Nc fix/links followup (#8994)

* fix: avoid using title as key since it's going to re-render on field name change

* fix: delete fk column only if type id ForeignKey

* fix: mark custom link as virtual and disable

* chore: lint

* refactor: on edit show relation information

* refactor: on edit show relation information

packages/nc-gui/components/smartsheet/column/EditOrAdd.vue

@@ -492,7 +492,7 @@ const isFullUpdateAllowed = computed(() => {
         <SmartsheetColumnRollupOptions v-if="formState.uidt === UITypes.Rollup" v-model:value="formState" />
         <SmartsheetColumnLinkedToAnotherRecordOptions
           v-if="formState.uidt === UITypes.LinkToAnotherRecord || formState.uidt === UITypes.Links"
-          :key="`${formState.uidt}-${formState.id || formState.title}`"
+          :key="`${formState.uidt}-${formState.id || 'new'}`"
           v-model:value="formState"
           :is-edit="isEdit"
         />

packages/nc-gui/components/smartsheet/column/LinkedToAnotherRecordOptions.vue

@@ -1,5 +1,5 @@
 <script setup lang="ts">
-import { ModelTypes, MssqlUi, RelationTypes, SqliteUi, UITypes, ViewTypes } from 'nocodb-sdk'
+import { type LinkToAnotherRecordType, ModelTypes, MssqlUi, RelationTypes, SqliteUi, UITypes, ViewTypes } from 'nocodb-sdk'
 
 const props = defineProps<{
   value: any
@@ -48,12 +48,33 @@ if (!isEdit.value) {
   if (!vModel.value.virtual) vModel.value.virtual = sqlUi === SqliteUi // appInfo.isCloud || sqlUi === SqliteUi
   if (!vModel.value.alias) vModel.value.alias = vModel.value.column_name
 } else {
-  if (!vModel.value.childId)
-    vModel.custom = {
-      ref_model_id: vModel.value?.colOptions?.fk_related_model_id,
+  const colOptions = vModel.value?.colOptions as LinkToAnotherRecordType
+  if (vModel.value?.meta?.custom && isEeUI) {
+    let ref_column_id = colOptions.fk_child_column_id
+    let column_id = colOptions.fk_parent_column_id
+
+    // extract ref column id from colOptions
+    if (
+      colOptions.type === RelationTypes.MANY_TO_MANY ||
+      colOptions.type === RelationTypes.BELONGS_TO ||
+      vModel?.value?.meta?.bt
+    ) {
+      ref_column_id = colOptions.fk_parent_column_id
+      column_id = colOptions.fk_child_column_id
+    }
+    vModel.value.custom = {
+      ref_model_id: colOptions?.fk_related_model_id,
       base_id: meta.value?.base_id,
       junc_base_id: meta.value?.base_id,
+      junc_model_id: colOptions?.fk_mm_model_id,
+      junc_ref_column_id: colOptions?.fk_mm_parent_column_id,
+      junc_column_id: colOptions?.fk_mm_child_column_id,
+      ref_column_id,
+      column_id,
+    }
   }
+  vModel.value.is_custom_link = vModel.value?.meta?.custom
+
   if (!vModel.value.childViewId) vModel.value.childViewId = vModel.value?.colOptions?.fk_target_view_id || null
 }
 if (!vModel.value.childId) vModel.value.childId = vModel.value?.colOptions?.fk_related_model_id || null
@@ -182,13 +203,14 @@ const cusJuncTableValidations = {
 }
 
 const onCustomSwitchToggle = () => {
-  if (vModel.value?.is_custom_link)
+  if (vModel.value?.is_custom_link) {
     setAdditionalValidations({
       childId: [],
       ...cusValidators,
       ...(vModel.value.type === RelationTypes.MANY_TO_MANY ? cusJuncTableValidations : {}),
     })
-  else
+    vModel.value.virtual = true
+  } else
     setAdditionalValidations({
       childId: [{ required: true, message: t('general.required') }],
     })
@@ -413,7 +435,7 @@ const handleShowAdvanceOptions = () => {
           <div class="flex flex-row">
             <a-form-item>
               <div class="flex items-center gap-1">
-                <NcSwitch v-model:checked="vModel.virtual" @change="onDataTypeChange">
+                <NcSwitch v-model:checked="vModel.virtual" :disabled="vModel.is_custom_link" @change="onDataTypeChange">
                   <div class="text-sm text-gray-800 select-none">
                     {{ $t('title.virtualRelation') }}
                   </div>

packages/nocodb/src/services/columns.service.ts

@@ -2396,7 +2396,8 @@ export class ColumnsService {
                     }
                   }
 
-                  if (mmTable) {
+                  // delete m2m table if it is made for mm relation
+                  if (mmTable?.mm) {
                     // retrieve columns in m2m table again
                     await mmTable.getColumns(context, ncMeta);
 
@@ -2597,7 +2598,7 @@ export class ColumnsService {
     await Column.delete(context, relationColOpt.fk_column_id, ncMeta);
 
     if (custom) return;
-    if (!ignoreFkDelete) {
+    if (!ignoreFkDelete && childColumn.uidt === UITypes.ForeignKey) {
       const cTable = await Model.getWithInfo(
         context,
         {
@@ -2758,7 +2759,7 @@ export class ColumnsService {
 
     if (custom) return;
 
-    if (!ignoreFkDelete) {
+    if (!ignoreFkDelete && childColumn.uidt === UITypes.ForeignKey) {
       const cTable = await Model.getWithInfo(
         context,
         {