Trait ColumnCollectionExt 

pub trait ColumnCollectionExt {
    // Required methods
    fn only(
        &self,
        flag: ColumnFlag,
    ) -> Arc<IndexMap<String, Arc<dyn ColumnLike>>> ;
    fn exclude(
        &self,
        flag: ColumnFlag,
    ) -> Arc<IndexMap<String, Arc<dyn ColumnLike>>> ;
}

Filter a column collection by flag; the filters chain.

let visible_mandatory = table.columns()
    .exclude(ColumnFlag::Hidden)
    .only(ColumnFlag::Mandatory);

Required Methods

fn only(&self, flag: ColumnFlag) -> Arc<IndexMap<String, Arc<dyn ColumnLike>>>

A new collection of only the columns that have flag.

fn exclude( &self, flag: ColumnFlag, ) -> Arc<IndexMap<String, Arc<dyn ColumnLike>>>

A new collection of only the columns that do not have flag.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl ColumnCollectionExt for Arc<IndexMap<String, Arc<dyn ColumnLike>>>

fn only(&self, flag: ColumnFlag) -> Arc<IndexMap<String, Arc<dyn ColumnLike>>>

fn exclude( &self, flag: ColumnFlag, ) -> Arc<IndexMap<String, Arc<dyn ColumnLike>>>

Implementors