module Athena::Validator::ExecutionContextInterface

Overview

Stores contextual data related to the current validation run.

This includes the violations generated so far, the current constraint, value being validated, etc.

Adding Violations

As mentioned in the AVD::ConstraintValidatorInterface documentation, violations are not returned from the AVD::ConstraintValidatorInterface#validate method. Instead they are added to the AVD::ConstraintValidatorInterface#context instance.

The simplest way to do so is via the #add_violation method, which accepts the violation message, and any parameters that should be used to render the message. Additional overloads exist to make adding a value with a specific message, and code, or message, code, and {{ value }} placeholder value easier.

Building violations

In some cases you may wish to add additional data to the AVD::Violation::ConstraintViolationInterface before adding it to self. To do this, you can also use the #build_violation method, which returns an AVD::Violation::ConstraintViolationBuilderInterface that can be used to construct a violation, with an easier API.

Direct including types

Defined in:

execution_context_interface.cr

Instance Method Summary

Instance Method Detail

abstract def add_violation(message : String, code : String, value : _) : Nil #

Adds a violation with the provided message, and code, value parameter.

The provided value is added to the violations' parameters as "{{ value }}".


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abstract def add_violation(message : String, parameters : Hash(String, String) = {} of String => String) : Nil #

Adds a violation with the provided message, and optionally parameters based on the node currently being validated.


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abstract def add_violation(message : String, code : String) : Nil #

Adds a violation with the provided message and code


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abstract def build_violation(message : String, code : String, value : _) : AVD::Violation::ConstraintViolationBuilderInterface #

Returns an AVD::Violation::ConstraintViolationBuilderInterface with the provided message, and code, and value.

The provided value is added to the violations' parameters as "{{ value }}".


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abstract def build_violation(message : String, parameters : Hash(String, String) = {} of String => String) : AVD::Violation::ConstraintViolationBuilderInterface #

Returns an AVD::Violation::ConstraintViolationBuilderInterface with the provided message.

Can be used to add additional information to the AVD::Violation::ConstraintViolationInterface being adding it to self.


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abstract def build_violation(message : String, code : String) : AVD::Violation::ConstraintViolationBuilderInterface #

Returns an AVD::Violation::ConstraintViolationBuilderInterface with the provided message, and code.


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abstract def class_name #

Returns the class that is currently being validated.


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abstract def constraint : AVD::Constraint? #

Returns the AVD::Constraint that is currently being validated, if any.


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abstract def group : String? #

Returns the group that is currently being validated, if any.


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abstract def metadata : AVD::Metadata::MetadataInterface? #

Returns an AVD::Metadata::MetadataInterface object for the value currently being validated.

This would be an AVD::Metadata::PropertyMetadataInterface if the current value is an object, an AVD::Metadata::GenericMetadata if the current value is a plain value, and an AVD::Metadata::ClassMetadata if the current value value is an entire class.


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abstract def object #

Returns the object that is currently being validated.


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abstract def property_name : String? #

Returns the property name of the node currently being validated.


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abstract def property_path : String #

Returns the path to the property that is currently being validated.

For example, given a Person object that has an Address property; the property path would be empty initially. When the address property is being validated the property_path would be address. When the street property of the related Address object is being validated the property_path would be address.street.

This also works for collections of objects. If the Person object had multiple addresses, the property path when validating the first street of the first address would be addresses[0].street.


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abstract def root #

Returns the object initially passed to AVD::Validator::ValidatorInterface#validate.


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abstract def validator : AVD::Validator::ValidatorInterface #

Returns a reference to an AVD::Validator::ValidatorInterface that can be used to validate additional constraints as part of another constraint.


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abstract def value #

Returns the value that is currently being validated.


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Returns the AVD::Violation::ConstraintViolationInterface instances generated by the validator thus far.


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