64 lines
3.7 KiB
Plaintext
64 lines
3.7 KiB
Plaintext
---
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title: Upload Field
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label: Upload
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order: 180
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desc: Upload fields will allow a file to be uploaded, only from a collection supporting Uploads. Learn how to use Upload fields, see examples and options.
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keywords: upload, images media, fields, config, configuration, documentation, Content Management System, cms, headless, javascript, node, react, express
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---
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<Banner >
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The Upload field allows for the selection of a Document from a collection supporting Uploads, and formats the selection as a thumbnail in the Admin panel.
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</Banner>
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<Banner type="warning">
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<strong>Important:</strong><br/>
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To use this field, you need to have a Collection configured to allow Uploads. For more information, <a href="/docs/upload/overview">click here</a> to read about how to enable Uploads on a collection by collection basis.
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</Banner>
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**Example uses:**
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- To provide a `Page` with a featured image
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- To allow for a `Product` to deliver a downloadable asset like PDF or MP3
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- To give a layout building block the ability to feature a background image
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### Config
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| Option | Description |
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| ---------------- | ----------- |
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| **`name`** * | To be used as the property name when stored and retrieved from the database. |
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| **`*relationTo`** * | Provide a single collection `slug` to allow this field to accept a relation to. <strong>Note: the related collection must be configured to support Uploads.</strong> |
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| **`filterOptions`** | A query to filter which options appear in the UI and validate against. [More](#filtering-relationship-options). |
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| **`maxDepth`** | Sets a number limit on iterations of related documents to populate when queried. [Depth](/docs/getting-started/concepts#depth) |
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| **`label`** | Used as a field label in the Admin panel and to name the generated GraphQL type. |
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| **`unique`** | Enforce that each entry in the Collection has a unique value for this field. |
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| **`validate`** | Provide a custom validation function that will be executed on both the Admin panel and the backend. [More](/docs/fields/overview#validation) |
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| **`index`** | Build a [MongoDB index](https://docs.mongodb.com/manual/indexes/) for this field to produce faster queries. Set this field to `true` if your users will perform queries on this field's data often. |
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| **`saveToJWT`** | If this field is top-level and nested in a config supporting [Authentication](/docs/authentication/config), include its data in the user JWT. |
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| **`hooks`** | Provide field-based hooks to control logic for this field. [More](/docs/fields/overview#field-level-hooks) |
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| **`access`** | Provide field-based access control to denote what users can see and do with this field's data. [More](/docs/fields/overview#field-level-access-control) |
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| **`hidden`** | Restrict this field's visibility from all APIs entirely. Will still be saved to the database, but will not appear in any API or the Admin panel. |
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| **`defaultValue`** | Provide data to be used for this field's default value. [More](/docs/fields/overview#default-values) |
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| **`localized`** | Enable localization for this field. Requires [localization to be enabled](/docs/configuration/localization) in the Base config. |
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| **`required`** | Require this field to have a value. |
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| **`admin`** | Admin-specific configuration. See the [default field admin config](/docs/fields/overview#admin-config) for more details. |
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*\* An asterisk denotes that a property is required.*
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### Example
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`collections/ExampleCollection.js`
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```js
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{
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slug: 'example-collection',
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fields: [
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{
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name: 'backgroundImage', // required
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type: 'upload', // required
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relationTo: 'media', // required
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required: true,
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}
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]
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}
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```
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