Hook Field Validators

[robcxyz]

Hook Field Validators

Validate fields with custom logic similar to pydantic's validation

• Proposal Status: implemented

• Issue Number: 241

• Proposal Doc: hook-field-validators.md

Overview

Examples

Simple example where we have an if and return.

H<-:

  foo:

    type: str

    default: bar

    validator:

#      fields:

#        v: Any

#        info: FieldValidationInfo

      fields: ['v', 'info']

      mode:

        enum: ['before', 'after', 'wrap', 'plain']

        default: after  

      body:

        assert->: "{{isinstance(v, 'str')}}"

        return->: v

H<-:

  foo:

    type: str

    default: bar

  validators:

    foo:

      assert->: "{{isinstance(v, 'str')}}"

      return->: v

validator:

  return->: v --if type(v) == 'str' --else raise Wrong type

FieldValidationInfo<-:

  data:

    type: Context

    default->: var public_context

  context:

    type: union[Context]

    default->: var public_context

  Config<-:

    args: ['data', 'context']  

Old

H<-:

  foo:

    type: str

    default: bar

    validators:

      - if: foo is None

        return: ''

      - if: not type(foo, 'str')

        return: ''

      - if: not regex_match(foo, '^[a-zA-Z]')

        return: ''

    validator:

      if: foo is None

      return: ''

H<-:

  type:

    enum:

      - int32

      - int64

    validator:

validator:

  if:

  return:

validator:

  field:

    type: str

    default: v

  info:

    type: FieldValidationInfo

    default: info

  init:

    <-:

      exec:

        var: var var --if var!='item'  

        values: var var --if values!='values'  

  exec: