Merge pull request #1446 from nabinhait/field_currency

[fix] Get field currency for child doc

frappe/model/meta.py

@@ -259,16 +259,25 @@ def get_field_currency(df, doc=None):
 
 	if not doc:
 		return None
-
-	if ":" in cstr(df.get("options")):
-		split_opts = df.get("options").split(":")
-		if len(split_opts)==3:
-			currency = frappe.db.get_value(split_opts[0], doc.get(split_opts[1]),
-				split_opts[2])
-	else:
-		currency = doc.get(df.get("options"))
-
-	return currency
+	
+	if not getattr(frappe.local, "field_currency", None):
+		frappe.local.field_currency = frappe._dict()
+		
+	if not frappe.local.field_currency.get((doc.doctype, doc.parent or doc.name), {}).get(df.fieldname):
+		if ":" in cstr(df.get("options")):
+			split_opts = df.get("options").split(":")
+			if len(split_opts)==3:
+				currency = frappe.db.get_value(split_opts[0], doc.get(split_opts[1]), split_opts[2])
+		else:
+			currency = doc.get(df.get("options"))
+			if not currency and doc.parent:
+				currency = frappe.db.get_value(doc.parenttype, doc.parent, df.get("options"))
+	
+		if currency:
+			frappe.local.field_currency.setdefault((doc.doctype, doc.parent or doc.name), frappe._dict())\
+				.setdefault(df.fieldname, currency)
+			
+	return frappe.local.field_currency.get((doc.doctype, doc.parent or doc.name), {}).get(df.fieldname)
 
 def get_field_precision(df, doc=None, currency=None):
 	"""get precision based on DocField options and fieldvalue in doc"""