Updating UI to have a table/column deletion check which makes sure the user understands what they are doing, also disabling external table deletion.

packages/bbui/src/Form/Core/TextField.svelte

@@ -11,6 +11,7 @@
   export let readonly = false
   export let updateOnChange = true
   export let quiet = false
+  export let dataCy
 
   const dispatch = createEventDispatcher()
   let focus = false
@@ -78,6 +79,7 @@
     {disabled}
     {readonly}
     {id}
+    data-cy={dataCy}
     value={value || ""}
     placeholder={placeholder || ""}
     on:click

packages/bbui/src/Form/Input.svelte

@@ -13,6 +13,7 @@
   export let error = null
   export let updateOnChange = true
   export let quiet = false
+  export let dataCy
 
   const dispatch = createEventDispatcher()
   const onChange = e => {
@@ -23,6 +24,7 @@
 
 <Field {label} {labelPosition} {error}>
   <TextField
+    {dataCy}
     {updateOnChange}
     {error}
     {disabled}

packages/builder/cypress/integration/createTable.spec.js

@@ -53,6 +53,7 @@ context("Create a Table", () => {
     cy.get(".spectrum-Table-editIcon > use").click()
     cy.contains("Delete").click()
     cy.wait(50)
+    cy.get(`[data-cy="delete-column-confirm"]`).type("nameupdated")
     cy.contains("Delete Column").click()
     cy.contains("nameupdated").should("not.exist")
   })
@@ -66,6 +67,7 @@ context("Create a Table", () => {
         cy.get(".actions .spectrum-Icon").click({ force: true })
       })
     cy.get(".spectrum-Menu > :nth-child(2)").click()
+    cy.get(`[data-cy="delete-table-confirm"]`).type("dog")
     cy.contains("Delete Table").click()
     cy.contains("dog").should("not.exist")
   })

packages/builder/src/components/backend/DataTable/modals/CreateEditColumn.svelte

@@ -62,6 +62,7 @@
   let indexes = [...($tables.selected.indexes || [])]
   let confirmDeleteDialog
   let deletion
+  let deleteColName
 
   $: checkConstraints(field)
   $: required = !!field?.constraints?.presence || primaryDisplay
@@ -408,9 +409,20 @@
 </ModalContent>
 <ConfirmDialog
   bind:this={confirmDeleteDialog}
-  body={`Are you sure you wish to delete this column? Your data will be deleted and this action cannot be undone.`}
   okText="Delete Column"
   onOk={deleteColumn}
   onCancel={hideDeleteDialog}
   title="Confirm Deletion"
-/>
+  disabled={deleteColName !== field.name}
+>
+  <p>
+    Are you sure you wish to delete the column <b>{field.name}?</b>
+    Your data will be deleted and this action cannot be undone - enter the column
+    name to confirm.
+  </p>
+  <Input
+    dataCy="delete-column-confirm"
+    bind:value={deleteColName}
+    placeholder={field.name}
+  />
+</ConfirmDialog>

packages/builder/src/components/backend/TableNavigator/popovers/EditTablePopover.svelte

@@ -21,8 +21,10 @@
   let originalName = table.name
   let templateScreens
   let willBeDeleted
+  let deleteTableName
 
   $: external = table?.type === "external"
+  $: allowDeletion = !external || table?.created
 
   function showDeleteModal() {
     templateScreens = $allScreens.filter(
@@ -36,15 +38,19 @@
 
   async function deleteTable() {
     const wasSelectedTable = $tables.selected
-    await tables.delete(table)
-    store.actions.screens.delete(templateScreens)
-    await tables.fetch()
-    notifications.success("Table deleted")
-    if (table.type === "external") {
-      await datasources.fetch()
-    }
-    if (wasSelectedTable && wasSelectedTable._id === table._id) {
-      $goto("./table")
+    try {
+      await tables.delete(table)
+      await store.actions.screens.delete(templateScreens)
+      await tables.fetch()
+      if (table.type === "external") {
+        await datasources.fetch()
+      }
+      notifications.success("Table deleted")
+      if (wasSelectedTable && wasSelectedTable._id === table._id) {
+        $goto("./table")
+      }
+    } catch (err) {
+      notifications.error(err)
     }
   }
 
@@ -67,7 +73,9 @@
     <Icon s hoverable name="MoreSmallList" />
   </div>
   <MenuItem icon="Edit" on:click={editorModal.show}>Edit</MenuItem>
-  <MenuItem icon="Delete" on:click={showDeleteModal}>Delete</MenuItem>
+  {#if allowDeletion}
+    <MenuItem icon="Delete" on:click={showDeleteModal}>Delete</MenuItem>
+  {/if}
 </ActionMenu>
 
 <Modal bind:this={editorModal}>
@@ -91,10 +99,13 @@
   okText="Delete Table"
   onOk={deleteTable}
   title="Confirm Deletion"
+  disabled={deleteTableName !== table.name}
 >
-  Are you sure you wish to delete the table
-  <i>{table.name}?</i>
-  The following will also be deleted:
+  <p>
+    Are you sure you wish to delete the table
+    <b>{table.name}?</b>
+    The following will also be deleted:
+  </p>
   <b>
     <div class="delete-items">
       {#each willBeDeleted as item}
@@ -102,7 +113,15 @@
       {/each}
     </div>
   </b>
-  This action cannot be undone.
+  <p>
+    This action cannot be undone - to continue please enter the table name below
+    to confirm.
+  </p>
+  <Input
+    bind:value={deleteTableName}
+    placeholder={table.name}
+    dataCy="delete-table-confirm"
+  />
 </ConfirmDialog>
 
 <style>

packages/builder/src/pages/builder/portal/apps/index.svelte

@@ -305,7 +305,11 @@
   Are you sure you want to delete the app <b>{selectedApp?.name}</b>?
 
   <p>Please enter the app name below to confirm.</p>
-  <Input bind:value={appName} data-cy="delete-app-confirmation" />
+  <Input
+    bind:value={appName}
+    data-cy="delete-app-confirmation"
+    placeholder={selectedApp?.name}
+  />
 </ConfirmDialog>
 <ConfirmDialog
   bind:this={unpublishModal}

packages/builder/src/stores/backend/tables.js

@@ -1,5 +1,5 @@
-import { writable, get } from "svelte/store"
-import { views, queries, datasources } from "./"
+import { get, writable } from "svelte/store"
+import { datasources, queries, views } from "./"
 import { cloneDeep } from "lodash/fp"
 import api from "builderStore/api"
 import { SWITCHABLE_TYPES } from "../../constants/backend"
@@ -97,7 +97,12 @@ export function createTablesStore() {
       })
     },
     delete: async table => {
-      await api.delete(`/api/tables/${table._id}/${table._rev}`)
+      const response = await api.delete(
+        `/api/tables/${table._id}/${table._rev}`
+      )
+      if (response.status !== 200) {
+        throw (await response.json()).message
+      }
       update(state => ({
         ...state,
         list: state.list.filter(existing => existing._id !== table._id),

packages/server/src/api/controllers/table/external.js

@@ -161,9 +161,13 @@ function isRelationshipSetup(column) {
 exports.save = async function (ctx) {
   const appId = ctx.appId
   const table = ctx.request.body
-  // can't do this
+  // can't do this right now
   delete table.dataImport
   const datasourceId = getDatasourceId(ctx.request.body)
+  // table doesn't exist already, note that it is created
+  if (!table._id) {
+    table.created = true
+  }
   let tableToSave = {
     type: "table",
     _id: buildExternalTableId(datasourceId, table.name),
@@ -265,6 +269,9 @@ exports.save = async function (ctx) {
 exports.destroy = async function (ctx) {
   const appId = ctx.appId
   const tableToDelete = await getTable(appId, ctx.params.tableId)
+  if (!tableToDelete || !tableToDelete.created) {
+    ctx.throw(400, "Cannot delete tables which weren't created in Budibase.")
+  }
   const datasourceId = getDatasourceId(tableToDelete)
 
   const db = new CouchDB(appId)