fix: Move thumbnail updation to different patch

- Thumbnail updation handled via different patch
- create_website_items will only have one purpose
- added progress bar to `create_website_items`
- code cleanup

erpnext/patches.txt

@@ -290,7 +290,7 @@ erpnext.patches.v13_0.validate_options_for_data_field
 erpnext.patches.v13_0.create_gst_payment_entry_fields
 erpnext.patches.v14_0.delete_shopify_doctypes
 erpnext.patches.v13_0.fix_invoice_statuses
-erpnext.patches.v13_0.create_website_items #19-10-2021
+erpnext.patches.v13_0.create_website_items #30-09-2021
 erpnext.patches.v13_0.populate_e_commerce_settings
 erpnext.patches.v13_0.make_homepage_products_website_items
 erpnext.patches.v13_0.replace_supplier_item_group_with_party_specific_item
@@ -318,3 +318,4 @@ erpnext.patches.v13_0.update_category_in_ltds_certificate
 erpnext.patches.v13_0.create_pan_field_for_india #2
 erpnext.patches.v14_0.delete_hub_doctypes
 erpnext.patches.v13_0.create_ksa_vat_custom_fields
+erpnext.patches.v13_0.fetch_thumbnail_in_website_items

erpnext/patches/v13_0/create_website_items.py

@@ -41,29 +41,13 @@ def execute():
 		fields=item_fields,
 		or_filters=or_filters
 	)
+	total_count = len(items)
 
-	count = 0
+	for count, item in enumerate(items, start=1):
-	for item in items:
+		if frappe.db.exists("Website Item", {"item_code": item.item_code}):
-		web_item_exists = frappe.db.exists("Website Item", {"item_code": item.item_code})
+			continue
-		thumbnail_column_exists = "thumbnail" in item_table_fields
 
-		if web_item_exists and thumbnail_column_exists:
+		# make new website item from item (publish item)
-			# if website item already exists check for empty thumbnail
-			# if empty, fetch thumbnail from Item master
-			web_item_doc = frappe.db.get_values(
-				"Website Item",
-				filters={
-					"item_code": item.item_code
-				},
-				fieldname=["website_image", "thumbnail", "name"],
-				as_dict=True
-			)[0]
-
-			if web_item_doc.get("website_image") and not web_item_doc.get("thumbnail"):
-				thumbnail = frappe.db.get_value("Item", item.item_code, "thumbnail")
-				frappe.db.set_value("Website Item", web_item_doc.name, "thumbnail", thumbnail)
-		else:
-			# else make new website item from item (publish item)
 		website_item = make_website_item(item, save=False)
 		website_item.ranking = item.get("weightage")
 
@@ -74,18 +58,13 @@ def execute():
 
 		# move Website Item Group & Website Specification table to Website Item
 		for doctype in ("Website Item Group", "Item Website Specification"):
-				web_item, item_code = website_item.name, item.item_code
+			frappe.db.set_value(
-				frappe.db.sql(f"""
+				doctype,
-					Update
+				{"parenttype": "Item", "parent": item.item_code}, # filters
-						`tab{doctype}`
+				{"parenttype": "Website Item", "parent": website_item.name} # value dict
-					set
+			)
-						parenttype = 'Website Item',
-						parent = '{web_item}'
-					where
-						parenttype = 'Item'
-						and parent = '{item_code}'
-					""")
 
-		count += 1
 		if count % 20 == 0: # commit after every 20 items
 			frappe.db.commit()
+
+		frappe.utils.update_progress_bar('Creating Website Items', count, total_count)

erpnext/patches/v13_0/fetch_thumbnail_in_website_items.py

@@ -0,0 +1,16 @@
+import frappe
+
+
+def execute():
+    if frappe.db.has_column("Item", "thumbnail"):
+        website_item = frappe.qb.DocType("Website Item").as_("wi")
+        item = frappe.qb.DocType("Item")
+
+        frappe.qb.update(website_item).inner_join(item).on(
+            website_item.item_code == item.item_code
+        ).set(
+            website_item.thumbnail, item.thumbnail
+        ).where(
+            website_item.website_image.notnull()
+            & website_item.thumbnail.isnull()
+        ).run()