feat: virtual doctype

Virtual Doctype's data souurce can be anything a file or a secondary database table or an api

frappe/core/doctype/doctype/doctype.json

@@ -22,6 +22,7 @@
   "track_views",
   "custom",
   "beta",
+  "virtual_doctype",
   "fields_section_break",
   "fields",
   "sb1",
@@ -528,6 +529,12 @@
    "fieldname": "index_web_pages_for_search",
    "fieldtype": "Check",
    "label": "Index Web Pages for Search"
+  },
+  {
+   "default": "0",
+   "fieldname": "virtual_doctype",
+   "fieldtype": "Check",
+   "label": "Virtual DocType"
   }
  ],
  "icon": "fa fa-bolt",
@@ -609,7 +616,7 @@
    "link_fieldname": "reference_doctype"
   }
  ],
- "modified": "2020-09-24 13:13:58.227153",
+ "modified": "2020-12-14 12:48:33.752219",
  "modified_by": "Administrator",
  "module": "Core",
  "name": "DocType",

frappe/desk/form/load.py

@@ -27,9 +27,6 @@ def getdoc(doctype, name, user=None):
 	if not name:
 		name = doctype
 
-	if not frappe.db.exists(doctype, name):
-		return []
-
 	try:
 		doc = frappe.get_doc(doctype, name)
 		run_onload(doc)
@@ -43,7 +40,8 @@ def getdoc(doctype, name, user=None):
 		# add file list
 		doc.add_viewed()
 		get_docinfo(doc)
-
+	except frappe.DoesNotExistError:
+		return []
 	except Exception:
 		frappe.errprint(frappe.utils.get_traceback())
 		raise

frappe/desk/reportview.py

@@ -12,15 +12,19 @@ from frappe import _
 from six import string_types, StringIO
 from frappe.core.doctype.access_log.access_log import make_access_log
 from frappe.utils import cstr, format_duration
+from frappe.model.base_document import get_controller
 
 
 @frappe.whitelist()
 @frappe.read_only()
 def get():
 	args = get_form_params()
-
-	data = compress(execute(**args), args = args)
-
+	# If virtual doctype get data from controller het_list method
+	if frappe.db.get_value("DocType", filters={"name": args.doctype}, fieldname="virtual_doctype"):
+		controller = get_controller(args.doctype)
+		data = compress(controller(args.doctype).get_list(args))
+	else:
+		data = compress(execute(**args), args = args)
 	return data
 
 def execute(doctype, *args, **kwargs):

frappe/model/document.py

@@ -687,7 +687,7 @@ class Document(BaseDocument):
 		`self.check_docstatus_transition`."""
 		conflict = False
 		self._action = "save"
-		if not self.get('__islocal'):
+		if not self.get('__islocal') and not self.meta.virtual_doctype:
 			if self.meta.issingle:
 				modified = frappe.db.sql("""select value from tabSingles
 					where doctype=%s and field='modified' for update""", self.doctype)