diff --git a/erpnext/accounts/doctype/account/chart_of_accounts/chart_of_accounts.py b/erpnext/accounts/doctype/account/chart_of_accounts/chart_of_accounts.py
index 1bcc820..f4cf6fa 100644
--- a/erpnext/accounts/doctype/account/chart_of_accounts/chart_of_accounts.py
+++ b/erpnext/accounts/doctype/account/chart_of_accounts/chart_of_accounts.py
@@ -38,7 +38,7 @@
 						"report_type": report_type,
 						"account_number": account_number,
 						"account_type": child.get("account_type"),
-						"account_currency": frappe.get_cached_value('Company',  company,  "default_currency"),
+						"account_currency": frappe.db.get_value('Company',  company,  "default_currency"),
 						"tax_rate": child.get("tax_rate")
 					})
 
diff --git a/erpnext/accounts/doctype/pricing_rule/pricing_rule.py b/erpnext/accounts/doctype/pricing_rule/pricing_rule.py
index 96cd747..0979854 100644
--- a/erpnext/accounts/doctype/pricing_rule/pricing_rule.py
+++ b/erpnext/accounts/doctype/pricing_rule/pricing_rule.py
@@ -167,14 +167,14 @@
 
 	if args.transaction_type=="selling":
 		if args.customer and not (args.customer_group and args.territory):
-			customer = frappe.db.get_cached_value("Customer", args.customer, ["customer_group", "territory"])
+			customer = frappe.get_cached_value("Customer", args.customer, ["customer_group", "territory"])
 			if customer:
 				args.customer_group, args.territory = customer
 
 		args.supplier = args.supplier_group = None
 
 	elif args.supplier and not args.supplier_group:
-		args.supplier_group = frappe.db.get_cached_value("Supplier", args.supplier, "supplier_group")
+		args.supplier_group = frappe.get_cached_value("Supplier", args.supplier, "supplier_group")
 		args.customer = args.customer_group = args.territory = None
 
 	pricing_rules = get_pricing_rules(args)
@@ -209,7 +209,7 @@
 	return item_details
 
 def remove_pricing_rule_for_item(pricing_rule, item_details):
-	pricing_rule = frappe.db.get_cached_value('Pricing Rule', pricing_rule,
+	pricing_rule = frappe.get_cached_value('Pricing Rule', pricing_rule,
 		['price_or_discount', 'margin_type'], as_dict=1)
 	if pricing_rule and pricing_rule.price_or_discount == 'Discount Percentage':
 		item_details.discount_percentage = 0.0
diff --git a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
index f343165..2660490 100644
--- a/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
+++ b/erpnext/accounts/doctype/purchase_invoice/purchase_invoice.py
@@ -220,7 +220,7 @@
 					item.expense_account = warehouse_account[item.warehouse]["account"]
 				else:
 					item.expense_account = stock_not_billed_account
-
+				
 			elif not item.expense_account and for_validate:
 				throw(_("Expense account is mandatory for item {0}").format(item.item_code or item.item_name))
 
@@ -486,7 +486,6 @@
 
 				asset_amount = flt(item.net_amount) + flt(item.item_tax_amount/self.conversion_rate)
 				base_asset_amount = flt(item.base_net_amount + item.item_tax_amount)
-				item.expense_account = item.expense_account
 
 				if (not item.expense_account or frappe.db.get_value('Account',
 					item.expense_account, 'account_type') != 'Asset Received But Not Billed'):
diff --git a/erpnext/setup/doctype/email_digest/email_digest.py b/erpnext/setup/doctype/email_digest/email_digest.py
index 3ca022d..631c0bc 100644
--- a/erpnext/setup/doctype/email_digest/email_digest.py
+++ b/erpnext/setup/doctype/email_digest/email_digest.py
@@ -22,7 +22,7 @@
 		self.from_date, self.to_date = self.get_from_to_date()
 		self.set_dates()
 		self._accounts = {}
-		self.currency = frappe.get_cached_value('Company',  self.company,  "default_currency")
+		self.currency = frappe.db.get_value('Company',  self.company,  "default_currency")
 
 	def get_users(self):
 		"""get list of users"""