Updating external table UI a bit, adding the concept of defining an existing relationship, updating the data sources UI to make it a bit less cluttered and make the creation of tables more obvious.

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

@@ -4,6 +4,7 @@
   import CreateRowButton from "./buttons/CreateRowButton.svelte"
   import CreateColumnButton from "./buttons/CreateColumnButton.svelte"
   import CreateViewButton from "./buttons/CreateViewButton.svelte"
+  import ExistingRelationshipButton from "./buttons/ExistingRelationshipButton.svelte"
   import ExportButton from "./buttons/ExportButton.svelte"
   import EditRolesButton from "./buttons/EditRolesButton.svelte"
   import ManageAccessButton from "./buttons/ManageAccessButton.svelte"
@@ -114,6 +115,12 @@
       {#if isUsersTable}
         <EditRolesButton />
       {/if}
+      {#if !isInternal}
+        <ExistingRelationshipButton
+          table={$tables.selected}
+          on:updatecolumns={onUpdateColumns}
+        />
+      {/if}
       <HideAutocolumnButton bind:hideAutocolumns />
       <!-- always have the export last -->
       <ExportButton view={$tables.selected?._id} />

packages/builder/src/components/backend/DataTable/buttons/ExistingRelationshipButton.svelte

@@ -0,0 +1,54 @@
+<script>
+  import { ActionButton, Modal, notifications } from "@budibase/bbui"
+  import CreateEditRelationship from "../../Datasources/CreateEditRelationship.svelte"
+  import { datasources, tables } from "../../../../stores/backend"
+  import { createEventDispatcher } from "svelte"
+
+  export let table
+  const dispatch = createEventDispatcher()
+
+  $: plusTables = datasource?.plus
+    ? Object.values(datasource?.entities || {})
+    : []
+  $: datasource = $datasources.list.find(
+    source => source._id === table?.sourceId
+  )
+
+  let modal
+
+  async function saveRelationship() {
+    try {
+      // Create datasource
+      await datasources.save(datasource)
+      notifications.success(`Relationship information saved.`)
+      const tableList = await tables.fetch()
+      await tables.select(tableList.find(tbl => tbl._id === table._id))
+      dispatch("updatecolumns")
+    } catch (err) {
+      notifications.error(`Error saving relationship info: ${err}`)
+    }
+  }
+</script>
+
+{#if table.sourceId}
+  <div>
+    <ActionButton
+      icon="DataCorrelated"
+      primary
+      size="S"
+      quiet
+      on:click={modal.show}
+    >
+      Define existing relationship
+    </ActionButton>
+  </div>
+  <Modal bind:this={modal}>
+    <CreateEditRelationship
+      {datasource}
+      save={saveRelationship}
+      close={modal.hide}
+      {plusTables}
+      selectedFromTable={table}
+    />
+  </Modal>
+{/if}

packages/builder/src/components/backend/Datasources/CreateEditRelationship.svelte

@@ -18,10 +18,19 @@
   export let fromRelationship = {}
   export let toRelationship = {}
   export let close
+  export let selectedFromTable
 
   let originalFromName = fromRelationship.name,
     originalToName = toRelationship.name
 
+  if (fromRelationship && !fromRelationship.relationshipType) {
+    fromRelationship.relationshipType = RelationshipTypes.MANY_TO_ONE
+  }
+
+  if (toRelationship && selectedFromTable) {
+    toRelationship.tableId = selectedFromTable._id
+  }
+
   function inSchema(table, prop, ogName) {
     if (!table || !prop || prop === ogName) {
       return false
@@ -114,6 +123,7 @@
     },
   ]
   $: updateRelationshipType(fromRelationship?.relationshipType)
+  $: tableChanged(fromTable, toTable)
 
   function updateRelationshipType(fromType) {
     if (fromType === RelationshipTypes.MANY_TO_MANY) {
@@ -205,7 +215,6 @@
     originalToName = toRelationship.name
     originalFromName = fromRelationship.name
     await save()
-    await tables.fetch()
   }
 
   async function deleteRelationship() {
@@ -215,10 +224,26 @@
     await tables.fetch()
     close()
   }
+
+  function tableChanged(fromTbl, toTbl) {
+    fromRelationship.name = toTbl?.name || ""
+    errors.fromCol = ""
+    toRelationship.name = fromTbl?.name || ""
+    errors.toCol = ""
+    if (toTbl || fromTbl) {
+      checkForErrors(
+        fromTable,
+        toTable,
+        through,
+        fromRelationship,
+        toRelationship
+      )
+    }
+  }
 </script>
 
 <ModalContent
-  title="Create Relationship"
+  title="Define Relationship"
   confirmText="Save"
   onConfirm={saveRelationship}
   disabled={!valid}
@@ -234,6 +259,7 @@
   <Select
     label="Select from table"
     options={tableOptions}
+    disabled={!!selectedFromTable}
     on:change={() => ($touched.from = true)}
     bind:error={errors.from}
     bind:value={toRelationship.tableId}

packages/builder/src/pages/builder/app/[application]/data/datasource/[selectedDatasource]/index.svelte

@@ -8,11 +8,12 @@
     Layout,
     Modal,
     InlineAlert,
+    ActionButton,
   } from "@budibase/bbui"
   import { datasources, integrations, queries, tables } from "stores/backend"
   import { notifications } from "@budibase/bbui"
   import IntegrationConfigForm from "components/backend/DatasourceNavigator/TableIntegrationMenu/IntegrationConfigForm.svelte"
-  import CreateEditRelationship from "./CreateEditRelationship/CreateEditRelationship.svelte"
+  import CreateEditRelationship from "components/backend/Datasources/CreateEditRelationship.svelte"
   import CreateExternalTableModal from "./modals/CreateExternalTableModal.svelte"
   import DisplayColumnModal from "./modals/EditDisplayColumnsModal.svelte"
   import ICONS from "components/backend/DatasourceNavigator/icons"
@@ -174,14 +175,24 @@
           <Heading size="S">Tables</Heading>
           <div class="table-buttons">
             {#if plusTables && plusTables.length !== 0}
-              <Button primary on:click={openDisplayColumnModal}>
+              <ActionButton
+                size="S"
+                quiet
+                icon="ColumnSettings"
+                on:click={openDisplayColumnModal}
+              >
                 Update display columns
-              </Button>
+              </ActionButton>
             {/if}
             <div>
-              <Button primary on:click={updateDatasourceSchema}>
+              <ActionButton
+                size="S"
+                quiet
+                icon="DataRefresh"
+                on:click={updateDatasourceSchema}
+              >
                 Fetch tables from database
-              </Button>
+              </ActionButton>
             </div>
           </div>
         </div>
@@ -214,9 +225,15 @@
           <Divider />
           <div class="query-header">
             <Heading size="S">Relationships</Heading>
-            <Button primary on:click={() => openRelationshipModal()}
-              >Create relationship</Button
+            <ActionButton
+              icon="DataCorrelated"
+              primary
+              size="S"
+              quiet
+              on:click={openRelationshipModal}
             >
+              Define existing relationship
+            </ActionButton>
           </div>
           <Body>
             Tell budibase how your tables are related to get even more smart
@@ -331,7 +348,6 @@
 
   .table-buttons {
     display: grid;
-    grid-gap: var(--spacing-l);
     grid-template-columns: 1fr 1fr;
   }
 

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

@@ -11,6 +11,7 @@ export function createTablesStore() {
     const tablesResponse = await api.get(`/api/tables`)
     const tables = await tablesResponse.json()
     update(state => ({ ...state, list: tables }))
+    return tables
   }
 
   async function select(table) {