@keystonejs/fields-mongoid
v9.2.2
Published
KeystoneJS MongoId Field Type
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MongoId
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.
This field allows arbitrary Mongo ObjectId
fields to be added to your lists.
It supports the core Mongoose and Knex adapters:
- On Mongoose the native Mongo
ObjectId
schema type is used. - On Knex a 24 character string field is added to the schema.
This resolves down to
varchar(24)
,character varying(24)
or similar, depending on the underlying DB platform. Values stored are forced to lowercase on read and write to avoid issues with case-sensitive string comparisons. See the casing section for details.
Usage
const { Keystone } = require('@keystonejs/keystone');
const { MongoId } = require('@keystonejs/fields-mongoid');
const keystone = new Keystone(/* ... */);
keystone.createList('Product', {
fields: {
name: { type: Text },
oldId: { type: MongoId },
// ...
},
});
Config
| Option | Type | Default | Description |
| :----------- | :-------- | :------ | :-------------------------------------------------------------- |
| isRequired
| Boolean
| false
| Does this field require a value? |
| isUnique
| Boolean
| false
| Adds a unique index that allows only unique values to be stored |
Admin UI
We reuse the interface implementation from the native Text
field.
GraphQL
MongoId
fields use the ID
type in GraphQL.
Input fields
| Field name | Type | Description |
| :--------- | :--- | :--------------------------------------- |
| ${path}
| ID
| The ID in its 24 char hex representation |
Output fields
| Field name | Type | Description |
| :--------- | :--- | :--------------------------------------- |
| ${path}
| ID
| The ID in its 24 char hex representation |
Filters
Since MongoId
fields encode identifiers, "text" filters (eg. contains
, starts_with
, etc) are not supported.
Note also that hexadecimal encoding, as used here, is case agnostic.
As such, despite the GraphQL ID
type being encoded as Strings, all MongoId
filters are effectively case insensitive.
See the the Casing section.
| Field name | Type | Description |
| :--------------- | :----- | :------------------------------------ |
| ${path}
| ID
| Exact match to the ID provided |
| ${path}_not
| ID
| Not an exact match to the ID provided |
| ${path}_in
| [ID]
| In the array of IDs provided |
| ${path}_not_in
| [ID]
| Not in the array of IDs provided |
Storage
Mongoose adapter
The Mongoose adapter uses the native Mongo ObjectId
schema type.
Internally, the 12-byte value are stored in a binary format.
Mongoose automatically and transparently converts to and from the 24 char hexadecimal representation when reading and writing.
Knex Adapter
The Knex adapter adds 24 character string field to the schema.
This resolves down to varchar(24)
, character varying(24)
or similar, depending on the underlying DB platform.
Values stored are forced to lowercase on read and write to avoid issues with case-sensitive string comparisons. See the casing section for details.
The field adapter supplied for Knex supports
the isNotNullable
and defaultTo
options.
Casing
Mongo ObjectIDs are usually passed around in a hexadecimal string representation.
Hexadecimal itself is case agnostic; the hex value AF3D
is identical to the hex value af3d
(they encode the same value as decimal 44861
or binary 1010111100111101
).
However, JavaScript and (depending on your configuration) some DB platforms are case-sensitive;
in these contexts, the string 'AF3D'
does not equal the string 'af3d'
.
For the MongoId
type, we mitigate this problem by forcing values to lowercase when using the Knex adapter.
Similar issues are faced by the
core Uuid
field type.
It is also often represented using hexadecimal within a string.