### What?
Fixes CSV export support for polymorphic relationship and upload fields.
### Why?
Polymorphic fields in Payload use a `{ relationTo, value }` structure.
The previous implementation incorrectly accessed `.id` directly on the
top-level object, which caused issues depending on query depth or data
shape. This led to missing or invalid values in exported CSVs.
### How?
- Updated getCustomFieldFunctions to safely access relationTo and
value.id from polymorphic fields
- Ensured `hasMany` polymorphic fields export each related ID and
relationTo as separate CSV columns
Converts all text and field labels into variables that can be
translated. Also generated the translations for them
So now the UI here is internationalised
I've also moved some of the generic labels into the core package since
those could be re-used elsewhere
Adds new plugin-import-export initial version.
Allows for direct download and creation of downloadable collection data
stored to a json or csv uses the access control of the user creating the
request to make the file.
config options:
```ts
/**
* Collections to include the Import/Export controls in
* Defaults to all collections
*/
collections?: string[]
/**
* Enable to force the export to run synchronously
*/
disableJobsQueue?: boolean
/**
* This function takes the default export collection configured in the plugin and allows you to override it by modifying and returning it
* @param collection
* @returns collection
*/
overrideExportCollection?: (collection: CollectionOverride) => CollectionOverride
// payload.config.ts:
plugins: [
importExportPlugin({
collections: ['pages', 'users'],
overrideExportCollection: (collection) => {
collection.admin.group = 'System'
collection.upload.staticDir = path.resolve(dirname, 'uploads')
return collection
},
disableJobsQueue: true,
}),
],
```
---------
Co-authored-by: Jessica Chowdhury <jessica@trbl.design>
Co-authored-by: Kendell Joseph <kendelljoseph@gmail.com>
