Fixes issue #10606.
This PR makes `RICH_TEXT_V2` field behavior in REST API matche the
current behavior in GraphQL API:
Currently both `markdown` and `blocknote` fields must be included in the
request, one of them can be `null`. The field with a `null` value will
be filled by the converted value of the other field.
In other words, this works:
```
curl http://localhost:3000/rest/notes \
--request POST \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIyMDIwMjAyMC0xYzI1LTRkMDItYmYyNS02YWVjY2Y3ZWE0MTkiLCJ0eXBlIjoiQVBJX0tFWSIsIndvcmtzcGFjZUlkIjoiMjAyMDIwMjAtMWMyNS00ZDAyLWJmMjUtNmFlY2NmN2VhNDE5IiwiaWF0IjoxNzQxODA1MzQyLCJleHAiOjQ4OTU0MDUzNDEsImp0aSI6ImZlMzU0NTBkLTlhMDMtNGE2ZS04ODVjLTBlNTU3M2Y3YTE0NiJ9.6_g8cwoSE7ZCX1Zzsw44gZIyBdLKNsnDqMOmm1bKik0' \
--data '{
"position": 1,
"title": "a",
"bodyV2": {
"markdown": "test4\n\ntest3\n\n# test1\n",
"blocknote": null
},
"createdBy": {
"source": "EMAIL"
}
}'
```
And this does not work:
```
curl http://localhost:3000/rest/notes \
--request POST \
--header 'Content-Type: application/json' \
--header 'Authorization: Bearer eyJhbGciOiJIUzI1NiIsInR5cCI6IkpXVCJ9.eyJzdWIiOiIyMDIwMjAyMC0xYzI1LTRkMDItYmYyNS02YWVjY2Y3ZWE0MTkiLCJ0eXBlIjoiQVBJX0tFWSIsIndvcmtzcGFjZUlkIjoiMjAyMDIwMjAtMWMyNS00ZDAyLWJmMjUtNmFlY2NmN2VhNDE5IiwiaWF0IjoxNzQxODA1MzQyLCJleHAiOjQ4OTU0MDUzNDEsImp0aSI6ImZlMzU0NTBkLTlhMDMtNGE2ZS04ODVjLTBlNTU3M2Y3YTE0NiJ9.6_g8cwoSE7ZCX1Zzsw44gZIyBdLKNsnDqMOmm1bKik0' \
--data '{
"position": 1,
"title": "",
"body": "",
"bodyV2": {
"markdown": "test4\n\ntest3\n\n# test1\n"
},
"createdBy": {
"source": "EMAIL"
}
}'
```
---
It would be nice not to require the null value, maybe let's make that a
separate PR?
95eba07f6e