More explicit validation error with field name

Author: tariqdaouda

CHANGELOG.rst

@@ -9,6 +9,7 @@
 * better documentation of connection class
 * False is not considered a Null value while validating
 * Removed redundant document creation functions
+* More explicit validation error with field name
 
 1.3.4
 =====

pyArango/document.py

@@ -65,7 +65,10 @@ def validateField(self, field):
                 return self[field].validate()
 
             if field in self.patchStore:
-                return self.validators[field].validate(self.patchStore[field])
+                try:
+                    return self.validators[field].validate(self.patchStore[field])
+                except ValidationError as e:
+                    raise ValidationError( "'%s' -> %s" % ( field, str(e)) )
             else:
                 try:
                     return self.validators[field].validate(self.store[field])