added status validation

buying/doctype/purchase_order/purchase_order.py

@@ -128,9 +128,14 @@ class DocType(TransactionBase):
 	# Validate
 	def validate(self):
 		self.validate_fiscal_year()
-		# Step 1:=> set status as "Draft"
-		webnotes.conn.set(self.doc, 'status', 'Draft')
-		
+
+		if not self.doc.status:
+			self.doc.status = "Draft"
+
+		import utilities
+		utilities.validate_status(self.doc.status, ["Draft", "Submitted", "Stopped", 
+			"Cancelled"])
+
 		# Step 2:=> get Purchase Common Obj
 		pc_obj = get_obj(dt='Purchase Common')
 		

buying/doctype/purchase_request/purchase_request.py

@@ -141,8 +141,12 @@ class DocType:
 		self.validate_schedule_date()
 		self.validate_fiscal_year()
 		
-		# set status as "Draft"
-		webnotes.conn.set(self.doc, 'status', 'Draft')
+		if not self.doc.status:
+			self.doc.status = "Draft"
+
+		import utilities
+		utilities.validate_status(self.doc.status, ["Draft", "Submitted", "Stopped", 
+			"Cancelled"])
 
 		# Get Purchase Common Obj
 		pc_obj = get_obj(dt='Purchase Common')

buying/doctype/supplier_quotation/supplier_quotation.py

@@ -30,10 +30,16 @@ class DocType(TransactionBase):
 		self.doc.name = make_autoname(self.doc.naming_series + ".#####")
 		
 	def validate(self):
+		if not self.doc.status:
+			self.doc.status = "Draft"
+
+		import utilities
+		utilities.validate_status(self.doc.status, ["Draft", "Submitted", "Stopped", 
+			"Cancelled"])
+		
 		self.validate_fiscal_year()
 		self.validate_common()
 		self.set_in_words()
-		self.doc.status = "Draft"
 
 	def on_submit(self):
 		purchase_controller = webnotes.get_obj("Purchase Common")