Metadata Validator element

The goal of the Validatior element is to ensure that the user provides necessary and properly formatted information needed to successfully complete an operation.

The validator can only be used in combination with other fields:

Available validators:

nameDescription
req

Required value.

alpha

Alphanumeric value.

dec

Decimal value.

num

Numeric value.

email

E-mail value.

url

URL value.

maxlen

Set the maximum length allowed.

minlen

Set the minimum length required.

lt

Less than.

gt

Greater than.

min

Minimum value.

max

Maximum value.

regexp

Regular expression.

plugin

Creates your own form validator.

More information at Creating your own Form Validator plugin.

Parent:

Basic example

  • Value required "req".
  • Value must be decimal "dec".
  • The maximum lenght of the decimal value is 6 digits "maxlen".
<input label="Decimal value" name="okp:consulting.decimal">
    <validator type="dec" />
    <validator type="req" />
    <validator type="maxlen" parameter="6" />
</input>

Regular expression

If you want a validation which is not included in these prefefined, you can use a regular expression. For example, imagine you want to restrict an input to lowecase ASCII values:

<input label="Lowercase value" name="regExp">
    <validator type="regexp" parameter="[a-z]+" />
</input>