Struct CountColumn 

pub struct CountColumn<M> { /* private fields */ }

A column counting the records of a Deferred has_many field that a source S shows, which declares the field’s include so every page that renders it loads the records.

use tablo_core::{CountColumn, relation};

CountColumn::of::<CommentResource>(relation!(Post.comments));

The header and the column’s name are the field’s name, capitalized, until label replaces both.

The count is how many of the loaded records S shows the user, which RelationColumn decides the same way: a page loads every related record of every row it counts. unscoped counts every record the include loads.

Implementations

impl<M> CountColumn<M>

where M: Model + Send + Sync + 'static,

pub fn of<S>(relation: RelationLens<M, Deferred<Vec<S::Model>>>) -> Self

where S: OptionSource,

Declare a column counting the records relation loads that S shows.

pub fn unscoped<T>(relation: RelationLens<M, Deferred<Vec<T>>>) -> Self

where T: Model + 'static,

Declare a column counting every record relation loads, under no resource’s query or policy: for a related model no resource administers. A count shows no field of the records.

impl<M> CountColumn<M>

pub fn label(self, label: impl Into<Text>) -> Self

Replace the label the field’s name gives it, and name the column after the label, as a ComputedColumn is: two columns over one relation need two labels.

pub fn width(self, width: ColumnWidth) -> Self

Declare this column’s width.

pub fn toggleable(self) -> Self

Let each reader hide this column from their list; it starts shown.

pub fn hidden_by_default(self) -> Self

Let each reader show this column in their list; it starts hidden.

Trait Implementations

impl<M> Clone for CountColumn<M>

fn clone(&self) -> Self

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<M> Column<M> for CountColumn<M>

where M: Model + Send + Sync + 'static,

fn name(&self) -> &str

The column’s identifier, distinct within its table.

fn label(&self) -> Text

The header text.

fn text(&self, cx: &Cx, row: &M) -> String

The row’s value as plain text.

fn column_width(&self) -> ColumnWidth

The width the column claims.

fn toggle(&self) -> ColumnToggle

Whether each reader may hide or show the column in their list, and how it starts. A detail page shows every column.

fn includes(&self) -> Includes<M>

The relations text, cell and entry read.

fn reads(&self) -> Option<Reads<M>>

The fields of the row text, cell, entry, search_expr and order_by read, or None when the column does not say.

fn cell<'a>(&self, cx: &'a Cx, row: &M) -> BoxView<'a>

The row’s table cell.

fn entry<'a>(&self, cx: &'a Cx, row: &M) -> BoxView<'a>

The record’s entry on a detail page: the label over the cell.

fn alignment(&self) -> Alignment

Where the header and the cells align their content.

fn is_searchable(&self) -> bool

Whether the column joins the table’s search.

fn search_expr(&self, _term: &str) -> Option<Expr<bool>>

The predicate a search for term adds.

fn is_sortable(&self) -> bool

Whether the header links to a sort on this column.

fn order_by(&self, _descending: bool) -> Option<OrderByExpr>

The ordering a sort on this column applies.

impl<M> Debug for CountColumn<M>

fn fmt(&self, __f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<M> IntoColumns<M> for CountColumn<M>

where Self: Column<M> + 'static,

impl<M> IntoDetail<M> for CountColumn<M>

where Self: Column<M> + 'static,

fn into_detail(self) -> Detail<M>