Fields
This is the last active development release of this package as Keystone 5 is now in a 6 to 12 month active maintenance phase. For more information please read our Keystone 5 and beyond post.
Keystone contains a set of primitive fields types that can be imported from the @keystonejs/fields
package:
Field type | Description |
---|
CalendarDay | An abstract "day" value; useful for Birthdays and other all-day events always celebrated in the local time zone |
Checkbox | A single Boolean value |
DateTime | A point in time and a time zone offset |
DateTimeUtc | Represents points in time, stored in UTC |
Decimal | Exact, numeric values in base-10; useful for currency, etc. |
File | Files backed various storage mediums: local filesystem, cloud based hosting, etc. |
Float | An imprecise numeric value, stored as a floating point |
Integer | A whole number |
Password | A bcrypt hash of the value supplied; used by the Password auth strategy |
Relationship | A link between the current list and others, often paired with a field on the other list |
Select | One of several predefined string values, presented as a dropdown |
Slug | Generate unique slugs (aka. keys, url segments) based on the item's data |
Text | A basic but versatile text field of arbitrary length |
Url | Extends the Text type to store HTTP URLs |
Uuid | Universally Unique Identifiers (UUIDs); useful for id fields |
Virtual | Read-only field with a developer-defined resolver, executed on read |
In addition to these, some complex types are packaged separately:
Tip: Need something else? Keystone lets you create custom field types to support almost any use case.
Usage
Fields definitions are provided when creating a list. Field definitions should be an object where the key is the field name and the value is an object containing the fields config:
const { Text } = require('@keystonejs/fields');
keystone.createList('Post', {
fields: {
title: { type: Text },
},
});
Config
Fields share some standard configuration options.
Option | Type | Default | Description |
---|
type | FieldType | (required) | |
adminDoc | String | false | A description for the field used in the AdminUI. |
schemaDoc | String | false | A description for the field used in the GraphQL schema. |
defaultValue | Any | Function | undefined | A valid default value for the field type. Functions must return a valid value. Use undefined to set no default, and null to set an empty default. |
isUnique | Boolean | false | Whether or not the field should be unique. |
isRequired | Boolean | false | Whether or not the field should be mandatory. |
access | Boolean | Function | Object | true | See: Access control options for fields. |
label | String | | Label for the field. |
adminConfig | Object | {} | Additional config which can be used when customizing admin-ui |
Note: Many field types have additional config options. See the documentation for individual field types for more detail.
type
A valid Keystone
field type.
label
Sets the label for the field in the AdminUI
adminDoc
A description of the field used in the AdminUI.
schemaDoc
A description of the field used used in the GraphQL schema.
adminConfig
Additional field configs affecting field rendering or display in admin-ui
.
adminConfig.isReadOnly
Fields with isReadOnly
set to true
will be disabled preventing users from modifying them in the Admin UI. This does not affect access control and fields can still be updated via GraphQL.
keystone.createList('Post', {
fields: {
title: { type: Text },
slug: {
type: Slug,
adminConfig: {
isReadOnly: true,
},
},
},
});
defaultValue
Sets the value when no data is provided.
keystone.createList('Post', {
fields: {
title: {
type: Text,
defaultValue: ({ context, originalInput }) => {
},
},
description: { type: Text, defaultValue: 'Lorem ipsum...' },
},
});
For a 'nullable' field, set defaultValue: null
.
The defaultValue
can be a String
or Function
. Functions should returns the value, or a Promise for the value.
isUnique
Specifies whether the value should be unique or not. Will return an error is a user tries to create a field with a non-unique value.
isRequired
Specifies whether the field is required or not. Will return an error if mutations do not contain data.
access
Access control options for fields.
Options for create
, read
, update
and delete
- can be a function or Boolean. See the access control API documentation for more details.
Note: Field level access control does not accept graphQL where clauses.
cacheHint
HTTP cache hint for field.
Only static hints are supported for fields.