(Quick Reference)

field

Purpose

Specifies an input field where the user can enter data. An implicit "id" attribute is given the same value as the name unless you explicitly specify one.

Examples

<g:field type="number" name="isbn" min="5" max="10" required="" value="${bookInstance?.isbn}"/>

<g:field type="password" name="password" value="${userInstance?.password}"/>

<g:field type="url" name="url" value="${productInstance?.url}"/>

Description

Attributes

  • name (required) - The name of the field

  • type (required) - Specifies the type of element to display (button, checkbox, color, date, datetime, datetime-local, email, file, hidden, image, month, number, password, radio, range, reset, search, submit, tel, text, time, url, week)

  • accept (optional) - Specifies the types of files that the server accepts (only for type="file")

  • alt (optional) - Specifies an alternate text for images (only for type="image")

  • autocomplete (optional) - Specifies whether the field should have autocomplete enabled

  • autofocus (optional) - Specifies that the field should automatically get focus when the page loads

  • checked (optional) - Specifies that the field should be pre-selected when the page loads (for type="checkbox" or type="radio")

  • disabled (optional) - Specifies that the field element should be disabled

  • height (optional) - Specifies the height of the field (only for type="image")

  • list (optional) - Refers to a <datalist> element that contains pre-defined options for the field

  • max (optional) - Specifies the maximum value for the field

  • maxlength (optional) - Specifies the maximum number of characters allowed in the field

  • min (optional) - Specifies a minimum value for the field

  • multiple (optional) - Specifies that a user can enter more than one value in the field

  • pattern (optional) - Specifies a regular expression that the field’s value is checked against

  • placeholder (optional) - Specifies a short hint that describes the expected value for the field

  • readonly (optional) - Specifies that the field is read-only

  • required (optional) - Specifies that the field must be filled out before submitting the form

  • size (optional) - Specifies the width, in characters, of the field

  • src (optional) - Specifies the URL of the image to use as a submit button (only for type="image")

  • step (optional) - Specifies the legal number intervals for the field

  • value (optional) - Specifies the value of the field

  • width (optional) - Specifies the width of the field (only for type="image")

Configuration

Some attributes can be defined as Boolean values, but the html specification mandates the attribute must have the same value as its name. For example, disabled, readonly and checked. It may be desirable to have additional attributes (like required) behave the same way. This can be controlled with the following config value:

grails:
    tags:
        booleanToAttributes:
            - disabled
            - checked
            - readonly
            - required

Defaults are disabled, checked, readonly

Source

{source:tag=FormTagLib.field} {source}