Common - Field validation (#15491)

Closes : https://github.com/twentyhq/core-team-issues/issues/1622

To do in other PR : 
- Add migration command for non nullable text, raw_json & array fields
- Add null transformation

---------

Co-authored-by: Weiko <corentin@twenty.com>

packages/twenty-server/src/engine/core-modules/open-api/utils/__tests__/components.utils.spec.ts

@@ -32,9 +32,9 @@ describe('computeSchemaComponents', () => {
         "lastName": "Osinski",
       },
       "fieldLinks": {
-        "additionalLinks": [],
         "primaryLinkLabel": "",
         "primaryLinkUrl": "https://narrow-help.net/",
+        "secondaryLinks": [],
       },
       "fieldMultiSelect": [
         "OPTION_1",
@@ -46,9 +46,7 @@ describe('computeSchemaComponents', () => {
         "primaryPhoneCountryCode": "FR",
         "primaryPhoneNumber": "06 10 20 30 40",
       },
-      "fieldSelect": [
-        "OPTION_1",
-      ],
+      "fieldSelect": "OPTION_1",
     },
     "properties": {
       "fieldActor": {
@@ -535,9 +533,9 @@ describe('computeSchemaComponents', () => {
         "lastName": "Jones",
       },
       "fieldLinks": {
-        "additionalLinks": [],
         "primaryLinkLabel": "",
         "primaryLinkUrl": "https://unlawful-blowgun.biz",
+        "secondaryLinks": [],
       },
       "fieldMultiSelect": [
         "OPTION_1",
@@ -549,9 +547,7 @@ describe('computeSchemaComponents', () => {
         "primaryPhoneCountryCode": "FR",
         "primaryPhoneNumber": "06 10 20 30 40",
       },
-      "fieldSelect": [
-        "OPTION_1",
-      ],
+      "fieldSelect": "OPTION_1",
     },
     "properties": {
       "fieldActor": {

packages/twenty-server/src/engine/core-modules/open-api/utils/generate-random-field-value.util.ts

@@ -58,7 +58,7 @@ export const generateRandomFieldValue = ({
       return {
         primaryLinkLabel: '',
         primaryLinkUrl: faker.internet.url(),
-        additionalLinks: [],
+        secondaryLinks: [],
       };
     }
 
@@ -82,10 +82,10 @@ export const generateRandomFieldValue = ({
 
     case FieldMetadataType.SELECT: {
       if (!isDefined(field.options) || !isDefined(field.options[0].value)) {
-        return [];
+        return null;
       }
 
-      return [field.options[0].value];
+      return field.options[0].value;
     }
 
     case FieldMetadataType.MULTI_SELECT: {