fix: Number Card to support child table doctype for filters

frappe/desk/doctype/number_card/number_card.js

@@ -28,6 +28,7 @@ frappe.ui.form.on('Number Card', {
 			frm.trigger('render_filters_table');
 		}
 		frm.trigger('create_add_to_dashboard_button');
+		frm.trigger('set_parent_document_type');
 	},
 
 	create_add_to_dashboard_button: function(frm) {
@@ -141,7 +142,9 @@ frappe.ui.form.on('Number Card', {
 		frm.set_value('filters_json', '[]');
 		frm.set_value('dynamic_filters_json', '[]');
 		frm.set_value('aggregate_function_based_on', '');
+		frm.set_value('parent_document_type', '');
 		frm.trigger('set_options');
+		frm.trigger('set_parent_document_type');
 	},
 
 	set_options: function(frm) {
@@ -317,6 +320,7 @@ frappe.ui.form.on('Number Card', {
 				frm.filter_group = new frappe.ui.FilterGroup({
 					parent: dialog.get_field('filter_area').$wrapper,
 					doctype: frm.doc.document_type,
+					parent_doctype: frm.doc.parent_document_type,
 					on_change: () => {},
 				});
 				filters && frm.filter_group.add_filters_to_filter_group(filters);
@@ -436,6 +440,36 @@ frappe.ui.form.on('Number Card', {
 
 			frm.dynamic_filter_table.find('tbody').html(filter_rows);
 		}
+	},
+
+	set_parent_document_type: async function(frm) {
+		let document_type = frm.doc.document_type;
+		let doc_is_table = document_type &&
+			(await frappe.db.get_value('DocType', document_type, 'istable')).message.istable;
+
+		frm.set_df_property('parent_document_type', 'hidden', !doc_is_table);
+
+		if (document_type && doc_is_table) {
+			let parent = await frappe.db.get_list('DocField', {
+				filters: {
+					'fieldtype': 'Table',
+					'options': document_type
+				},
+				fields: ['parent']
+			});
+
+			parent && frm.set_query('parent_document_type', function() {
+				return {
+					filters: {
+						"name": ['in', parent.map(({ parent }) => parent)]
+					}
+				};
+			});
+
+			if (parent.length === 1) {
+				frm.set_value('parent_document_type', parent[0].parent);
+			}
+		}
 	}
 
 });

frappe/desk/doctype/number_card/number_card.json

@@ -16,6 +16,7 @@
   "aggregate_function_based_on",
   "column_break_2",
   "document_type",
+  "parent_document_type",
   "report_field",
   "report_function",
   "is_public",
@@ -188,10 +189,17 @@
    "label": "Function",
    "mandatory_depends_on": "eval: doc.type == 'Report'",
    "options": "Sum\nAverage\nMinimum\nMaximum"
+  },
+  {
+   "description": "The document type selected is a child table, so the parent document type is required.",
+   "fieldname": "parent_document_type",
+   "fieldtype": "Link",
+   "label": "Parent Document Type",
+   "options": "DocType"
   }
  ],
  "links": [],
- "modified": "2020-07-23 11:11:03.391719",
+ "modified": "2022-03-10 15:34:38.210910",
  "modified_by": "Administrator",
  "module": "Desk",
  "name": "Number Card",
@@ -234,6 +242,7 @@
  "search_fields": "label, document_type",
  "sort_field": "modified",
  "sort_order": "DESC",
+ "states": [],
  "title_field": "label",
  "track_changes": 1
 }

frappe/desk/doctype/number_card/number_card.py

@@ -3,6 +3,7 @@
 # License: MIT. See LICENSE
 
 import frappe
+from frappe import _
 from frappe.model.document import Document
 from frappe.utils import cint
 from frappe.model.naming import append_number_if_name_exists
@@ -17,6 +18,13 @@ class NumberCard(Document):
 		if frappe.db.exists("Number Card", self.name):
 			self.name = append_number_if_name_exists('Number Card', self.name)
 
+	def validate(self):
+		if not self.document_type:
+			frappe.throw(_("Document type is required to create a number card"))
+
+		if self.document_type and frappe.get_meta(self.document_type).istable and not self.parent_document_type:
+			frappe.throw(_("Parent document type is required to create a number card"))
+
 	def on_update(self):
 		if frappe.conf.developer_mode and self.is_standard:
 			export_to_files(record_list=[['Number Card', self.name]], record_module=self.module)