Options which configure the behavior of the field
Apply a function to this DataField which propagates through recursively to any contained data schema.
The function to apply
The current value of this field
The results object
Coerce source data to ensure that it conforms to the correct data type for the field. Data coercion operations should be simple and synchronous as these are applied whenever a DataModel is constructed. For one-off cleaning of user-provided input the sanitize method should be used.
The initial value
The cast value
Attempt to retrieve a valid initial value for the DataField.
The source data object for which an initial value is required
A valid initial value
Validate a candidate input for this field, ensuring it meets the field requirements. A validation failure can be provided as a raised Error (with a string message) or by returning false. A validator which returns true denotes that the result is certainly valid and further validations are unnecessary.
The initial value
Returns a ModelValidationError if a validation failure occurred
Apply any cleaning logic specific to this DataField type.
The appropriately coerced value.
The cleaned value.
Special validation rules which supersede regular field validation. This validator screens for certain values which are otherwise incompatible with this field like null or undefined.
The candidate value
A boolean to indicate with certainty whether the value is valid. Otherwise, return void.
The initially provided options which configure the data field
The field name of this DataField instance. This is assigned by SchemaField#initialize.
A reference to the parent schema to which this DataField belongs. This is assigned by SchemaField#initialize.
A dot-separated string representation of the field path within the parent schema.
A subclass of DataField which deals with object-typed data.