Merge ERPNext Schools into ERPNext

erpnext/schools/utils.py

@@ -0,0 +1,44 @@
+# -*- coding: utf-8 -*-
+# Copyright (c) 2015, Frappe Technologies and contributors
+# For lice
+
+from __future__ import unicode_literals
+import frappe
+from frappe import _
+
+class OverlapError(frappe.ValidationError): pass
+
+def validate_overlap_for(doc, doctype, fieldname, value=None):
+	"""Checks overlap for specified feild.
+	
+	:param fieldname: Checks Overlap for this feild 
+	"""
+	
+	existing = get_overlap_for(doc, doctype, fieldname, value)
+	if existing:
+		frappe.throw(_("This {0} conflicts with {1} for {2} {3}").format(doc.doctype, existing.name,
+			doc.meta.get_label(fieldname) if not value else fieldname , value or doc.get(fieldname)), OverlapError)
+	
+def get_overlap_for(doc, doctype, fieldname, value=None):
+	"""Returns overlaping document for specified feild.
+	
+	:param fieldname: Checks Overlap for this feild 
+	"""
+
+	existing = frappe.db.sql("""select name, from_time, to_time from `tab{0}`
+		where `{1}`=%(val)s and schedule_date = %(schedule_date)s and
+		(
+			(from_time > %(from_time)s and from_time < %(to_time)s) or
+			(to_time > %(from_time)s and to_time < %(to_time)s) or
+			(%(from_time)s > from_time and %(from_time)s < to_time) or
+			(%(from_time)s = from_time and %(to_time)s = to_time))
+		and name!=%(name)s""".format(doctype, fieldname),
+		{
+			"schedule_date": doc.schedule_date,
+			"val": value or doc.get(fieldname),
+			"from_time": doc.from_time,
+			"to_time": doc.to_time,
+			"name": doc.name or "No Name"
+		}, as_dict=True)
+
+	return existing[0] if existing else None