From 9b9c05c05501a1a81c3eaf52d70c49b19c73bcd4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ladislav=20Vit=C3=A1sek?= <vity@vity.cz>
Date: Tue, 30 Jan 2024 09:23:51 +0100
Subject: [PATCH] adding fields limitation for EntityPicker
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Signed-off-by: Ladislav Vitásek <vity@vity.cz>
---
 .changeset/four-walls-perform.md                     |  5 +++++
 .../components/fields/EntityPicker/EntityPicker.tsx  | 12 +++++++++++-
 .../src/components/fields/EntityPicker/schema.ts     |  7 +++++++
 3 files changed, 23 insertions(+), 1 deletion(-)
 create mode 100644 .changeset/four-walls-perform.md

diff --git a/.changeset/four-walls-perform.md b/.changeset/four-walls-perform.md
new file mode 100644
index 0000000000..bb30a0cc2b
--- /dev/null
+++ b/.changeset/four-walls-perform.md
@@ -0,0 +1,5 @@
+---
+'@backstage/plugin-scaffolder': minor
+---
+
+Scaffolding - EntityPicker component - now it does not load full entity data, only a specified set - defaults to `['metadata.name', 'metadata.namespace', 'metadata.title', 'kind']`. It can significantly reduce loaded time bigger data set. It's possible to set fields to ignore configure via `fieldsToIgnore` in UI options of the EntityPicker component.
diff --git a/plugins/scaffolder/src/components/fields/EntityPicker/EntityPicker.tsx b/plugins/scaffolder/src/components/fields/EntityPicker/EntityPicker.tsx
index 0d45fe771c..d2c88a0b03 100644
--- a/plugins/scaffolder/src/components/fields/EntityPicker/EntityPicker.tsx
+++ b/plugins/scaffolder/src/components/fields/EntityPicker/EntityPicker.tsx
@@ -61,14 +61,24 @@ export const EntityPicker = (props: EntityPickerProps) => {
   } = props;
   const catalogFilter = buildCatalogFilter(uiSchema);
   const defaultKind = uiSchema['ui:options']?.defaultKind;
+  const fieldsToIgnore = uiSchema['ui:options']?.fieldsToIgnore;
   const defaultNamespace =
     uiSchema['ui:options']?.defaultNamespace || undefined;
 
   const catalogApi = useApi(catalogApiRef);
 
   const { value: entities, loading } = useAsync(async () => {
+    const defaultFieldsToIgnore = [
+      'metadata.name',
+      'metadata.namespace',
+      'metadata.title',
+      'kind',
+    ];
+    const fields = fieldsToIgnore || defaultFieldsToIgnore;
     const { items } = await catalogApi.getEntities(
-      catalogFilter ? { filter: catalogFilter } : undefined,
+      catalogFilter
+        ? { filter: catalogFilter, fields: fields }
+        : { filter: undefined, fields: fields },
     );
     return items;
   });
diff --git a/plugins/scaffolder/src/components/fields/EntityPicker/schema.ts b/plugins/scaffolder/src/components/fields/EntityPicker/schema.ts
index eb1bba364b..5617ca2073 100644
--- a/plugins/scaffolder/src/components/fields/EntityPicker/schema.ts
+++ b/plugins/scaffolder/src/components/fields/EntityPicker/schema.ts
@@ -41,6 +41,13 @@ export const EntityPickerFieldSchema = makeFieldSchemaFromZod(
       .describe(
         'DEPRECATED: Use `catalogFilter` instead. List of kinds of entities to derive options from',
       ),
+    fieldsToIgnore: z
+      .array(z.string())
+      .optional()
+      .describe(
+        'Fields to ignore from loading - download only the parts of each entity that match the field declarations.' +
+          " Defaults to: fields: ['metadata.name', 'metadata.namespace', 'metadata.title', 'kind']",
+      ),
     defaultKind: z
       .string()
       .optional()