Constraints: Constraints class

In tableschema.r: Table Schema 'Frictionless Data'

Constraints class

Description

R6 class with constraints.

The constraints property on Table Schema Fields can be used by consumers to list constraints for validating field values. For example, validating the data in a Tabular Data Resource against its Table Schema; or as a means to validate data being collected or updated via a data entry interface.

All constraints MUST be tested against the logical representation of data, and the physical representation of constraint values MAY be primitive types as possible in JSON, or represented as strings that are castable with the type and format rules of the field.

Format

R6Class object.

Value

Object of R6Class .

Fields

constraints

see Section See Also

See Also

Constraints specifications, constraints.checkEnum, constraints.checkMaximum, constraints.checkMaxLength, constraints.checkMinimum, constraints.checkMinLength, constraints.checkPattern, constraints.checkRequired, constraints.checkUnique

tableschema.r documentation built on Sept. 30, 2022, 1:06 a.m.