trash. It can’t be undone. Deprecate the property instead if you might need the values.

On the compact (mobile) layout, the Type editor shows Rename, Type, and Deprecate buttons directly on each property row.

Formula and read-only properties

A formula property computes its value from other properties and is read-only on the Object page. Some other properties are read-only because Lar fills them in, such as the file name and size on an uploaded file.

Next: Inheritance.