ReportBuilder.Field

ReportBuilder.Field provides a way to define fields that can be used to generate reports.

Definitions

type Field a

A field describes a column in a report. It has a name, an accessor function and a type.

A field accessor is a function that takes a record and returns a string.

new : String -> FieldAccess a -> Field a

Create a new field with a name and an accessor function.

{ true : String

, false : String

}

-> (a -> Bool)

Define field access for a boolean.

int : (a -> Int) -> FieldAccess a

Define field access for an integer.

string : (a -> String) -> FieldAccess a

Define field access for a string.

optional : ((a -> b) -> FieldAccess a) -> (a -> Maybe b) -> FieldAccess a

Mark a field as optional.

lengthOf : (a -> List b) -> FieldAccess a

Define field access for the length of a list.

encode : a -> Field a -> String

Given a field and a corresponding record, return the value of the field.

Check if a field is numeric.

Mark a field as numeric.