Changeset 7921 for main/waeup.kofa/trunk

Timestamp:

20 Mar 2012, 00:51:19 (13 years ago)

Author:

uli

Message:

Add string converters for result entries.

File:

• main/waeup.kofa/trunk/src/waeup/kofa/schoolgrades.py (modified) (1 diff)

main/waeup.kofa/trunk/src/waeup/kofa/schoolgrades.py

@@ -35 +35 @@
     grade = FieldProperty(IResultEntry['grade'])
 
+    def __init__(self, subject=None, grade=None):
+        super(ResultEntry, self).__init__()
+        if subject is not None:
+            self.subject = subject
+        if grade is not None:
+            self.grade = grade
+        return
+
+    def to_string(self):
+        """A string representation that can be used in imports/export.
+
+        Returned is a unicode string of format ``(u'<SUBJ>',u'<GRADE>')``.
+        """
+        return unicode((self.subject, self.grade))
+
+    @classmethod
+    def from_string(cls, string):
+        """Create new ResultEntry instance based on `string`.
+
+        The string is expected to be in format as delivered by
+        meth:`to_string`.
+
+        This is a classmethod. This means, you normally will call::
+
+          ResultEntry.from_string(mystring)
+
+        i.e. use the `ResultEntry` class, not an instance thereof.
+        """
+        string = string.replace("u''", "None")
+        subject, grade = eval(string)
+        return cls(subject, grade)
+
 class ResultEntryField(Object):
     """A zope.schema-like field for usage in interfaces.