Derive Macro ModelColumns 

#[derive(ModelColumns)]
{
    // Attributes available to this derive:
    #[columns]
}

Derive a model’s ModelColumns: the table a resource lists it in and the detail page it shows it on, when the resource declares neither.

#[derive(Debug, Clone, toasty::Model, tablo_core::ModelColumns)]
pub struct User {
    #[key]
    #[auto]
    pub id: uuid::Uuid,
    pub name: String,
    pub role: Role,
    pub active: bool,
    #[columns(skip)]
    pub password_hash: String,
    #[default(jiff::Timestamp::now())]
    pub created_at: jiff::Timestamp,
}

// Lists `name`, `role`, `active` and `created_at`, and shows them on the detail page.
let table = <User as tablo_core::ModelColumns>::table();

Each field shows whoever writes it, the person through a form or Toasty through a #[default] or an #[update], in a column its type picks:

• a bool: a sortable BooleanColumn, yes or no;
• a String or Option<String>: a sortable, searchable TextColumn;
• any other FormScalar: a sortable TextColumn, an Options enum by its label;
• an EmbeddedForm value: an EmbeddedColumn, leaf by leaf, on the detail page only;
• a list of FormInput items: a RepeaterColumn, on the detail page only;
• any other type: no column.

No column shows a key Toasty generates, a #[version] field, a relation or its foreign key, which only a declared RelationColumn shows, by the related record’s title, or a TenantId or Option<TenantId> field, which belongs to the resource’s Tenancy. An #[auto] created_at or updated_at shows like any timestamp. A #[version] field is what ModelColumns::version returns, so the edit form refuses a save another save overtook.

Every other field shows, a secret such as a password hash or an API token included, to anyone the policy lets view the list: mark it #[columns(skip)], which leaves it out of the table, its search and export, and the detail page. On a field already left out it is a compile error, as are an unknown key and a generic model.

The derive reads the model, not a form: a file path shows as text and a String an #[form(options = ..)] key labels shows its stored value. Declare a FileColumn or a formatted TextColumn for them.

A resource replaces either default with ResourceDef::table or ResourceDef::detail, and extends one by starting from it: User::table().filters(..), with ModelColumns in scope. Derive a model’s default table and detail page; documented on the tablo-core re-export.