def get_notebook(owner_nickname, notebook_access, notebook_name, notebook_version):
"""
Returns the notebook.
"""
content = "" #content of the book
# calculate the key to retrieve content from db
#import pdb; pdb.set_trace()
key_name=owner_nickname+"/"+notebook_access+"/"+notebook_name
#import pdb; pdb.set_trace()
# if version is not specified return the latest one from NoteBook
if notebook_version == "" or notebook_version is None:
key = db.Key.from_path("NoteBook", key_name)
else: # return the required version from NoteBookVersion
# Add version to the key to retrieve a saved version
key = db.Key.from_path("NoteBookVersion", key_name+"/"+str(notebook_version) )
if not key:
return None
notebook = NoteBook.get( key ) # get the notebook.
if notebook: # if notebook is found
return notebook # return it.
else:
return NoteBookVersion.get( key )
