65 lines
3.4 KiB
Plaintext
65 lines
3.4 KiB
Plaintext
---
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title: Relationship Field
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label: Relationship
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order: 110
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desc: The Relationship field provides the ability to relate documents together. Learn how to use Relationship fields, see examples and options.
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keywords: relationship, 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 Relationship field is one of the most powerful fields Payload features. It provides for the ability to easily relate documents together.
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</Banner>
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**Example uses:**
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- To add `Product` documents to an `Order` document
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- To allow for an `Order` to feature a `placedBy` relationship to either an `Organization` or `User` collection
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- To assign `Category` documents to `Post` documents
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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 one or many collection `slug`s to be able to assign relationships to. |
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| **`hasMany`** | Boolean when, if set to `true`, allows this field to have many relations instead of only one. |
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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. |
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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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<Banner type="success">
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<strong>Tip:</strong><br/>
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The <a href="/docs/getting-started/concepts#depth">Depth</a> parameter can be used to automatically populate related documents that are returned by the API.
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</Banner>
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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: 'placedBy', // required
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type: 'relationship', // required
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relationTo: ['organizations', 'users'], // required
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label: 'Placed By',
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hasMany: false,
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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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